curl --request POST \
  --url https://business.coinbase.com/api/v1/checkouts/{id}/refund \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": "25.00",
  "currency": "USDC",
  "reason": "Customer requested refund"
}
'

import requests

url = "https://business.coinbase.com/api/v1/checkouts/{id}/refund"

payload = {
    "amount": "25.00",
    "currency": "USDC",
    "reason": "Customer requested refund"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({amount: '25.00', currency: 'USDC', reason: 'Customer requested refund'})
};

fetch('https://business.coinbase.com/api/v1/checkouts/{id}/refund', 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://business.coinbase.com/api/v1/checkouts/{id}/refund",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'amount' => '25.00',
    'currency' => 'USDC',
    'reason' => 'Customer requested refund'
  ]),
  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;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://business.coinbase.com/api/v1/checkouts/{id}/refund"

	payload := strings.NewReader("{\n  \"amount\": \"25.00\",\n  \"currency\": \"USDC\",\n  \"reason\": \"Customer requested refund\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://business.coinbase.com/api/v1/checkouts/{id}/refund")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"amount\": \"25.00\",\n  \"currency\": \"USDC\",\n  \"reason\": \"Customer requested refund\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://business.coinbase.com/api/v1/checkouts/{id}/refund")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"amount\": \"25.00\",\n  \"currency\": \"USDC\",\n  \"reason\": \"Customer requested refund\"\n}"

response = http.request(request)
puts response.read_body

{
  "checkout": {
    "id": "68f7a946db0529ea9b6d3a12",
    "uuid": "550e8400-e29b-41d4-a716-446655440000",
    "url": "https://payments.coinbase.com/payment-links/pl_01h8441j23abcd1234567890ef",
    "amount": "100.50",
    "currency": "USDC",
    "network": "base",
    "address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
    "createdAt": "2024-03-20T10:30:00Z",
    "updatedAt": "2024-03-20T10:30:00Z",
    "status": "ACTIVE",
    "tokenAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "description": "Payment for order #12345",
    "expiresAt": "2024-03-20T10:30:00Z",
    "metadata": {
      "invoiceId": "12345",
      "reference": "Payment for invoice #12345",
      "customerId": "cust_abc123"
    },
    "successRedirectUrl": "https://example.com/success",
    "failRedirectUrl": "https://example.com/failed",
    "settlement": {
      "totalAmount": "100.00",
      "feeAmount": "1.25",
      "netAmount": "98.75",
      "currency": "USDC"
    },
    "fiatAmount": "100.00",
    "fiatCurrency": "USD",
    "transactionHash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "refundedAmount": "25.00",
    "businessDisplayName": "Acme Corporation",
    "refunds": [
      {
        "id": "<string>",
        "checkoutId": "<string>",
        "amount": "<string>",
        "status": "PENDING",
        "createdAt": "2024-03-20T10:30:00Z",
        "currency": "USDC",
        "reason": "<string>",
        "transactionHash": "<string>",
        "completedAt": "2024-03-20T10:30:00Z",
        "fiatAmount": "<string>",
        "fiatCurrency": "<string>",
        "exchangeRate": "<string>"
      }
    ],
    "x402_url": "https://api.cdp.coinbase.com/platform/v2/payment-sessions/paymentSession_82c879c1-84e1-44ed-a8c2-1ac239cf09ad/authorizations/x402"
  },
  "refund": {
    "id": "<string>",
    "checkoutId": "<string>",
    "amount": "<string>",
    "status": "PENDING",
    "createdAt": "2024-03-20T10:30:00Z",
    "currency": "USDC",
    "reason": "<string>",
    "transactionHash": "<string>",
    "completedAt": "2024-03-20T10:30:00Z",
    "fiatAmount": "<string>",
    "fiatCurrency": "<string>",
    "exchangeRate": "<string>"
  }
}

{
  "errorType": "invalid_request",
  "errorMessage": "Invalid request parameters."
}

{
  "errorType": "unauthorized",
  "errorMessage": "The request is not properly authenticated."
}

{
  "errorType": "forbidden",
  "errorMessage": "User forbidden from performing the action."
}

{
  "errorType": "not_found",
  "errorMessage": "The requested resource was not found."
}

{
  "errorType": "invalid_request",
  "errorMessage": "Invalid request.",
  "correlationId": "41deb8d59a9dc9a7-IAD"
}

{
  "errorType": "invalid_request",
  "errorMessage": "request body exceeds the maximum allowed size of 262144 bytes"
}

{
  "errorType": "rate_limit_exceeded",
  "errorMessage": "Rate limit exceeded."
}

{
  "errorType": "internal_server_error",
  "errorMessage": "An internal server error occurred. Please try again later."
}

{
  "errorType": "invalid_request",
  "errorMessage": "Invalid request.",
  "correlationId": "41deb8d59a9dc9a7-IAD"
}