# Fynn Docs ## Docs - [Willkommen](https://docs.fynn.eu/introduction.md): Willkommen bei Fynn! Hier findest du alles, was du brauchst, um loszulegen. - [Erste Konfiguration](https://docs.fynn.eu/guide/tenant/configure.md): Richte Fynn ein und beginne mit der Abrechnung deiner Produkte und Dienstleistungen - [Go-Live](https://docs.fynn.eu/guide/tenant/go-live-checklist.md): Best Practices und wichtige Schritte für einen erfolgreichen Produktivstart mit Fynn. - [Kunde verwalten](https://docs.fynn.eu/guide/customers/introduction.md): Erstelle und verwalte Kunden. - [E-Mail-Adressen verwalten](https://docs.fynn.eu/guide/customers/email-management.md): Verwalte E-Mail-Adressen und lege fest, welche E-Mails für Rechnungen und Mahnungen verwendet werden. - [Kundeneinstellungen](https://docs.fynn.eu/guide/customers/settings.md): Individuelle Einstellungen pro Kunde konfigurieren - [Organisationsstruktur](https://docs.fynn.eu/guide/customers/organization-hierarchy.md): Bilde Unternehmenshierarchien mit Parent-Child-Beziehungen zwischen Kunden ab. - [Kundenbereich](https://docs.fynn.eu/guide/customers/customer-portal.md): Kundenbereich - [Zahlungsmethoden verwalten](https://docs.fynn.eu/guide/payments/payment-methods.md): Hinzufügen, bearbeiten und entfernen von Zahlungsmethoden für deine Kunden - [Kundenguthaben](https://docs.fynn.eu/guide/invoices/wallet-balance.md): Verstehe, wie das Kundenguthaben funktioniert, automatisch bei Überzahlungen entsteht und auf offene Rechnungen angerechnet wird - [Wallet aufladen](https://docs.fynn.eu/guide/invoices/wallet-top-up.md): Lade das Kundenguthaben manuell oder automatisch auf, um Rechnungen vorab zu bezahlen - [Guthaben auszahlen](https://docs.fynn.eu/guide/invoices/wallet-payout.md): Zahle Kundenguthaben per SEPA-Überweisung auf das Bankkonto des Kunden aus, mit Herkunftsprüfung und automatischer Rückbuchung bei Fehlern - [E-Mail-Versand und Statusverfolgung](https://docs.fynn.eu/guide/customers/email-tracking.md): Verfolge den Versandstatus von E-Mails und verwalte die Kommunikation mit deinen Kunden. - [Produktkategorien](https://docs.fynn.eu/guide/catalogue/product-categories.md): Erstelle und verwalte deine Produktkategorien - [Produkte](https://docs.fynn.eu/guide/catalogue/products.md): Erstelle und verwalte deine Produkte - [Up- & Downgrades](https://docs.fynn.eu/guide/catalogue/product-groups.md): Definiere Upgrade- und Downgrade-Pfade für Self-Service Paketwechsel - [Add-Ons](https://docs.fynn.eu/guide/catalogue/addons.md): Erstelle und verwalte Add-Ons. - [Einheiten](https://docs.fynn.eu/guide/catalogue/units.md): Erstelle und verwalte deine Einheiten - [Preise](https://docs.fynn.eu/guide/catalogue/prices/introduction.md): Preise für deine Produkte konfigurieren - [Preisberechnung](https://docs.fynn.eu/guide/catalogue/prices/calculation.md): So berechnet Fynn die verschiedenen Preistypen im Detail - [Preis-Assistent](https://docs.fynn.eu/guide/catalogue/price-assistant.md): Erstelle und bearbeite Preispläne in natürlicher Sprache mit dem KI-Preis-Assistenten. - [Vorausabrechnung vs. Nachgelagert](https://docs.fynn.eu/guide/catalogue/pricing-and-billing-timing.md): Wann zahlt der Kunde im Voraus, wann erst danach? Entscheidungshilfe und saubere Modellierung von Mischformen. - [Gutscheine & Rabatte](https://docs.fynn.eu/guide/discounts/introduction.md): Erstelle und verwalte Gutscheine und Rabatte. - [Features](https://docs.fynn.eu/guide/entitlements/introduction.md): Erstelle und verwalte Features für deine Abo-Produkte. - [Checkout Link](https://docs.fynn.eu/guide/checkout/checkout-links.md): Lerne wie du einen Checkout Link erstellst und an deine Kunden sendest. - [Nutzungsbasierte Abrechnung](https://docs.fynn.eu/guide/catalogue/measurements/introduction.md): Rechne nach tatsächlichem Verbrauch ab - fair und transparent. - [Nutzungsmetriken](https://docs.fynn.eu/guide/catalogue/measurements/billable-metrics.md): Definiere, wie Nutzungsdaten gemessen und abgerechnet werden. - [Nutzungsbasierte Abrechnung verstehen](https://docs.fynn.eu/guide/catalogue/measurements/usage-based-billing.md): Erfahre, wie die nutzungsbasierte Abrechnung funktioniert und wie du die Nutzungsdaten interpretierst - [Nutzungsereignisse senden](https://docs.fynn.eu/guide/catalogue/usage-events-import.md): Sende Nutzungsereignisse über CSV oder die API für nutzungsbasierte Abrechnung - [Aggregationstypen](https://docs.fynn.eu/guide/catalogue/measurements/aggregation-types/overview.md): Wie Nutzungsdaten zusammengefasst werden - Summe, Anzahl, Maximum und mehr. - [Abonnements](https://docs.fynn.eu/guide/subscriptions/introduction.md): Erstelle und verwalte deine Abonnements - [Abonnement erstellen](https://docs.fynn.eu/guide/subscriptions/create.md): Erstelle neue Abonnements für deine Kunden - [Abonnement aktivieren](https://docs.fynn.eu/guide/subscriptions/activate.md): Aktiviere Abonnements und wähle einzelne Positionen zur Aktivierung aus - [Abonnement-Übergänge](https://docs.fynn.eu/guide/subscriptions/transitions.md): Wechsle Produkte und Preispläne in einem Abonnement mit automatischer Proration und Gutschriften. - [Abonnement kündigen](https://docs.fynn.eu/guide/subscriptions/cancel.md): Kündige Abonnements und verwalte Kündigungsfristen - [Abrechnung zurücksetzen](https://docs.fynn.eu/guide/subscriptions/reset-billing.md): Setze die Abrechnung ausgewählter Abo-Positionen auf ein neues Startdatum zurück - [Abonnement pausieren](https://docs.fynn.eu/guide/subscriptions/pause.md): Pausiere Abonnements vorübergehend und setze sie fort - [Abrechnungsgruppen](https://docs.fynn.eu/guide/subscriptions/billing-groups.md): Fasse mehrere Abonnements zu einer gemeinsamen Rechnung zusammen - [Übersicht](https://docs.fynn.eu/guide/invoices/introduction.md): Erstelle und verwalte deine Rechnungen - [Rechnungsdetails](https://docs.fynn.eu/guide/invoices/invoice-detail.md): Alle Informationen zu einer Rechnung auf einen Blick - [Korrigieren](https://docs.fynn.eu/guide/invoices/invoice-actions.md): Storniere, erstatte oder korrigiere Rechnungen mit den passenden Aktionen - [Belegvorlagen & Platzhalter](https://docs.fynn.eu/guide/invoices/document-templates.md): Alle verfügbaren Platzhalter für PDF-Belegvorlagen nach Dokumenttyp - [Exporte](https://docs.fynn.eu/guide/invoices/exports.md): Exportiere Rechnungen und offene Posten - [e-Rechnung](https://docs.fynn.eu/guide/invoices/e-invoicing.md): Erstelle und verwalte deine Rechnungen - [Zahlungen](https://docs.fynn.eu/guide/payments/introduction.md): Verwalte Zahlungen, Transaktionen und offene Beträge deiner Kunden - [Zahlungen verwalten](https://docs.fynn.eu/guide/payments/manage-payments.md): Füge Zahlungen hinzu, stoße fehlgeschlagene Zahlungen erneut an und verwalte Zahlungsgebühren - [Kontobewegungen](https://docs.fynn.eu/guide/payments/bank-transactions.md): Bankbuchungen automatisch synchronisieren und mit offenen Rechnungen abgleichen - [Regeln für Bankbuchungen](https://docs.fynn.eu/guide/payments/bank-transaction-rules.md): Wiederkehrende Transaktionen automatisch ignorieren mit konfigurierbaren Regeln - [Zahlungsplan](https://docs.fynn.eu/guide/payments/payment-plans.md): Teile eine offene Rechnung in zinsfreie Monatsraten auf. Das Mahnwesen ruht, solange der Plan läuft. - [Einzugsplan (Wallet)](https://docs.fynn.eu/guide/payments/wallet-charge-plan.md): Ziehe wiederkehrende Abschläge automatisch auf das Guthabenkonto deiner Kunden ein und überwache Fälligkeiten und Verzug - [Rücklastschriften](https://docs.fynn.eu/guide/payments/payment-returns.md): Bearbeite zurückgegebene SEPA-Lastschriften an einem Ort: mit automatischer Zuordnung, Wiedereinzug, Gebühren und Selbstbedienung für deine Kunden. - [Mahnwesen](https://docs.fynn.eu/guide/dunning/introduction.md): Automatisiertes Mahnwesen für Rechnungen - [Provisionen](https://docs.fynn.eu/guide/commissions/introduction.md): Vertriebsprovisionen automatisch berechnen, nachverfolgen und auszahlen, direkt aus deinen Rechnungsdaten. - [Provisionspläne](https://docs.fynn.eu/guide/commissions/plans.md): Provisionspläne definieren, wie Provisionen berechnet werden: flexible Sätze, Produktregeln und Geltungsbereiche. - [Vertriebsmitarbeiter](https://docs.fynn.eu/guide/commissions/sales-reps.md): Vertriebsmitarbeiter anlegen, Kunden zuweisen und Provisionen pro Mitarbeiter nachverfolgen. - [Provisionen & Rückforderungen](https://docs.fynn.eu/guide/commissions/earnings.md): Provisionen nachverfolgen, genehmigen und Rückforderungen bei Stornierungen verstehen. - [Auszahlungen](https://docs.fynn.eu/guide/commissions/payouts.md): Genehmigte Provisionen in Auszahlungen bündeln, freigeben und als Excel exportieren. - [Excel-Exporte](https://docs.fynn.eu/guide/commissions/exports.md): Provisionen, Auszahlungen und Deal-Daten als Excel-Dateien exportieren. - [Dashboard](https://docs.fynn.eu/guide/analytics/dashboard.md) - [Reporting](https://docs.fynn.eu/guide/analytics/reporting.md) - [KI-Assistent](https://docs.fynn.eu/guide/ai-assistant/introduction.md): Nutze den integrierten KI-Assistenten, um schnell Informationen zu finden, Daten abzufragen und durch die Plattform zu navigieren. - [Workflows](https://docs.fynn.eu/guide/ai-assistant/workflows.md): So verarbeitet der KI-Assistent komplexe Anfragen Schritt für Schritt – am Beispiel von Zahlungen, Transaktionen und Belegen. - [Berichterstellung](https://docs.fynn.eu/guide/ai-assistant/reports.md): So generierst du mit dem KI-Assistenten Berichte – inklusive automatischer Parametererfassung und Bestätigung. - [Kundeneinstellungen](https://docs.fynn.eu/guide/ai-assistant/customer-settings.md): Kundeneinstellungen per KI-Assistent abfragen und ändern – Mahnwesen, Abrechnung, Rechnungsfreigabe und