curl --request POST \
  --url https://conta-public-api.kiwify.com/v1/refunds \
  --header 'Content-Type: application/json' \
  --header 'X-PoP-Challenge: <api-key>' \
  --header 'X-PoP-Format: <api-key>' \
  --header 'X-PoP-Signature: <api-key>' \
  --header 'x-access-id: <api-key>' \
  --data '
{
  "amount_in_cents": 15000,
  "external_reference_id": "refund-001",
  "message_to_payer": "Devolução parcial",
  "transaction_id": 123456789
}
'

import requests

url = "https://conta-public-api.kiwify.com/v1/refunds"

payload = {
    "amount_in_cents": 15000,
    "external_reference_id": "refund-001",
    "message_to_payer": "Devolução parcial",
    "transaction_id": 123456789
}
headers = {
    "x-access-id": "<api-key>",
    "X-PoP-Challenge": "<api-key>",
    "X-PoP-Format": "<api-key>",
    "X-PoP-Signature": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'x-access-id': '<api-key>',
    'X-PoP-Challenge': '<api-key>',
    'X-PoP-Format': '<api-key>',
    'X-PoP-Signature': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    amount_in_cents: 15000,
    external_reference_id: 'refund-001',
    message_to_payer: 'Devolução parcial',
    transaction_id: 123456789
  })
};

fetch('https://conta-public-api.kiwify.com/v1/refunds', 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://conta-public-api.kiwify.com/v1/refunds",
  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_in_cents' => 15000,
    'external_reference_id' => 'refund-001',
    'message_to_payer' => 'Devolução parcial',
    'transaction_id' => 123456789
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-PoP-Challenge: <api-key>",
    "X-PoP-Format: <api-key>",
    "X-PoP-Signature: <api-key>",
    "x-access-id: <api-key>"
  ],
]);

$response = curl_exec($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://conta-public-api.kiwify.com/v1/refunds"

	payload := strings.NewReader("{\n  \"amount_in_cents\": 15000,\n  \"external_reference_id\": \"refund-001\",\n  \"message_to_payer\": \"Devolução parcial\",\n  \"transaction_id\": 123456789\n}")

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

	req.Header.Add("x-access-id", "<api-key>")
	req.Header.Add("X-PoP-Challenge", "<api-key>")
	req.Header.Add("X-PoP-Format", "<api-key>")
	req.Header.Add("X-PoP-Signature", "<api-key>")
	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://conta-public-api.kiwify.com/v1/refunds")
  .header("x-access-id", "<api-key>")
  .header("X-PoP-Challenge", "<api-key>")
  .header("X-PoP-Format", "<api-key>")
  .header("X-PoP-Signature", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"amount_in_cents\": 15000,\n  \"external_reference_id\": \"refund-001\",\n  \"message_to_payer\": \"Devolução parcial\",\n  \"transaction_id\": 123456789\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://conta-public-api.kiwify.com/v1/refunds")

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

request = Net::HTTP::Post.new(url)
request["x-access-id"] = '<api-key>'
request["X-PoP-Challenge"] = '<api-key>'
request["X-PoP-Format"] = '<api-key>'
request["X-PoP-Signature"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"amount_in_cents\": 15000,\n  \"external_reference_id\": \"refund-001\",\n  \"message_to_payer\": \"Devolução parcial\",\n  \"transaction_id\": 123456789\n}"

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

{
  "created_at": "2026-05-28T14:30:00Z",
  "details": {
    "amount_in_cents": 123,
    "message_to_payer": "<string>"
  },
  "id": 123,
  "transaction_id": 123,
  "updated_at": "2026-05-28T14:30:00Z",
  "beneficiary": {
    "pix_key": "<string>",
    "resolved_account_number": "<string>",
    "resolved_branch": "<string>",
    "resolved_ispb": "<string>",
    "name": "<string>",
    "tax_id": "<string>"
  },
  "cancelled_at": "2026-05-28T14:30:00Z",
  "external_reference_id": "<string>"
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "<string>",
    "details": {}
  },
  "timestamp": "2026-05-28T14:30:00Z"
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "<string>",
    "details": {}
  },
  "timestamp": "2026-05-28T14:30:00Z"
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "<string>",
    "details": {}
  },
  "timestamp": "2026-05-28T14:30:00Z"
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "<string>",
    "details": {}
  },
  "timestamp": "2026-05-28T14:30:00Z"
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "<string>",
    "details": {}
  },
  "timestamp": "2026-05-28T14:30:00Z"
}