Create refund for checkout session

import requests
import json

url = "https://api.example.com/api/v1/sessions/6a2fca3f-fffd-4f3a-8eaf-11af4e21aa7b/refunds"
headers = {
  "Content-Type": "application/json",
  "Idempotency-Key": "example_string",
  "Authorization": "Bearer YOUR_API_TOKEN (JWT)"
}
data = {
  "amount": 45.01,
  "reason": "REQUESTED_BY_CUSTOMER",
  "lineItems": [
    {
      "name": "Wireless Headphones",
      "sku": "WH-100",
      "quantity": 1,
      "unitPrice": 119
    }
  ]
}

response = requests.post(url, headers=headers, json=data)
print(response.json())

const response = await fetch("https://api.example.com/api/v1/sessions/6a2fca3f-fffd-4f3a-8eaf-11af4e21aa7b/refunds", {
  method: "POST",
  headers: {
  "Content-Type": "application/json",
  "Idempotency-Key": "example_string",
  "Authorization": "Bearer YOUR_API_TOKEN (JWT)"
},
  body: JSON.stringify({
  "amount": 45.01,
  "reason": "REQUESTED_BY_CUSTOMER",
  "lineItems": [
    {
      "name": "Wireless Headphones",
      "sku": "WH-100",
      "quantity": 1,
      "unitPrice": 119
    }
  ]
})
});

const data = await response.json();
console.log(data);

package main

import (
    "fmt"
    "net/http"
    "bytes"
    "encoding/json"
)

func main() {
    data := []byte(`{
  "amount": 45.01,
  "reason": "REQUESTED_BY_CUSTOMER",
  "lineItems": [
    {
      "name": "Wireless Headphones",
      "sku": "WH-100",
      "quantity": 1,
      "unitPrice": 119
    }
  ]
}`)

    req, err := http.NewRequest("POST", "https://api.example.com/api/v1/sessions/6a2fca3f-fffd-4f3a-8eaf-11af4e21aa7b/refunds", bytes.NewBuffer(data))
    if err != nil {
        panic(err)
    }

    req.Header.Set("Content-Type", "application/json")
    req.Header.Set("Idempotency-Key", "example_string")
    req.Header.Set("Authorization", "Bearer YOUR_API_TOKEN (JWT)")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    fmt.Println("Response Status:", resp.Status)
}

require 'net/http'
require 'json'

uri = URI('https://api.example.com/api/v1/sessions/6a2fca3f-fffd-4f3a-8eaf-11af4e21aa7b/refunds')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request['Idempotency-Key'] = 'example_string'
request['Authorization'] = 'Bearer YOUR_API_TOKEN (JWT)'
request.body = '{
  "amount": 45.01,
  "reason": "REQUESTED_BY_CUSTOMER",
  "lineItems": [
    {
      "name": "Wireless Headphones",
      "sku": "WH-100",
      "quantity": 1,
      "unitPrice": 119
    }
  ]
}'

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

{
  "refundId": "3d72f30c-2977-44bf-b2e8-ff09b9b3216d",
  "sessionId": "6a2fca3f-fffd-4f3a-8eaf-11af4e21aa7b",
  "status": "PENDING",
  "amount": 45.01,
  "currency": "USD",
  "reason": "REQUESTED_BY_CUSTOMER",
  "failureReason": "PAYMENT_FAILED",
  "createdAt": "2026-04-24T12:30:00.000Z"
}

{
  "error": "Bad Request",
  "message": "Missing required header: Idempotency-Key",
  "statusCode": 400
}

{
  "error": "Bad Request",
  "message": [
    "amount must not be less than 0.01"
  ],
  "statusCode": 400
}

{
  "error": "Unauthorized",
  "message": "Authentication required. Please provide a valid API token",
  "code": 401
}

{
  "error": "Not Found",
  "message": "The requested resource was not found",
  "code": 404
}

{
  "error": "Conflict",
  "message": "The request conflicts with the current state of the resource",
  "code": 409,
  "details": "Resource already exists"
}

{
  "message": "This idempotency key was already used with different request parameters",
  "statusCode": 422,
  "code": "IDEMPOTENCY_KEY_MISMATCH"
}

{
  "message": "Session is not in a refundable state",
  "statusCode": 422
}

{
  "message": "Requested amount exceeds remaining refundable balance",
  "statusCode": 422
}

{
  "error": "Internal Server Error",
  "message": "An unexpected error occurred on the server",
  "code": 500,
  "requestId": "req_1234567890"
}

{
  "message": "Bad Gateway",
  "statusCode": 502
}

{
  "error": "Error",
  "message": "Request timed out.",
  "code": 504
}