Zahlungsziel. - [Listen und Tabellen](https://docs.fynn.eu/guide/list-views.md): So arbeitest du mit Listenansichten in Fynn – filtern, sortieren und anpassen. - [Filter für Rechnungen, Zahlungen und Abos](https://docs.fynn.eu/guide/invoices/list-filters.md): Beispiele, wie du die Tabellenfilter in den Rechnungs-, Zahlungs- und Abonnementlisten einsetzt. - [Suche](https://docs.fynn.eu/guide/tenant/search.md): Finde schnell und einfach Kunden, Rechnungen, Abonnements und mehr — mit Vorschau-Panels und Kontext-Hervorhebung. - [Aktivitätsprotokoll](https://docs.fynn.eu/guide/tenant/activities.md): Verfolge Aktivitäten und hinterlasse Kommentare zu wichtigen Ereignissen. - [Benutzer & Berechtigungen](https://docs.fynn.eu/guide/tenant/users.md): Lerne, wie du Benutzer zu deiner Organisation einlädst, ihre Berechtigungen verwaltest und sie sperrst oder entsperrst. - [Passkeys](https://docs.fynn.eu/guide/tenant/passkeys.md): Melde dich mit Face ID, Touch ID oder einem Hardware-Sicherheitsschlüssel an — sicher und ohne Passwort. - [Nummernkreise](https://docs.fynn.eu/guide/tenant/number-ranges.md): Nummernkreise - [Aussehen & Design](https://docs.fynn.eu/guide/tenant/appearance.md): Passe das Aussehen und Design des Warenkorbs, Kundenbereich und Dokumenten an. - [Vertriebskanäle](https://docs.fynn.eu/guide/tenant/sales-channels.md): Mehrere Marken unter einer Organisation: pro Kanal eigenes Logo, eigene Farben, eigene Domain, eigene Zahlungsmethoden und ein eigener Kundenbereich. - [Währungen](https://docs.fynn.eu/guide/tenant/currencies.md): Währungen verwalten und automatisch umrechnen - [Zahlungsmethoden](https://docs.fynn.eu/guide/tenant/payment-methods.md): Zahlungsmethoden - [Abrechnung](https://docs.fynn.eu/guide/tenant/billing.md): Verwalte deine Abrechnung, Rechnungen und Zahlungen. - [Web-Oberfläche anpassen](https://docs.fynn.eu/guide/tenant/ui-defaults.md): Passe die Web-Oberfläche an, um Arbeitsprozesse zu optimieren. - [Benutzerdefinierte Attribute](https://docs.fynn.eu/guide/tenant/custom-fields.md): Erstelle benutzerdefinierte Attribute für verschiedene Objekte. - [Angebote](https://docs.fynn.eu/guide/offers/introduction.md): Erstelle und verwalte deine Angebote. - [Benachrichtigungen](https://docs.fynn.eu/guide/notifications/introduction.md): Konfiguriere Benachrichtigungen und E-Mails. - [Eigene E-Mail-Domain](https://docs.fynn.eu/guide/notifications/custom-email-domain.md): Richte deine eigene Domain als E-Mail-Absender ein, um E-Mails direkt über deine Unternehmens-Domain zu versenden. - [Übersicht-E-Mails (Digest)](https://docs.fynn.eu/guide/notifications/digest-emails.md): Erhalte regelmäßige Zusammenfassungen mit den wichtigsten Kennzahlen und Aufgaben deiner Organisation. - [Postversand (Briefe)](https://docs.fynn.eu/guide/notifications/postversand.md): Versende Rechnungen als physischen Brief, mit automatischem Fallback von E-Mail auf Brief und voller Nachverfolgung des Zustellstatus. - [E-Mail Vorlagen Variablen](https://docs.fynn.eu/guide/notifications/template-variables.md): Alle verfügbaren Variablen für E-Mail Benachrichtigungen - [Übersicht](https://docs.fynn.eu/guide/accounting/introduction.md): Buchhaltungseinstellungen und Integrationen konfigurieren. - [Steuerberechnung](https://docs.fynn.eu/guide/accounting/tax-calculation.md): Lege fest, ob die Umsatzsteuer auf neuen Belegen horizontal pro Position oder vertikal auf Belegebene berechnet wird - [Monatsabschlüsse](https://docs.fynn.eu/guide/accounting/period-close.md): Abrechnungsperioden abschließen und nachträgliche Buchungen in abgeschlossenen Monaten verhindern - [DATEV Export](https://docs.fynn.eu/guide/accounting/datev-export.md): Exportiere Buchungen im DATEV-Format und importiere sie in dein Buchhaltungsprogramm - [Rechnungsabgrenzung (PRAP)](https://docs.fynn.eu/guide/accounting/prap.md): Passive Rechnungsabgrenzungsposten automatisch bilden und auflösen - [Kleinstbetragsdifferenzen automatisch ausbuchen](https://docs.fynn.eu/guide/accounting/small-difference-write-off.md): Restbeträge aus Unterzahlungen per Überweisung automatisch ausbuchen, wenn die Differenz einen konfigurierbaren Schwellenwert unterschreitet. - [Steuerberater-Portal](https://docs.fynn.eu/guide/accounting/tax-advisor-portal.md): Gib deiner Steuerberatung einen eigenen Zugang zu Belegen, DATEV-Auswertungen und Buchhaltungsdaten, ohne Zugriff auf dein operatives Konto. - [Entwickler](https://docs.fynn.eu/guide/developers/introduction.md): Integriere deine Anwendung mit Fynn über die API, Webhooks und erweiterte Funktionen - [Vertriebskanäle über die API](https://docs.fynn.eu/guide/developers/sales-channels.md): Wie Fynn den aktiven Vertriebskanal pro Request auflöst, wie du Kunden einem Kanal zuordnest, und die Endpunkte zum Verwalten von Kanälen, eigenen Domains und Branding. - [MCP-Server](https://docs.fynn.eu/guide/developers/mcp-server.md): Verbinde KI-Tools direkt mit deinen Fynn-Daten. Der Fynn MCP-Server stellt Kunden, Abonnements, Rechnungen, Angebote und den DATEV-Export als Werkzeuge bereit, die dein KI-Client aufruft. - [MCP-Server](https://docs.fynn.eu/guide/developers/mcp.md): Verbinde KI-Assistenten wie Claude direkt mit Fynn: Kunden anlegen und pflegen, Abonnements einsehen, Angebote vollständig erstellen und versenden, Rechnungen bearbeiten und DATEV-Exporte starten. - [Fynn Functions](https://docs.fynn.eu/guide/functions/index.md): Mit Fynn Functions kannst du das Verhalten innerhalb von Fynn anpassen. - [Webhooks](https://docs.fynn.eu/guide/webhooks/introduction.md): Konfiguriere Webhooks und erhalte Benachrichtigungen. - [Oauth2 Flow](https://docs.fynn.eu/guide/oauth2/introduction.md) - [Übersicht](https://docs.fynn.eu/integrations/overview.md): Wir bieten dir eine Vielzahl von Integrationen zu 3rd-Party-Tools und -Services, um die Funktionalität der Fynn-Plattform zu erweitern. - [Stripe Payments](https://docs.fynn.eu/integrations/payment-providers/stripe.md): Wir bieten dir eine Vielzahl von Integrationen zu 3rd-Party-Tools und -Services, um die Funktionalität der Fynn-Plattform zu erweitern. - [GoCardless](https://docs.fynn.eu/integrations/payment-providers/go-cardless.md): Wir bieten dir eine Vielzahl von Integrationen zu 3rd-Party-Tools und -Services, um die Funktionalität der Fynn-Plattform zu erweitern. - [PayPal](https://docs.fynn.eu/integrations/payment-providers/paypal.md): Wir bieten dir eine Vielzahl von Integrationen zu 3rd-Party-Tools und -Services, um die Funktionalität der Fynn-Plattform zu erweitern. - [SEPA-Lastschrift](https://docs.fynn.eu/integrations/payment-providers/sepa.md): Wir bieten dir eine Vielzahl von Integrationen zu 3rd-Party-Tools und -Services, um die Funktionalität der Fynn-Plattform zu erweitern. - [Überweisung](https://docs.fynn.eu/integrations/payment-providers/bank-transfer.md): Wir bieten dir eine Vielzahl von Integrationen zu 3rd-Party-Tools und -Services, um die Funktionalität der Fynn-Plattform zu erweitern. - [EBICS](https://docs.fynn.eu/integrations/payment-providers/ebics.md): Mit der EBICS Integration können automatisch Überweisungen und Lastschriften direkt aus Fynn heraus durchgeführt werden. - [DATEV](https://docs.fynn.eu/integrations/accounting/datev.md): Lerne, wie du Fynn mit DATEV verbindest, um Rechnungen, Stornos, Buchungssätze und Debitoren zu exportieren. - [DATEVconnect online](https://docs.fynn.eu/integrations/accounting/datev-online.md): DATEVconnect online erlaubt eine vereinfachte Synchronisation von Rechnungen, Stornos, Gutschriften, Buchungssätzen und Debitoren zwischen Fynn und DATEV Kanzlei-Rechnungswesen. - [HubSpot](https://docs.fynn.eu/integrations/crm/hubspot.md): Lerne, wie du Fynn mit HubSpot verbindest, um Angebote als Deals zu erstellen, Kontakte zu synchronisieren und Unternehmen & Deals für das Provisionsmodul zuzuordnen. - [Pipedrive](https://docs.fynn.eu/integrations/crm/pipedrive.md): Verbinde Fynn mit Pipedrive: Billing-Übersicht direkt an Organisationen, Kunden-Sync in beide Richtungen und Angebote per Deep-Link. - [Attio](https://docs.fynn.eu/integrations/crm/attio.md): Verbinde Fynn mit Attio: Abrechnungs-Widget direkt an der Company, Aktionen aus dem CRM und Kunden-Sync in beide Richtungen. - [Salesforce](https://docs.fynn.eu/integrations/crm/salesforce.md): Lerne, wie du Fynn mit Salesforce verbindest, um Daten zu übertragen. - [n8n](https://docs.fynn.eu/integrations/automation/n8n.md): Lerne, wie du Fynn mit n8n verbindest, um deine Workflows zu automatisieren und verschiedene Services zu integrieren. - [Custom PDF Rendering](https://docs.fynn.eu/integrations/custom-pdf-rendering.md): Nutze deine eigene PDF-Rendering-Engine für Rechnungen, Gutschriften und Stornos. - [Getting started](https://docs.fynn.eu/api-reference/introduction.md): Welcome to the API reference documentation for the Fynn API. - [Authentication](https://docs.fynn.eu/api-reference/authentication.md): All API endpoints are authenticated using Bearer tokens and picked up from the specification file. - [Manage payment methods on your own payment page](https://docs.fynn.eu/api-reference/guides/add-payment-method.md): Learn how to manage payment methods on your own payment page. - [Collect Usage Data](https://docs.fynn.eu/api-reference/guides/collect-usage-data.md): Send usage events to Fynn for usage-based billing. - [Wallet Top-Up](https://docs.fynn.eu/api-reference/guides/wallet-top-up.md): Initiate manual wallet top-ups and manage auto top-up rules via the API. - [Wallet Payout](https://docs.fynn.eu/api-reference/guides/wallet-payout.md): Pay out a customer wallet balance to their bank account via SEPA credit transfer over the API. - [Enable manual invoice checks](https://docs.fynn.eu/api-reference/guides/enable-manual-invoice-check.md): Learn