curl --request GET \
  --url https://api.example.com/v1/transactions/{id} \
  --header 'x-api-key: <api-key>'

import requests

url = "https://api.example.com/v1/transactions/{id}"

headers = {"x-api-key": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {'x-api-key': '<api-key>'}};

fetch('https://api.example.com/v1/transactions/{id}', 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://api.example.com/v1/transactions/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "x-api-key: <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"
	"net/http"
	"io"
)

func main() {

	url := "https://api.example.com/v1/transactions/{id}"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("x-api-key", "<api-key>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.example.com/v1/transactions/{id}")
  .header("x-api-key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/v1/transactions/{id}")

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

request = Net::HTTP::Get.new(url)
request["x-api-key"] = '<api-key>'

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

{
  "status": true,
  "transaction": {
    "action": "SALE",
    "amount": "12.30",
    "createdAt": "2026-10-11T10:00:00.000Z",
    "currency": "EUR",
    "errorCode": "PSP_OUTCOME_UNKNOWN",
    "id": "tr_example",
    "livemode": true,
    "orderId": "order_example_001",
    "processingAmount": "12.30",
    "processingCurrency": "EUR",
    "status": "PROCESSING"
  }
}

{
  "message": "Invalid API key",
  "error": "Unauthorized",
  "errorCode": "API_KEY_ROTATION_REQUIRED",
  "statusCode": 401
}

{
  "error": "Not Found",
  "message": "Transaction not found",
  "statusCode": 404
}

{
  "error": "RATE_LIMITED",
  "errorCode": "RATE_LIMITED",
  "message": "Too many requests. Retry after the indicated delay.",
  "status": false,
  "statusCode": 429
}

{
  "error": "DUPLICATE_ORDER_ID",
  "errorCode": "DUPLICATE_ORDER_ID",
  "message": "A transaction with orderId \"A-1001\" already exists for this merchant",
  "status": false,
  "statusCode": 409,
  "existingTransactionId": "tr_x8k2p0q5scocndpejk0nud75q",
  "fields": [
    "customer.email",
    "customer.country"
  ],
  "idempotencyKey": "0b6f2c1e-4c7a-4a43-9a51-6a4b1d7e9f10",
  "orderId": "A-1001"
}

{
  "error": "Service Unavailable",
  "message": "API_KEY_VALIDATION_UNAVAILABLE",
  "statusCode": 503
}

{
  "error": "DUPLICATE_ORDER_ID",
  "errorCode": "DUPLICATE_ORDER_ID",
  "message": "A transaction with orderId \"A-1001\" already exists for this merchant",
  "status": false,
  "statusCode": 409,
  "existingTransactionId": "tr_x8k2p0q5scocndpejk0nud75q",
  "fields": [
    "customer.email",
    "customer.country"
  ],
  "idempotencyKey": "0b6f2c1e-4c7a-4a43-9a51-6a4b1d7e9f10",
  "orderId": "A-1001"
}