Webhook Testing Guide

What is a Webhook?

A webhook is a method of event-driven communication where one system notifies another when a specific event occurs. It sends real-time HTTP POST requests to a configured URL.

How Webhooks Work

Event occurs in the source system.
Webhook is triggered, sending an HTTP request.
Data is transmitted in JSON/XML format.
Receiving system processes the data.

Testing Webhooks

1. Using Postman

POST https://your-webhook-url.com
Headers:
    Content-Type: application/json
Body:
{
    "event": "user_signup",
    "user_id": 12345,
    "email": "test@example.com"
}

2. Using RequestBin

Visit RequestBin, create a bin, and configure the webhook to send requests to the generated URL.

3. Testing with Ngrok

# Install and run Ngrok
grok http 5000

4. Using cURL

curl -X POST "https://your-webhook-url.com" \
-H "Content-Type: application/json" \
-d '{"event":"payment_success", "transaction_id":78945, "amount":100.50}'

5. Automated Testing with Rest Assured (Java)

import io.restassured.RestAssured;
import io.restassured.response.Response;
import org.testng.Assert;
import org.testng.annotations.Test;
import static io.restassured.RestAssured.given;

public class WebhookTest {
    @Test
    public void testWebhook() {
        RestAssured.baseURI = "https://your-webhook-url.com";

        String requestBody = "{ \"event\": \"order_created\", \"order_id\": 1234, \"status\": \"confirmed\" }";

        Response response = given()
            .header("Content-Type", "application/json")
            .body(requestBody)
            .when()
            .post("/webhook-endpoint")
            .then()
            .extract().response();

        Assert.assertEquals(response.getStatusCode(), 200);
    }
}

Summary

Method	Use Case
Postman	Manually send test webhook requests.
RequestBin	Capture and inspect incoming webhook requests.
Ngrok	Test webhooks locally by exposing your server online.
cURL	Send test requests via command line.
Rest Assured	Automate webhook API testing using Java.

Demo Website

Visit Webhook.site to test and debug webhook requests easily.

Visit Beeceptor to create mock endpoints and test webhooks.