how to enable manual invoice checks for all customers. - [Implement Self-Service Upgrades](https://docs.fynn.eu/api-reference/guides/implement-upgrades.md): Integrate product group-based upgrades and downgrades into your application - [Migration: Measurements → Nutzungsmetriken](https://docs.fynn.eu/api-reference/migrations/measurements-deprecation.md): Deprecation der Measurement-Endpunkte und Properties zugunsten der neuen Nutzungsmetriken - [Usage Events API](https://docs.fynn.eu/api-reference/usage-events/overview.md): API endpoints for usage-based billing event ingestion and retrieval. - [Register a new user](https://docs.fynn.eu/api-reference/user/register-a-new-user.md): Register a new user - [Complete the user registration](https://docs.fynn.eu/api-reference/user/complete-the-user-registration.md): Complete the user registration - [Get the current user's accounts](https://docs.fynn.eu/api-reference/user/get-the-current-users-accounts.md): Retrieves the collection of Account resources. - [Set the default tenant of the current user](https://docs.fynn.eu/api-reference/user/set-the-default-tenant-of-the-current-user.md): Set the default tenant of the current user - [Get all login activities](https://docs.fynn.eu/api-reference/user/get-all-login-activities.md): Get all login activities. - [Get the current user](https://docs.fynn.eu/api-reference/user/get-the-current-user.md): Get the current user - [Get all api tokens](https://docs.fynn.eu/api-reference/userapitoken/get-all-api-tokens.md): Get all api tokens - [Create api token](https://docs.fynn.eu/api-reference/userapitoken/create-api-token.md): Create a new api token for this user. This token can be used to authenticate against the API. The token has the same privileges as the current user account, assigned to tenant. - [Delete api token](https://docs.fynn.eu/api-reference/userapitoken/delete-api-token.md): Delete an api token - [Create a new tenant](https://docs.fynn.eu/api-reference/tenant/create-a-new-tenant.md): Creates a Tenant resource. - [Get a tenant](https://docs.fynn.eu/api-reference/tenant/get-a-tenant.md): Retrieves a Tenant resource. - [Update a tenant](https://docs.fynn.eu/api-reference/tenant/update-a-tenant.md): Updates the Tenant resource. - [Get the tenants of the current user](https://docs.fynn.eu/api-reference/tenant/get-the-tenants-of-the-current-user.md): Retrieves the collection of Tenant resources. - [Get customers](https://docs.fynn.eu/api-reference/customer/get-customers.md): Get customers - [Create customer](https://docs.fynn.eu/api-reference/customer/create-customer.md): Create customer - [Get customer](https://docs.fynn.eu/api-reference/customer/get-customer.md): Get customer - [Update customer](https://docs.fynn.eu/api-reference/customer/update-customer.md): Update customer - [Archive customer](https://docs.fynn.eu/api-reference/customer/archive-customer.md): Archives a customer. The customer is not visible anymore in the customer list. - [Delete customer](https://docs.fynn.eu/api-reference/customer/delete-customer.md): Deletes a customer. The customer can only be deleted if there are no invoices, active subscriptions or booked payments related to this customer. Otherwise you can only archive the customer. - [Add comment](https://docs.fynn.eu/api-reference/customer/add-comment.md): Add comment - [Set parent customer](https://docs.fynn.eu/api-reference/customer/set-parent-customer.md): Assigns a parent customer to establish an organizational hierarchy. The hierarchy supports a maximum of 3 levels. Circular references and self-assignment are not permitted. Both the parent and child customer must belong to the same tenant, and the parent customer must be active (not archived). - [Remove parent customer](https://docs.fynn.eu/api-reference/customer/remove-parent-customer.md): Removes the parent customer assignment, making this customer a root-level customer in the organization hierarchy. - [Get customer children](https://docs.fynn.eu/api-reference/customer/get-customer-children.md): Returns a list of direct child customers for the specified customer, including subscription metrics. When the `customer.hierarchy` feature is not enabled, an empty array is returned. - [Get customer hierarchy](https://docs.fynn.eu/api-reference/customer/get-customer-hierarchy.md): Returns the full hierarchy tree for the specified customer, starting from the root of the hierarchy. The tree is built recursively with each node containing its children. The `isCurrentCustomer` flag marks which node in the tree is the customer from the request. - [Get all customer addresses](https://docs.fynn.eu/api-reference/customeraddress/get-all-customer-addresses.md): Get all customer addresses - [Add a customer address](https://docs.fynn.eu/api-reference/customeraddress/add-a-customer-address.md): Add a customer address. A new address is set as default for the given address type. - [Get a customer address](https://docs.fynn.eu/api-reference/customeraddress/get-a-customer-address.md): Get a customer address - [Update a customer address](https://docs.fynn.eu/api-reference/customeraddress/update-a-customer-address.md): Update a customer address - [Delete a customer address](https://docs.fynn.eu/api-reference/customeraddress/delete-a-customer-address.md): Delete a customer address - [Set a customer address as default](https://docs.fynn.eu/api-reference/customeraddress/set-a-customer-address-as-default.md): Set a customer address as default. The default will be set only for the address type of the given address. - [Unset a customer address as default](https://docs.fynn.eu/api-reference/customeraddress/unset-a-customer-address-as-default.md): Unset a customer address as default. This is only possible for the default address of the type "TYPE_INVOICE". Then the default address will be used as default invoice address. - [Get customer email addresses](https://docs.fynn.eu/api-reference/customeremail/get-customer-email-addresses.md): Get customer email addresses - [Create customer email address](https://docs.fynn.eu/api-reference/customeremail/create-customer-email-address.md): Create customer email address - [Get customer email address](https://docs.fynn.eu/api-reference/customeremail/get-customer-email-address.md): Get customer email address - [Update customer email address](https://docs.fynn.eu/api-reference/customeremail/update-customer-email-address.md): Update customer email address - [Delete customer email address](https://docs.fynn.eu/api-reference/customeremail/delete-customer-email-address.md): Delete customer email address - [Set default customer email address](https://docs.fynn.eu/api-reference/customeremail/set-default-customer-email-address.md): Set a customer email as default. The default will be set only for the email type of the given email. - [Get settings](https://docs.fynn.eu/api-reference/customersettings/get-settings.md): Get all customer settings of the context - [Update settings](https://docs.fynn.eu/api-reference/customersettings/update-settings.md): Update given customer setting keys of the context. - [Generate customer authentication](https://docs.fynn.eu/api-reference/customer/authenticate-customer.md): Generates authentication tokens and a pre-authenticated link to the customer portal. Use this to allow customers to access their portal without entering credentials, or to make API calls on behalf of the customer. - [Send login email to customer](https://docs.fynn.eu/api-reference/customer/send-login-email.md): Sends an email to the customer containing a login link to the customer portal. The customer can click the link to access their portal without entering credentials. Use this for support scenarios or to help customers access their account. - [Request a login link for the customer portal](https://docs.fynn.eu/api-reference/customerotp/request-login-link.md): Sends an email with a login link to the customer portal. The customer can click the link to access their portal without entering a password. Always returns success to prevent email enumeration. - [Request a one time token for a customer](https://docs.fynn.eu/api-reference/customerotp/request-a-one-time-token-for-a-customer.md): Creates a CustomerOtp resource. - [Get all units](https://docs.fynn.eu/api-reference/unit/get-all-units.md): Get all units - [Create a unit](https://docs.fynn.eu/api-reference/unit/create-a-unit.md): Create a unit. Units will be used to define the unit of measure for products or invoice positions. - [Get a unit](https://docs.fynn.eu/api-reference/unit/get-a-unit.md): Get a unit - [Update a unit](https://docs.fynn.eu/api-reference/unit/update-a-unit.md): Update a unit - [Get all measurements.](https://docs.fynn.eu/api-reference/measurement/get-all-measurements.md): Get all measurements. - [Create a measurement.](https://docs.fynn.eu/api-reference/measurement/create-a-measurement.md): Create a measurement. - [Get a measurement.](https://docs.fynn.eu/api-reference/measurement/get-a-measurement.md): Get a measurement. - [Update a measurement.](https://docs.fynn.eu/api-reference/measurement/update-a-measurement.md): Update a measurement. - [Delete a measurement.](https://docs.fynn.eu/api-reference/measurement/delete-a-measurement.md): Delete a measurement. This is only allowed, if the measurement is not used in any plan or subscription. - [Get products](https://docs.fynn.eu/api-reference/product/get-products.md): Get products - [Create a product](https://docs.fynn.eu/api-reference/product/create-a-product.md): Create a product - [Get a product](https://docs.fynn.eu/api-reference/product/get-a-product.md): Get a product - [Update a product](https://docs.fynn.eu/api-reference/product/update-a-product.md): Update a product - [Delete a product](https://docs.fynn.eu/api-reference/product/delete-a-product.md): Delete a product - [Archive a product](https://docs.fynn.eu/api-reference/product/archive-a-product.md): Archive a product - [Get a collection of product families](https://docs.fynn.eu/api-reference/productfamily/get-a-collection-of-product-families.md): Get a collection of product families - [Create a product family](https://docs.fynn.eu/api-reference/productfamily/create-a-product-family.md): Create a product family - [Get a product family](https://docs.fynn.eu/api-reference/productfamily/get-a-product-family.md): Get a product family - [Update a product family](https://docs.fynn.eu/api-reference/productfamily/update-a-product-family.md): Update a product family - [Delete a product family](https://docs.fynn.eu/api-reference/productfamily/delete-a-product-family.md): Delete a product family - [Add products to a product family](https://docs.fynn.eu/api-reference/productfamily/add-products-to-a-product-family.md): Add products to a product family - [Get a product family tree](https://docs.fynn.eu/api-reference/productfamily/get-a-product-family-tree.md): Get a product family tree - [Get product groups](https://docs.fynn.eu/api-reference/productgroup/get-product-groups.md): Get all product groups for up- and downgrades. - [Create a product group](https://docs.fynn.eu/api-reference/productgroup/create-product-group.md): Create a new product group for up- and downgrades. - [Get a product group](https://docs.fynn.eu/api-reference/productgroup/get-product-group.md): Get a product group by ID. - [Update a product group](https://docs.fynn.eu/api-reference/productgroup/update-product-group.md): Update a product group. - [Delete a product group](https://docs.fynn.eu/api-reference/productgroup/delete-product-group.md): Delete a product group. This will remove the product group from assigned subscription items. - [Enable Up- & Downgrades](https://docs.fynn.eu/api-reference/productgroup/assign-product-group.md): Assigns a product group membership to a subscription item, enabling up- and downgrades by the customer. - [Get change options](https://docs.fynn.eu/api-reference/productgroup/get-change-options.md): Get available upgrade and downgrade options for a subscription item. Only available if the item has a product group assigned. - [Change Tier](https://docs.fynn.eu/api-reference/productgroup/apply-membership.md): Apply a product group membership to a subscription item to perform an upgrade or downgrade. - [Get all prices.](https://docs.fynn.eu/api-reference/priceplan/get-all-prices.md): Get all prices for a product. - [Create a new price plan.](https://docs.fynn.eu/api-reference/priceplan/create-a-new-price-plan.md): Create a new price plan. - [Get a price.](https://docs.fynn.eu/api-reference/priceplan/get-a-price.md): Get a price for a product. - [Update a price plan.](https://docs.fynn.eu/api-reference/priceplan/update-a-price-plan.md): Update a price plan. A price plan can only be updated, if it is not used by any subscription item. Otherwise you can archive the price plan. - [Archive a price plan.](https://docs.fynn.eu/api-reference/priceplan/archive-a-price-plan.md): Archive a price plan. Archived price plans will not be shown in any lists, until it is explicit requested. - [Get all coupons](https://docs.fynn.eu/api-reference/coupon/get-all-coupons.md): Get all coupons. - [Create a coupon](https://docs.fynn.eu/api-reference/coupon/create-a-coupon.md): You can create a coupon, which can be used by customers to get a discount on their subscription. You can create a coupon with a *fixed amount* or a *percentage*. You can also set a maximum number of uses and a maximum number of uses per customer. You can also set an end date, after which the coupon… - [Get all redeemptions for a coupon](https://docs.fynn.eu/api-reference/coupon/get-all-redeemptions-for-a-coupon.md): Get all redeemptions for a coupon. - [Get a coupon](https://docs.fynn.eu/api-reference/coupon/get-a-coupon.md): Get a coupon. - [Update a coupon](https://docs.fynn.eu/api-reference/coupon/update-a-coupon.md): Update a coupon. - [Delete a coupon](https://docs.fynn.eu/api-reference/coupon/delete-a-coupon.md): Delete a coupon. - [Toggle a coupon](https://docs.fynn.eu/api-reference/coupon/toggle-a-coupon.md): Toggle a coupon. - [Get all subscriptions](https://docs.fynn.eu/api-reference/subscription/get-all-subscriptions.md): Get all subscriptions as a list. - [Create subscription](https://docs.fynn.eu/api-reference/subscription/create-subscription.md): Create a new subscription. - [Create subscription from plan](https://docs.fynn.eu/api-reference/subscription/create-subscription-from-plan.md): Create a new subscription. - [Get subscription](https://docs.fynn.eu/api-reference/subscription/get-subscription.md): Get detailed information about a subscription. - [Update subscription](https://docs.fynn.eu/api-reference/subscription/update-subscription.md): Update a subscription. - [Delete subscription](https://docs.fynn.eu/api-reference/subscription/delete-subscription.md): Delete a subscription. This is only possible if the subscription is in draft mode. - [Activate subscription](https://docs.fynn.eu/api-reference/subscription/activate-subscription.md): Activates the subscription and starts billing. - [Get estimated amount](https://docs.fynn.eu/api-reference/subscription/get-estimated-amount.md): Get the estimated amount of the subscription. - [Get estimated invoice](https://docs.fynn.eu/api-reference/subscription/get-estimated-invoice.md): Get a preview of the estimated invoice of the subscription. - [Extend trial](https://docs.fynn.eu/api-reference/subscription/extend-trial.md): Extends the trial period of the subscription. - [Update invoice address](https://docs.fynn.eu/api-reference/subscription/update-invoice-address.md): Update the invoice address of the subscription. - [Pause subscription](https://docs.fynn.eu/api-reference/subscription/pause-subscription.md): Pause the subscription. This will stop billing and the subscription will be inactive. - [Update payment method](https://docs.fynn.eu/api-reference/subscription/update-payment-method.md): Update the payment method of the subscription. - [Order products](https://docs.fynn.eu/api-reference/subscription/order-products.md): Order products for the subscription. - [Resume subscription](https://docs.fynn.eu/api-reference/subscription/resume-subscription.md): Resume the subscription. This will start billing again. - [Revoke trial](https://docs.fynn.eu/api-reference/subscription/revoke-trial.md): Revoke the trial period of the subscription and start billing immediately, as it would without a trial. - [Cancel subscription](https://docs.fynn.eu/api-reference/subscription/cancel-subscription.md): Cancel the subscription. This will stop billing and the subscription will be inactive after the cancellation date. - [Subscription Transition](https://docs.fynn.eu/api-reference/subscription/transition.md): Transition a subscription to new products and price plans. - [Add comment](https://docs.fynn.eu/api-reference/subscription/add-comment.md): Add comment - [Get a subscription item.](https://docs.fynn.eu/api-reference/subscriptionitem/get-a-subscription-item.md): Get a subscription item. - [Update a subscription item.](https://docs.fynn.eu/api-reference/subscriptionitem/update-a-subscription-item.md): Updates the subscription item. Provided values in payload will be updated. - [Remove a subscription item.](https://docs.fynn.eu/api-reference/subscriptionitem/remove-a-subscription-item.md): Removes a subscription item. This is only possible, if the subscription item is not billed yet. - [Get a subscription item applied discount.](https://docs.fynn.eu/api-reference/subscriptionitem/get-a-subscription-item-applied-discount.md): Retrieves a SubscriptionItemAppliedDiscount resource. - [Get estimated amount](https://docs.fynn.eu/api-reference/subscriptionitem/get-estimated-amount.md): Get the estimated amount of the subscription item. - [Add a subscription measurement.](https://docs.fynn.eu/api-reference/subscription-measurement/add-a-subscription-measurement.md): Add a subscription measurement. This could be a quantity change, or a metered usage. - [Add a batch of subscription measurement.](https://docs.fynn.eu/api-reference/subscription-measurement/add-a-batch-of-subscription-measurement.md): Add a batch of subscription measurement. This could be a quantity changes, or a metered usages. - [Get a subscription measurement.](https://docs.fynn.eu/api-reference/subscription-measurement/get-a-subscription-measurement.md): Get a subscription measurement. - [Get a collection of billing groups](https://docs.fynn.eu/api-reference/billinggroup/get-a-collection-of-billing-groups.md): Get a collection of billing groups - [Create a billing group](https://docs.fynn.eu/api-reference/billinggroup/create-a-billing-group.md): Create a billing group, to group the billing date of subscriptions. If a subscription is not assigned to a billing group, it will be charged in the billing interval from creation date. - [Get a billing group](https://docs.fynn.eu/api-reference/billinggroup/get-a-billing-group.md): Get a billing group - [Get invoices](https://docs.fynn.eu/api-reference/invoice/get-invoices.md): Get all invoices. If the user is authenticated as customer (e.g. by the customerfront) the invoices are filtered by their customer. This is available for invoices, credit notes and cancellations. - [Create draft invoice](https://docs.fynn.eu/api-reference/invoice/create-draft-invoice.md): Create a new invoice in status draft. This is available for invoices only. - [Get invoice](https://docs.fynn.eu/api-reference/invoice/get-invoice.md): Get a single invoice by its id. This is available for invoices, credit notes and cancellations. - [Update draft invoice](https://docs.fynn.eu/api-reference/invoice/update-draft-invoice.md): Update a draft invoice. This is available for invoices only. - [Delete invoice](https://docs.fynn.eu/api-reference/invoice/delete-invoice.md): Delete an invoice. This is only possible if the invoice is in status "STATUS_DRAFT" or "STATUS_NEW" (waiting for approval). This is available for invoices only. - [Finalize invoice](https://docs.fynn.eu/api-reference/invoice/finalize-invoice.md): Finalize an invoice. This will generate the pdf, create a payment intent and send the invoice to the customer. *Preconditions:* - The invoice must be in status draft or new. - The invoice must have a customer address.