curl -X PUT \
 /public/checkout/cart/{id}/confirm \
 --header "Content-Type: application/json" \
 --header "Authorization: Bearer <token>" \
 --data '{
    "email": "",
    "phone": "",
    "invoiceAddressId": "https:\/\/example.com\/",
    "paymentMethodId": "https:\/\/example.com\/"
}'

import requests

url = "https://coreapi.io/public/checkout/cart/{id}/confirm"

payload = {
    "email": "jsmith@example.com",
    "phone": "<string>",
    "newInvoiceAddress": {
        "countryCode": "DE",
        "firstName": "John",
        "lastName": "Doe",
        "vatId": "DE123456789",
        "companyName": "Acme Inc.",
        "street": "Musterstraße 1",
        "houseNumber": "1a",
        "zip": "12345",
        "city": "Berlin",
        "addition": "c/o John Doe",
        "salutation": "Herr",
        "costCentre": "12345",
        "type": "TYPE_DEFAULT"
    },
    "invoiceAddressId": "https://example.com/",
    "newPaymentMethod": {
        "gateway": "stripe",
        "type": "card",
        "customerId": "ad8f3b9e-1b1a-4b9a-9b9a-9b9a9b9a9b9a",
        "isDefault": True,
        "futureUsageAllowed": True,
        "stripe": {
            "paymentMethodId": "pm_1J5J2n2eZvKYlo2CJY2n2eZvKYlo2C",
            "customerId": "cus_J5J2n2eZvKYlo2CJY2n2eZvKYlo2C"
        },
        "sepaMandate": {
            "iban": "DE89370400440532013000",
            "bic": "COBADEFFXXX",
            "accountHolder": "Max Mustermann",
            "mandateReference": "MNDT-123456789",
            "signingDate": "2021-01-01",
            "type": "CORE",
            "sequence": "FRST"
        },
        "goCardless": {
            "customerId": "CU123456789",
            "mandateId": "MD123456789"
        },
        "redirectUrl": "https://example.com/checkout/confirm"
    },
    "paymentMethodId": "https://example.com/"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    email: 'jsmith@example.com',
    phone: '<string>',
    newInvoiceAddress: {
      countryCode: 'DE',
      firstName: 'John',
      lastName: 'Doe',
      vatId: 'DE123456789',
      companyName: 'Acme Inc.',
      street: 'Musterstraße 1',
      houseNumber: '1a',
      zip: '12345',
      city: 'Berlin',
      addition: 'c/o John Doe',
      salutation: 'Herr',
      costCentre: '12345',
      type: 'TYPE_DEFAULT'
    },
    invoiceAddressId: 'https://example.com/',
    newPaymentMethod: {
      gateway: 'stripe',
      type: 'card',
      customerId: 'ad8f3b9e-1b1a-4b9a-9b9a-9b9a9b9a9b9a',
      isDefault: true,
      futureUsageAllowed: true,
      stripe: {
        paymentMethodId: 'pm_1J5J2n2eZvKYlo2CJY2n2eZvKYlo2C',
        customerId: 'cus_J5J2n2eZvKYlo2CJY2n2eZvKYlo2C'
      },
      sepaMandate: {
        iban: 'DE89370400440532013000',
        bic: 'COBADEFFXXX',
        accountHolder: 'Max Mustermann',
        mandateReference: 'MNDT-123456789',
        signingDate: '2021-01-01',
        type: 'CORE',
        sequence: 'FRST'
      },
      goCardless: {customerId: 'CU123456789', mandateId: 'MD123456789'},
      redirectUrl: 'https://example.com/checkout/confirm'
    },
    paymentMethodId: 'https://example.com/'
  })
};

fetch('https://coreapi.io/public/checkout/cart/{id}/confirm', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://coreapi.io/public/checkout/cart/{id}/confirm",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'email' => 'jsmith@example.com',
    'phone' => '<string>',
    'newInvoiceAddress' => [
        'countryCode' => 'DE',
        'firstName' => 'John',
        'lastName' => 'Doe',
        'vatId' => 'DE123456789',
        'companyName' => 'Acme Inc.',
        'street' => 'Musterstraße 1',
        'houseNumber' => '1a',
        'zip' => '12345',
        'city' => 'Berlin',
        'addition' => 'c/o John Doe',
        'salutation' => 'Herr',
        'costCentre' => '12345',
        'type' => 'TYPE_DEFAULT'
    ],
    'invoiceAddressId' => 'https://example.com/',
    'newPaymentMethod' => [
        'gateway' => 'stripe',
        'type' => 'card',
        'customerId' => 'ad8f3b9e-1b1a-4b9a-9b9a-9b9a9b9a9b9a',
        'isDefault' => true,
        'futureUsageAllowed' => true,
        'stripe' => [
                'paymentMethodId' => 'pm_1J5J2n2eZvKYlo2CJY2n2eZvKYlo2C',
                'customerId' => 'cus_J5J2n2eZvKYlo2CJY2n2eZvKYlo2C'
        ],
        'sepaMandate' => [
                'iban' => 'DE89370400440532013000',
                'bic' => 'COBADEFFXXX',
                'accountHolder' => 'Max Mustermann',
                'mandateReference' => 'MNDT-123456789',
                'signingDate' => '2021-01-01',
                'type' => 'CORE',
                'sequence' => 'FRST'
        ],
        'goCardless' => [
                'customerId' => 'CU123456789',
                'mandateId' => 'MD123456789'
        ],
        'redirectUrl' => 'https://example.com/checkout/confirm'
    ],
    'paymentMethodId' => 'https://example.com/'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

{
  "action": "redirect",
  "redirectUrl": "<string>",
  "status": "open",
  "confirmationMessage": "<string>"
}