curl --request POST \
  --url https://app.base44.com/api/apps/{app_id}/payments/analytics/transactions/{transaction_id}/refund \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 1000,
  "note": "Customer returned one item.",
  "idempotency_key": "refund-2026-08-25-7f3c9a"
}
'

import requests

url = "https://app.base44.com/api/apps/{app_id}/payments/analytics/transactions/{transaction_id}/refund"

payload = {
    "amount": 1000,
    "note": "Customer returned one item.",
    "idempotency_key": "refund-2026-08-25-7f3c9a"
}
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: 1000,
    note: 'Customer returned one item.',
    idempotency_key: 'refund-2026-08-25-7f3c9a'
  })
};

fetch('https://app.base44.com/api/apps/{app_id}/payments/analytics/transactions/{transaction_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://app.base44.com/api/apps/{app_id}/payments/analytics/transactions/{transaction_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' => 1000,
    'note' => 'Customer returned one item.',
    'idempotency_key' => 'refund-2026-08-25-7f3c9a'
  ]),
  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://app.base44.com/api/apps/{app_id}/payments/analytics/transactions/{transaction_id}/refund"

	payload := strings.NewReader("{\n  \"amount\": 1000,\n  \"note\": \"Customer returned one item.\",\n  \"idempotency_key\": \"refund-2026-08-25-7f3c9a\"\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://app.base44.com/api/apps/{app_id}/payments/analytics/transactions/{transaction_id}/refund")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"amount\": 1000,\n  \"note\": \"Customer returned one item.\",\n  \"idempotency_key\": \"refund-2026-08-25-7f3c9a\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.base44.com/api/apps/{app_id}/payments/analytics/transactions/{transaction_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\": 1000,\n  \"note\": \"Customer returned one item.\",\n  \"idempotency_key\": \"refund-2026-08-25-7f3c9a\"\n}"

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

{
  "transaction_id": "ch_T7mK2p9Q4r6S8v",
  "status": "partially_refunded",
  "payment_type": "one_time",
  "created_date": "2026-08-25T10:00:00Z",
  "currency": "USD",
  "amount": 2500,
  "fee": 103,
  "net": 2397,
  "service_fee": 50,
  "refunded_amount": 1000,
  "refunds": [
    {
      "amount": 1000,
      "created_date": "2026-08-26T09:15:00Z",
      "id": "re_T7mK2p9Q4r6S8v",
      "status": "succeeded"
    }
  ],
  "method_kind": "card",
  "method_moto": false,
  "card_network": "visa",
  "card_masked": "4242",
  "card_holder": "Jane Doe",
  "provider_id": "stripe",
  "merchant_account_id": "4f1c2a7e-9b3d-4e8f-a6c5-2d7e9f0b1a3c",
  "display_order_id": "10042",
  "items": [
    {
      "amount": 2500,
      "name": "Oak side table",
      "quantity": 1
    }
  ],
  "billing": {
    "address": "500 Terry Francine St",
    "city": "San Francisco",
    "country_code": "US",
    "email": "jane@example.com",
    "name": "Jane Doe",
    "phone": "+14155550123",
    "postal_code": "94158",
    "state": "CA"
  },
  "shipping": {
    "address": "500 Terry Francine St",
    "city": "San Francisco",
    "country_code": "US",
    "name": "Jane Doe",
    "phone": "+14155550123",
    "postal_code": "94158",
    "state": "CA"
  },
  "disputes": [],
  "history": [
    {
      "date": "2026-08-26T09:15:00Z",
      "kind": "refund",
      "lines": [
        {
          "amount": 1000,
          "label": "refunded_amount"
        }
      ],
      "status": "succeeded"
    },
    {
      "date": "2026-08-25T10:00:00Z",
      "kind": "payment",
      "lines": [
        {
          "amount": 2500,
          "label": "amount"
        },
        {
          "amount": -103,
          "label": "processing_fee"
        },
        {
          "amount": 2397,
          "label": "net"
        }
      ],
      "status": "succeeded"
    }
  ],
  "decline_reason": "Your card has insufficient funds."
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}