… - [Upload custom invoice PDF](https://docs.fynn.eu/api-reference/invoice/upload-invoice-pdf.md): Upload a custom-rendered PDF for an invoice that is currently in the Finalizing state. This endpoint is used by external PDF rendering engines that receive the `invoice.pdf.generation_requested` webhook. - [Cancel invoice](https://docs.fynn.eu/api-reference/invoice/cancel-invoice.md): Cancel an invoice. This will cancel the invoice and send a cancellation email to the customer. This is only possible if the invoice is already finalized and not paid or partial paid. This is available for invoices only. - [Credit invoice](https://docs.fynn.eu/api-reference/invoice/credit-invoice.md): Credit an invoice. This will credit the given positions and send an email to the customer. This is only possible if the invoice is already finalized and paid or partial paid. This is available for invoices only. - [Duplicate invoice](https://docs.fynn.eu/api-reference/invoice/duplicate-invoice.md): Duplicate an invoice. This will create a new draft invoice with the same positions and customer address. This is available for invoices only. - [Resend invoice](https://docs.fynn.eu/api-reference/invoice/resend-invoice.md): Resend an invoice. This will resend the generated pdf to the customer as a duplicate. This is only possible if the invoice is already finalized. This is available for invoices, credit notes and cancellations. - [Get invoice download link](https://docs.fynn.eu/api-reference/invoice/get-invoice-download-link.md): Get the download link of the invoice. The link is valid for 24 hours. This is available for invoices, credit notes and cancellations. - [Get invoice preview](https://docs.fynn.eu/api-reference/invoice/get-invoice-preview.md): Get a preview of the invoice. This will generate the pdf and return it. This is available for invoices, credit notes and cancellations. - [Close invoice](https://docs.fynn.eu/api-reference/invoice/close-invoice.md): Close an invoice. This is only possible if the invoice is in status "STATUS_DRAFT" or "STATUS_NEW" (waiting for approval). This is available for invoices only. - [Add invoice payment](https://docs.fynn.eu/api-reference/invoice/add-invoice-payment.md): Add a payment to the invoice. This is only possible if the invoice is in status unpaid. This is available for invoices and credit notes. - [Set invoice customer address](https://docs.fynn.eu/api-reference/invoice/set-invoice-customer-address.md): Set an invoice address based on an existing customer address. *The vat id will be updated accordingly.* This is available for invoices only. - [Set invoice payment method](https://docs.fynn.eu/api-reference/invoice/set-invoice-payment-method.md): Set the payment method for the invoice. The payment method must be enabled and not expired. This is available for invoices only. - [Set invoice note](https://docs.fynn.eu/api-reference/invoice/set-invoice-note.md): Set the internal note of the invoice. - [Toggle dunning](https://docs.fynn.eu/api-reference/invoice/toggle-dunning.md): Disable or enable dunning for the invoice. This is only possible if the invoice is in status "STATUS_UNPAID". If dunning is enabled after it was disabled, the next dunning rule will be applied automatically. This is available for invoices only. - [Add invoice position items](https://docs.fynn.eu/api-reference/invoice/add-invoice-position-items.md): Add invoice position items to the invoice. This is only possible if the invoice is in status draft or new. This is available for invoices only. - [Add comment](https://docs.fynn.eu/api-reference/invoice/add-comment.md): Add comment. This is available for invoices, credit notes and cancellations. - [Get an invoice position item](https://docs.fynn.eu/api-reference/invoicepositionitem/get-an-invoice-position-item.md): Get an invoice position item. - [Update an invoice position item](https://docs.fynn.eu/api-reference/invoicepositionitem/update-an-invoice-position-item.md): Update an invoice position item. This is only possible for invoices that are in status draft or new. - [Delete an invoice position item](https://docs.fynn.eu/api-reference/invoicepositionitem/delete-an-invoice-position-item.md): Delete an invoice position item. This is only possible for invoices that are in status draft or new. - [Get billing run details for an invoice](https://docs.fynn.eu/api-reference/billingrun/get-billing-run-details-for-an-invoice.md): Get all billing run details which created the invoice. This includes all subscriptions, subscription items and the date range which was billed. - [Get customer's payment methods](https://docs.fynn.eu/api-reference/paymentmethod/get-customers-payment-methods.md): Get customer's payment methods. - [Create payment method](https://docs.fynn.eu/api-reference/paymentmethod/create-payment-method.md): Create a customer's payment method - [Create payment method link](https://docs.fynn.eu/api-reference/paymentmethod/create-payment-method-link.md): Create a link to request the customer to add a new payment method. The link can be sent to the customer via email. - [Migrate stripe payment methods](https://docs.fynn.eu/api-reference/paymentmethod/migrate-stripe-payment-methods.md): Assigns stripe customer ids to fynn customers, which are matched by email. After that, all **not expired** and **attached** payment methods will be created in fynn. - [Upload a document for a payment method](https://docs.fynn.eu/api-reference/paymentmethod/upload-a-document-for-a-payment-method.md): Upload a document for a payment method, e.g. a signed sepa mandate - [Get transactions](https://docs.fynn.eu/api-reference/payment-transaction/get-transactions.md): Get a list of payment transactions, which represents a payment, refund or payout. - [Get transaction](https://docs.fynn.eu/api-reference/payment-transaction/get-transaction.md): Get a payment transaction, which represents a payment, refund or payout. - [Get a list of SEPA XML files](https://docs.fynn.eu/api-reference/sepaxmlstatement/get-a-list-of-sepa-xml-files.md): Returns a list of generated SEPA XML files. - [Generate a SEPA XML file](https://docs.fynn.eu/api-reference/sepaxmlstatement/generate-a-sepa-xml-file.md): Generates a SEPA XML file from unprocessed sepa xml payments. The generated SEPA XML file needs to be uploaded to the bank **manually**. **After uploading the SEPA XML file to the bank, you need to mark the SEPA XML file as uploaded.** The SEPA XML file can contain *direct debits* and *credit* trans… - [Get a SEPA XML file](https://docs.fynn.eu/api-reference/sepaxmlstatement/get-a-sepa-xml-file.md): Returns a generated SEPA XML file. - [Delete a SEPA XML file](https://docs.fynn.eu/api-reference/sepaxmlstatement/delete-a-sepa-xml-file.md): Deletes a SEPA XML file and the associated media file. The deletion is only allowed, when the `uploaded` property is `false`. All related payment transactions will be marked as unprocessed and can be used for a new SEPA XML file. - [Mark a SEPA XML file as uploaded](https://docs.fynn.eu/api-reference/sepaxmlstatement/mark-a-sepa-xml-file-as-uploaded.md): Marks a SEPA XML file as uploaded to the bank. This means, that the SEPA XML file was uploaded to the bank already. All related payment transactions will be marked as waiting, until the grace period of the bank is over. You cannot regenerate the SEPA XML file, when it was marked as uploaded. - [Get a Sepa XML payment](https://docs.fynn.eu/api-reference/sepa-xml-payments/get-a-sepa-xml-payment.md): Get a Sepa XML payment - [Connect Klarna](https://docs.fynn.eu/api-reference/open-banking/connect-klarna.md): Connect Klarna to allow fetching transactions from your bank account - [Get connected open banking accounts](https://docs.fynn.eu/api-reference/open-banking/get-connected-open-banking-accounts.md): Get all connected open banking accounts, which allows to access transactions, balances and other information - [Get open banking account](https://docs.fynn.eu/api-reference/open-banking/get-open-banking-account.md): Get open banking account details. - [Disconnect open banking account](https://docs.fynn.eu/api-reference/open-banking/disconnect-open-banking-account.md): Disconnect an open banking account, to prevent further access to the account information - [Trigger a transaction fetch for an open banking account](https://docs.fynn.eu/api-reference/open-banking/fetch-open-banking-account-transactions.md): Queues a transaction fetch for the account, starting at the last successful access. The fetch runs asynchronously. Fetches are rate limited per account (EBICS: 15 minutes, other providers: 6 hours) to protect the quotas of the banking providers. - [Get bank account transactions](https://docs.fynn.eu/api-reference/bankaccounttransaction/get-bank-account-transactions.md): Get the bank account transactions. Bank account transactions are synchronized (e.g. by Klarna Sync) or uploaded statements from the bank account. The bank account transactions are matched with invoices and transactions. If the bank account tra… - [Get bank account transaction details](https://docs.fynn.eu/api-reference/bankaccounttransaction/get-bank-account-transaction-details.md): Get the bank account transaction details with all the assigned invoices and transactions. - [Get a bank account transaction assignment](https://docs.fynn.eu/api-reference/bankaccounttransaction/get-a-bank-account-transaction-assignment.md): Get a bank account transaction assignment, which shows the match between a bank account transaction and an invoice. - [Assign invoices to the bank account transaction.](https://docs.fynn.eu/api-reference/bankaccounttransaction/assign-invoices-to-the-bank-account-transaction.md): Assign invoices to the bank account transaction. This will create a new transaction with the remaining bank transaction amount upto the unpaid invoice amount. When the bank transaction has a remaining amount, you can assign that to other invoices. - [Assign Invoices and Book the Remainder](https://docs.fynn.eu/api-reference/bankaccounttransaction/assign-with-disposition.md): Assign one or more invoices to a bank account transaction and immediately dispose of any remaining or overpaid amount in a single request. - [Accept the suggestions](https://docs.fynn.eu/api-reference/bankaccounttransaction/accept-the-suggestions.md): Accept the suggestions for the bank account transaction. This will create a new transaction with the remaining bank transaction amount upto the unpaid invoice amounts. When the bank transaction has a remaining amount, you can assign that to other invoices. - [Ignore bank account transactions.](https://docs.fynn.eu/api-reference/bankaccounttransaction/ignore-bank-account-transactions.md): Ignore bank account transactions. The transaction will not be processed and showed in the list of transactions. This is useful for transactions that are not relevant for the business, e.g. incoming payments for rentals. Otherwise you can hide a bank transaction which is already assigned and has an o… - [Get the status count of the bank account transactions](https://docs.fynn.eu/api-reference/bankaccounttransaction/get-the-status-count-of-the-bank-account-transactions.md): Retrieves a BankAccountTransaction resource. - [Get dunning documents](https://docs.fynn.eu/api-reference/dunningdocument/get-dunning-documents.md): Get dunning documents - [Get dunning document](https://docs.fynn.eu/api-reference/dunningdocument/get-dunning-document.md): Get dunning document - [Cancel dunning document](https://docs.fynn.eu/api-reference/dunningdocument/cancel-dunning-document.md): Cancel dunning document and stop dunning process for this invoice - [Get overdue rules](https://docs.fynn.eu/api-reference/overduerule/get-overdue-rules.md): Get overdue rules. - [Update overdue rule](https://docs.fynn.eu/api-reference/overduerule/update-overdue-rule.md): Update overdue rule. - [Get offers](https://docs.fynn.eu/api-reference/offer/get-offers.md): Get a list of offers - [[Deprecated, removed 2026-08-01] Create an offer](https://docs.fynn.eu/api-reference/offer/create-an-offer.md): Create a new offer - [[Deprecated, removed 2026-08-01] Get an offer](https://docs.fynn.eu/api-reference/offer/get-an-offer.md): Get a single offer - [Update an offer](https://docs.fynn.eu/api-reference/offer/update-an-offer.md): Update an existing offer - [[Deprecated, removed 2026-08-01] Get a offer document](https://docs.fynn.eu/api-reference/offer/get-a-offer-document.md): Get a single offer document - [[Deprecated, removed 2026-08-01] Get a public offer](https://docs.fynn.eu/api-reference/offer/get-a-public-offer.md): Get a single public offer - [[Deprecated, removed 2026-08-01] Get a public offer document](https://docs.fynn.eu/api-reference/offer/get-a-public-offer-document.md): Get a single public offer document - [Add a recipient to an offer](https://docs.fynn.eu/api-reference/offer/add-a-recipient-to-an-offer.md): Add a recipient to an offer - [[Deprecated, removed 2026-08-01] Start signing an offer](https://docs.fynn.eu/api-reference/offer/start-signing-an-offer.md): Starts the signing process for a public offer and returns the signing link - [Remove an offer recipient](https://docs.fynn.eu/api-reference/offerrecipient/remove-an-offer-recipient.md): Removes an recipient from an offer. The recipient will no longer be able to access the offer. This cannot be done, when the offer is already signed. - [Change the role of an offer recipient](https://docs.fynn.eu/api-reference/offerrecipient/change-the-role-of-an-offer-recipient.md): Changes the role of an offer recipient. This cannot be done, when the offer is already signed. - [Get offer templates](https://docs.fynn.eu/api-reference/offertemplate/get-offer-templates.md): Get a list of offer templates - [Create an offer template](https://docs.fynn.eu/api-reference/offertemplate/create-an-offer-template.md): Create a new offer template - [Get an offer template](https://docs.fynn.eu/api-reference/offertemplate/get-an-offer-template.md): Get a single offer template - [Update an offer template](https://docs.fynn.eu/api-reference/offertemplate/update-an-offer-template.md): Update an existing offer template - [Create a checkout link](https://docs.fynn.eu/api-reference/checkoutlink/create-a-checkout-link.md): Create a link to allow your customers to checkout the given line items. - [Get a checkout link](https://docs.fynn.eu/api-reference/checkoutlink/get-a-checkout-link.md): Get a checkout link by its ID - [Update a checkout link](https://docs.fynn.eu/api-reference/checkoutlink/update-a-checkout-link.md): Update a checkout link by its ID - [Get a checkout link item](https://docs.fynn.eu/api-reference/checkoutlinkitem/get-a-checkout-link-item.md): Get a checkout link item by its ID - [Create a cart from a checkout link](https://docs.fynn.eu/api-reference/checkoutlink/create-a-cart-from-a-checkout-link.md): Create a cart from a checkout link by its ID - [Retrieves completed carts of the current tenant.](https://docs.fynn.eu/api-reference/cart/retrieves-completed-carts-of-the-current-tenant.md): Retrieves completed the carts of the current tenant. - [Retrieves a cart by its ID.](https://docs.fynn.eu/api-reference/cart/retrieves-a-cart-by-its-id.md): Retrieves a cart by its ID. - [Retrieves a cart by its ID.](https://docs.fynn.eu/api-reference/cart/retrieves-a-cart-by-its-id-1.md): Retrieves a cart by its ID. The cart is only returned if it is not expired. - [Changes the quantity of a cart item.](https://docs.fynn.eu/api-reference/cart/changes-the-quantity-of-a-cart-item.md): Changes the quantity of a cart item. - [Confirms a cart.](https://docs.fynn.eu/api-reference/cart/confirms-a-cart.md): Confirms a cart. - [Confirms the OTP of a cart.](https://docs.fynn.eu/api-reference/cart/confirms-the-otp-of-a-cart.md): Confirms the OTP of a cart to authenticate the customer. - [Retrieves the invoice addresses of a cart.](https://docs.fynn.eu/api-reference/cart/retrieves-the-invoice-addresses-of-a-cart.md): Retrieves the invoice addresses of a cart. - [Retrieves the payment methods of a cart.](https://docs.fynn.eu/api-reference/cart/retrieves-the-payment-methods-of-a-cart.md): Retrieves the payment methods of a cart. - [Prepares a cart for stripe.](https://docs.fynn.eu/api-reference/cart/prepares-a-cart-for-stripe.md): Prepares a cart for stripe. - [Get features](https://docs.fynn.eu/api-reference/feature/get-features.md): Retrieves the collection of Feature resources. - [Create feature](https://docs.fynn.eu/api-reference/feature/create-feature.md): Creates a Feature resource. - [Get feature](https://docs.fynn.eu/api-reference/feature/get-feature.md): Retrieves a Feature resource. - [Update feature](https://docs.fynn.eu/api-reference/feature/update-feature.md): Replaces the Feature resource. - [Update feature status](https://docs.fynn.eu/api-reference/feature/update-feature-status.md): Replaces the Feature resource. - [Assign feature](https://docs.fynn.eu/api-reference/feature/assign-feature.md): Creates a Feature resource. - [Unassign feature](https://docs.fynn.eu/api-reference/feature/unassign-feature.md): Unassign a feature. Existing entitlements **will not** be removed from the subscriptions. - [Get feature assignments](https://docs.fynn.eu/api-reference/feature/get-feature-assignments.md): Retrieves the collection of Feature resources. - [Get available features](https://docs.fynn.eu/api-reference/entitlement/get-available-features.md): Get all current available features for a subscription - [Add subscription entitlement](https://docs.fynn.eu/api-reference/entitlement/add-subscription-entitlement.md): Creates a Entitlement resource. - [Get subscription entitlements](https://docs.fynn.eu/api-reference/entitlement/get-subscription-entitlements.md): Get all entitlements of a subscription. By default, expired entitlements are excluded from the response. - [Add subscription item entitlement](https://docs.fynn.eu/api-reference/entitlement/add-subscription-item-entitlement.md): Creates a Entitlement resource. - [Get subscription item entitlements](https://docs.fynn.eu/api-reference/entitlement/get-subscription-item-entitlements.md): Get all entitlements of a subscription item. By default, expired entitlements are excluded from the response. - [Update entitlement status](https://docs.fynn.eu/api-reference/entitlement/update-entitlement-status.md): Update the status of an entitlement - [Delete entitlement](https://docs.fynn.eu/api-reference/entitlement/delete-entitlement.md): Delete an entitlement - [Get series data](https://docs.fynn.eu/api-reference/analytics/get-series-data.md): Get series data for analytics. Supported types are: customer, offer, subscription, revenue, signed-offer, open-offer. - [Get series data for subscription](https://docs.fynn.eu/api-reference/analytics/get-series-data-for-subscription.md): Get series data for subscription analytics, including MRR, new-MRR, expansion-MRR, churn-MRR. The result has one data-point for each currency and date combination. The data-point contains the MRR, new-MRR, expansion-MRR, and churn-MRR for the given currency and date. - [Get accounts](https://docs.fynn.eu/api-reference/accounting/get-accounts.md): Get accounts for postings. - [Update account](https://docs.fynn.eu/api-reference/accounting/update-account.md): Updates account name and number. Adapt the account number to your chart of accounts. - [Get postings](https://docs.fynn.eu/api-reference/accounting/get-postings.md): Get postings created for invoices, payments, invoice cancellations. - [Get all cost centres](https://docs.fynn.eu/api-reference/costcentre/get-all-cost-centres.md): Get all cost centres - [Add a cost centre](https://docs.fynn.eu/api-reference/costcentre/add-a-cost-centre.md): Add a cost centre. A cost centre can be of type KOST1 or KOST2 and must have a unique code. - [Import cost centres](https://docs.fynn.eu/api-reference/costcentre/import-cost-centres.md): Import cost centres by CSV file. The file should contain the follwing headers: name, code, type. The type can be "KOST1" or "KOST2". Already imported cost centres, identified by code, will be skipped. - [Get a cost centre](https://docs.fynn.eu/api-reference/costcentre/get-a-cost-centre.md): Get a cost centre - [Update a cost centre](https://docs.fynn.eu/api-reference/costcentre/update-a-cost-centre.md): Update a cost centre. A cost centre can be of type KOST1 or KOST2 and must have a unique code. - [Get tax groups](https://docs.fynn.eu/api-reference/tax/get-tax-groups.md): Get all tax groups - [Get tax group](https://docs.fynn.eu/api-reference/tax/get-tax-group.md): Get a tax group - [Get settings](https://docs.fynn.eu/api-reference/settings/get-settings.md): Get all settings of the context - [Update settings key](https://docs.fynn.eu/api-reference/settings/update-settings-key.md): Update given setting key of the context. - [Get all accounts of the current tenant.](https://docs.fynn.eu/api-reference/account/get-all-accounts-of-the-current-tenant.md): Retrieves the collection of Account resources. - [Deactivate account](https://docs.fynn.eu/api-reference/account/deactivate-account.md): Deactivates an account. The account will not have any access to the tenant anymore. You cannot deactivate your own account. - [Reactivate account](https://docs.fynn.eu/api-reference/account/reactivate-account.md): Reactivates an account. The account will have access again to their tenant. - [Update account role](https://docs.fynn.eu/api-reference/account/update-account-role.md): Update the role of an account. The changes will apply immediately after the next page navigation of the user. You cannot change the role of your own account. - [Get all medias](https://docs.fynn.eu/api-reference/media/get-all-medias.md): Get all medias - [Upload a file](https://docs.fynn.eu/api-reference/media/upload-a-file.md): Upload a file - [Get media folders](https://docs.fynn.eu/api-reference/media/get-media-folders.md): Get all media folders - [Get a media](https://docs.fynn.eu/api-reference/media/get-a-media.md): Get a media by id - [Create download token](https://docs.fynn.eu/api-reference/media/create-download-token.md): Create token to download media file by get request and without another authentication. - [Download by token](https://docs.fynn.eu/api-reference/media/download-by-token.md): Download a media by download token. **No authentication required** - [Get available webhook events](https://docs.fynn.eu/api-reference/webhook/get-available-webhook-events.md): Get available webhook events - [Get webhooks](https://docs.fynn.eu/api-reference/webhook/get-webhooks.md): Get webhooks - [Add webhook](https://docs.fynn.eu/api-reference/webhook/add-webhook.md): Add webhook - [Get webhook](https://docs.fynn.eu/api-reference/webhook/get-webhook.md): Get webhook - [Update webhook](https://docs.fynn.eu/api-reference/webhook/update-webhook.md): Update webhook - [Delete webhook](https://docs.fynn.eu/api-reference/webhook/delete-webhook.md): Delete webhook and all related webhook results - [Get webhook results](https://docs.fynn.eu/api-reference/webhook/get-webhook-results.md): Get webhook results - [Get webhook result](https://docs.fynn.eu/api-reference/webhook/get-webhook-result.md): Get webhook result - [Get notifications](https://docs.fynn.eu/api-reference/sentnotification/get-notifications.md): Get all sent notifications - [Get a notification](https://docs.fynn.eu/api-reference/sentnotification/get-a-notification.md): Get a notification by id - [Fynn API V2](https://docs.fynn.eu/v2-plans-api/introduction.md): Modelliere dein Angebot als Pläne mit Tarifstufen, Up- und Downgrades und Checkout über die Fynn API V2. - [Authentifizierung](https://docs.fynn.eu/v2-plans-api/authentication.md): API-Token für die Einrichtung und Kunden-Token für den Tarifwechsel im Kundenbereich. - [Asynchrone Abrechnung](https://docs.fynn.eu/v2-plans-api/billing.md): Wann abgerechnet wird, wie Änderungen in die nächste Rechnung einfließen und Rechnungen asynchron entstehen. - [Schnellstart](https://docs.fynn.eu/v2-plans-api/quickstart.md): Vom ersten Plan bis zum ersten Tarifwechsel in wenigen Aufrufen. - [Kernkonzepte](https://docs.fynn.eu/v2-plans-api/concepts.md): Plan, Tarifstufe und Position im Detail, dazu Status, Mengen und die wichtigsten Felder. - [Up- und Downgrades](https://docs.fynn.eu/v2-plans-api/upgrades-downgrades.md): Erreichbare Stufen, Kostenvorschau, Ausführung und die anteilige Berechnung. - [Checkout](https://docs.fynn.eu/v2-plans-api/checkout-and-sales-channels.md): Checkout-Links für Tarifstufen und der Weg vom Link zum Abonnement. - [List plans](https://docs.fynn.eu/v2-plans-api/plans/list-plans.md): List the plans of your Organisation. Without a status filter all statuses are returned. Supports cursor based pagination by default and page based pagination when you pass page or offset. - [Create a plan](https://docs.fynn.eu/v2-plans-api/plans/create-plan.md): Create a new plan with its tiers and items. The plan starts in draft status. Activate it before you sell or switch into it. - [Retrieve a plan](https://docs.fynn.eu/v2-plans-api/plans/get-plan.md): Retrieve a single plan with all tiers and items. - [Update a plan](https://docs.fynn.eu/v2-plans-api/plans/update-plan.md): Replace a plan as a whole. Send every tier and item you want to keep. Provide ids to keep existing rows stable, and omit rows you want removed. An archived plan cannot be updated. - [Activate a plan](https://docs.fynn.eu/v2-plans-api/plans/activate-plan.md): Move a plan from draft to active. The plan must have at least one tier and every tier must contain at least one item. - [Delete or archive a plan](https://docs.fynn.eu/v2-plans-api/plans/delete-plan.md): Delete a plan. If the plan is not referenced anywhere it is hard deleted and the response is 204. If it is still referenced by checkout links, subscriptions or schedules it is archived instead and the response is 200 with the reference counts. - [Create a checkout link](https://docs.fynn.eu/v2-plans-api/checkout-links/create-checkout-link.md): Create a checkout link that sells one tier of the plan. The returned url is the public entry point that creates a cart and redirects the buyer to the customerfront of the sales channel. - [List checkout links of a plan](https://docs.fynn.eu/v2-plans-api/checkout-links/list-checkout-links.md): List all checkout links that belong to a plan, newest first. - [Get plan switch options](https://docs.fynn.eu/v2-plans-api/customer/plan-options.md): Return the current tier of a subscription and all tiers it can reach, each with a financial preview. This endpoint runs in the customer context and requires a customer token with the customer.plan.switch scope. - [Preview a tier switch](https://docs.fynn.eu/v2-plans-api/customer/preview-plan-tier-switch.md): Return a financial preview for switching the subscription into a target tier, with optional quantity overrides. This call does not change anything. - [Switch the plan tier](https://docs.fynn.eu/v2-plans-api/customer/switch-plan-tier.md): Switch the subscription into a target tier. The change takes effect immediately or at the end of the current period, depending on the target tier. Any proration credit or charge is collected into the next invoice. - [Angebote](https://docs.fynn.eu/v2-offers-api/introduction.md): Erstelle verbindliche Angebote als gestaltetes Dokument, sende sie an deine Empfänger und lass sie online annehmen oder elektronisch unterschreiben. - [Schnellstart](https://docs.fynn.eu/v2-offers-api/quickstart.md): Vom ersten Angebot bis zur Annahme durch den Empfänger in wenigen Schritten. - [Kernkonzepte](https://docs.fynn.eu/v2-offers-api/concepts.md): Angebot, Status, Dokument-Blöcke, Empfänger und die Annahme-Optionen im Überblick. - [Der Angebots-Editor](https://docs.fynn.eu/v2-offers-api/editor.md): Wie du ein Angebot zusammenstellst, Preise hinterlegst, Variablen nutzt und Vorlagen anlegst. - [Die Angebots-Ansicht](https://docs.fynn.eu/v2-offers-api/angebots-ansicht.md): Die Ansicht, die dein Empfänger über seinen Link öffnet, und ihre Vorteile gegenüber einem PDF. - [Annahme und Signatur](https://docs.fynn.eu/v2-offers-api/acceptance-and-signing.md): Klick-Annahme, elektronische Signatur und manuelle Annahme, dazu die Sperre nach der Zusage. - [Rechnungsdaten](https://docs.fynn.eu/v2-offers-api/billing-details.md): Welche Rechnungsdaten Empfänger ergänzen oder bestätigen und wie sie in die Abrechnung einfließen. - [Veröffentlichen und Empfänger](https://docs.fynn.eu/v2-offers-api/sending-and-recipients.md): Angebote veröffentlichen, Personen einladen, Rollen vergeben und Links teilen. - [Freigaben](https://docs.fynn.eu/v2-offers-api/freigaben.md): Lege fest, dass bestimmte Angebote vor dem Versand intern freigegeben werden, und steuere den Ablauf über Regeln. - [Einstellungen](https://docs.fynn.eu/v2-offers-api/settings.md): Standardwerte für Angebote: Gegenzeichner, Druck-Annahme, Ablehnen und Gültigkeitsdauer. - [Authentifizierung](https://docs.fynn.eu/v2-offers-api/authentication.md): API-Token für die Angebots-Endpunkte und der persönliche Link für die öffentliche Ansicht. - [Webhooks](https://docs.fynn.eu/v2-offers-api/webhooks.md): Lass dein System in Echtzeit benachrichtigen, wenn ein Angebot abläuft. Aufbau des Envelopes, verfügbare Events und Beispiel-Payloads. - [List offers](https://docs.fynn.eu/v2-offers-api/offers/list-offers.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Get an offer](https://docs.fynn.eu/v2-offers-api/offers/get-offer.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Update an offer](https://docs.fynn.eu/v2-offers-api/offers/update-offer.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Download an offer as PDF](https://docs.fynn.eu/v2-offers-api/offers/download-offer.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Publish an offer](https://docs.fynn.eu/v2-offers-api/offers/publish-offer.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Accept an offer manually](https://docs.fynn.eu/v2-offers-api/offers/accept-offer.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Cancel a signing process](https://docs.fynn.eu/v2-offers-api/offers/cancel-signing.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Add a recipient](https://docs.fynn.eu/v2-offers-api/offers/add-recipient.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [List offer activity](https://docs.fynn.eu/v2-offers-api/offers/list-activities.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Archive an offer](https://docs.fynn.eu/v2-offers-api/offers/archive-offer.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Get the approval state](https://docs.fynn.eu/v2-offers-api/approval/get-approval.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Approve a pending request](https://docs.fynn.eu/v2-offers-api/approval/approve.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Reject a pending request](https://docs.fynn.eu/v2-offers-api/approval/reject.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Cancel a pending request](https://docs.fynn.eu/v2-offers-api/approval/cancel-approval.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Provisionen API](https://docs.fynn.eu/v2-commission-api/introduction.md): Provisionspläne über die Fynn API V2 anlegen und verwalten: Provisionssatz, Produktregeln und zwei monatliche Auszahlungsschwellen je Vertriebsmitarbeiter. - [Kernkonzepte](https://docs.fynn.eu/v2-commission-api/concepts.md): Die Felder eines Provisionsplans und die beiden monatlichen Auszahlungsschwellen je Vertriebsmitarbeiter. - [List commission plans](https://docs.fynn.eu/v2-commission-api/plans/list-plans.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Create a commission plan](https://docs.fynn.eu/v2-commission-api/plans/create-plan.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Get a commission plan](https://docs.fynn.eu/v2-commission-api/plans/get-plan.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Update a commission plan](https://docs.fynn.eu/v2-commission-api/plans/update-plan.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Delete a commission plan](https://docs.fynn.eu/v2-commission-api/plans/delete-plan.md): **Beta. This endpoint is unstable and may still change without notice.** Pin against the dated version and watch the changelog. - [Zahlungsplan API](https://docs.fynn.eu/v2-payment-plans-api/introduction.md): Splitte eine offene Rechnung in zinsfreie Raten, halte das Mahnwesen an und lass Fynn Lastschrift-Raten automatisch einziehen. - [Schnellstart](https://docs.fynn.eu/v2-payment-plans-api/quickstart.md): Von der offenen Rechnung bis zum laufenden Zahlungsplan in wenigen Aufrufen. - [Kernkonzepte](https://docs.fynn.eu/v2-payment-plans-api/concepts.md): Plan und Rate im Detail, dazu Status, Einzug, Beträge und die wichtigsten Felder. - [Webhooks](https://docs.fynn.eu/v2-payment-plans-api/webhooks.md): Lass dein System in Echtzeit über den Lebenszyklus eines Zahlungsplans benachrichtigen. Aufbau des Envelopes, verfügbare Events und Beispiel-Payloads. - [Create a payment plan](https://docs.fynn.eu/v2-payment-plans-api/payment-plans/create-payment-plan.md): Split an open, finalized invoice into installments. Send EITHER an explicit `installments` array OR a `split` object, never both and never neither. The installment amounts (or the computed split) must sum to the current open amount of the invoice in cents. In split mode the rounding remainder is add… - [Get a payment plan](https://docs.fynn.eu/v2-payment-plans-api/payment-plans/get-payment-plan.md): Return a single payment plan with its installments. - [Get the payment plan of an invoice](https://docs.fynn.eu/v2-payment-plans-api/payment-plans/get-invoice-payment-plan.md): Return the payment plan attached to an invoice. If an active plan exists it is returned, otherwise the most recent plan of any status. Responds with 404 if the invoice never had a plan. - [Cancel a payment plan](https://docs.fynn.eu/v2-payment-plans-api/payment-plans/cancel-payment-plan.md): Cancel an active or broken payment plan. No request body. The plan moves to `canceled` and dunning for the invoice resumes on the next run, because the open amount is due again. A completed or already canceled plan cannot be canceled (422). - [Extend a payment plan](https://docs.fynn.eu/v2-payment-plans-api/payment-plans/extend-payment-plan.md): Replace every not-yet-paid installment with a new schedule. Already paid installments stay untouched. Send EITHER `installments` OR `split`, exactly like create but without `invoiceId`. The new schedule must sum to the current open amount of the invoice in cents (in split mode the server computes it… - [Produkt-Updates Juli 2026](https://docs.fynn.eu/changelog/2026-07.md): Steuerberater-Portal, neue Auswertungen, Wallet-Einzugsplan und Auszahlungen, automatische Bearbeitung von Rücklastschriften, Postversand, persönliche API-Token und MCP-Server, dazu der neue Angebots-Editor, Vertriebskanäle und vertikale Steuerberechnung. - [Produkt-Updates April 2026](https://docs.fynn.eu/changelog/2026-04.md): Neue Funktionen und Verbesserungen in Fynn im April 2026. - [Produkt-Updates März 2026](https://docs.fynn.eu/changelog/2026-03.md): Neue Funktionen und Verbesserungen in Fynn im März 2026. - [Produkt-Updates Februar 2026](https://docs.fynn.eu/changelog/2026-02.md): Neue Funktionen und Verbesserungen in Fynn im Februar 2026. - [Produkt-Updates Januar 2026](https://docs.fynn.eu/changelog/2026-01.md): Neue Funktionen und Verbesserungen in Fynn im Januar 2026. - [Produkt-Updates Dezember 2025](https://docs.fynn.eu/changelog/2025-12.md): Neue Funktionen und Verbesserungen in Fynn im Dezember 2025. - [Produkt-Updates November 2025](https://docs.fynn.eu/changelog/2025-11.md): Neue Funktionen und Verbesserungen in Fynn im November 2025. - [Produkt-Updates Oktober 2025](https://docs.fynn.eu/changelog/2025-10.md): Neue Funktionen und Verbesserungen in Fynn im Oktober 2025. - [Produkt-Updates August 2025](https://docs.fynn.eu/changelog/2025-08.md): Neue Funktionen und Verbesserungen in Fynn im August 2025. - [Produkt-Updates Juli 2025](https://docs.fynn.eu/changelog/2025-07.md): Neue Funktionen und Verbesserungen in Fynn im Juli 2025. - [Produkt-Updates Juni 2025](https://docs.fynn.eu/changelog/2025-06.md): Neue Funktionen und Verbesserungen in Fynn im Juni 2025. - [Produkt-Updates Mai 2025](https://docs.fynn.eu/changelog/2025-05.md): Neue Funktionen und Verbesserungen in Fynn im Mai 2025. - [Produkt-Updates April 2025](https://docs.fynn.eu/changelog/2025-04.md): Neue Funktionen und Verbesserungen in Fynn im April 2025. - [Produkt-Updates März 2025](https://docs.fynn.eu/changelog/2025-03.md): Neue Funktionen und Verbesserungen in Fynn im März 2025. - [Produkt-Updates Dezember 2024](https://docs.fynn.eu/changelog/2024-12.md): Neue Funktionen und Verbesserungen in Fynn im Dezember 2024. - [Produkt-Updates November 2024](https://docs.fynn.eu/changelog/2024-11.md): Neue Funktionen und Verbesserungen in Fynn im November 2024. - [Produkt-Updates Oktober 2024](https://docs.fynn.eu/changelog/2024-10.md): Neue Funktionen und Verbesserungen in Fynn im Oktober 2024. - [Produkt-Updates September 2024](https://docs.fynn.eu/changelog/2024-09.md): Neue Funktionen und Verbesserungen in Fynn im September 2024. - [Produkt-Updates August 2024](https://docs.fynn.eu/changelog/2024-08.md): Neue Funktionen und Verbesserungen in Fynn im August 2024. - [Produkt-Updates Juni 2024](https://docs.fynn.eu/changelog/2024-06.md): Neue Funktionen und Verbesserungen in Fynn im Juni 2024. - [Produkt-Updates Mai 2024](https://docs.fynn.eu/changelog/2024-05.md): Neue Funktionen und Verbesserungen in Fynn im Mai 2024. ## OpenAPI Specs - [openapi](https://docs.fynn.eu/assets/openapi.json) - [openapi-v2-offers](https://docs.fynn.eu/assets/openapi-v2-offers.json) - [openapi-v2-payment-plans](https://docs.fynn.eu/assets/openapi-v2-payment-plans.json) - [openapi-v2-commission](https://docs.fynn.eu/assets/openapi-v2-commission.json) - [openapi-v2-plans](https://docs.fynn.eu/assets/openapi-v2-plans.json)