Webhook Testing · HTTP · Webhook Inspector · Mock Webhook Endpoint
Test Webhooks Without Losing the Payload When Something Breaks
Zunoy Webhook Inbox is a permanent, authenticated mock webhook endpoint and webhook inspector for development and staging teams. Every payload your services fire lands here — fully inspectable, team-shared, and available long after the session ends. No more lost payloads. No more debugging blind. No more ngrok tunnels that disappear when someone closes their laptop.
Works with Stripe · GitHub · Shopify · Discord · Slack · Microsoft Teams · Any HTTP client
If you're looking for any of these, this page is for you
Zunoy Webhook Inbox is an authenticated mock webhook endpoint and webhook inspector — every payload captured permanently, full payload visible, shared across your entire team in real time.
Webhooks fail silently. By the time you look, the payload is gone.
The Payload Disappears the Moment Something Breaks
Your webhook handler threw an error. By the time you opened the logs, the payload was gone. No body. No headers. No timestamp. Nothing to inspect — so you're guessing what Stripe actually sent. A webhook inspector would have shown you everything. You had a log and a stack trace.
Your Team Can't Debug Together
The payload landed in one developer's local ngrok tunnel. Nobody else on the team saw it. QA can't verify it. When the laptop closes, it's gone. Webhook debugging shouldn't depend on who had the right terminal open at the right moment.
Testing Platform Webhooks Requires the Real Platform
To test a Discord webhook, you need a real Discord server, a real bot, a real channel — just to validate a JSON structure. An hour of setup for a five-minute fix. A mock webhook endpoint purpose-built for platform testing eliminates the entire dependency.
A permanent mock webhook endpoint your whole team shares. Every payload inspectable from the moment it arrives.
Permanent, authenticated mock webhook endpoint
Create a project in Sandbox and get a unique, authenticated webhook URL — your mock webhook endpoint for this service in staging. Point any service at it. Every payload lands and stays permanently. Unlike ngrok tunnels or throwaway URLs, this endpoint requires auth, retains every payload, and is shared with your whole team. Your webhook testing tool that works the way a production endpoint should — minus the handler.
Full webhook inspector — nothing hidden
Every incoming webhook shows HTTP method, full request headers, query parameters, raw body, timestamp, and the response code Sandbox returned. Debug every detail of every payload in one webhook inspector view — no abstraction, no sanitised logs, no guessing. Exactly what your service sent.
Platform-specific payload validation
Create a Discord, Slack, or Microsoft Teams project and Sandbox validates incoming payloads against the platform's expected structure. Malformed payloads are rejected with a specific reason. Test Discord and Slack integrations without a real server, a real bot, or a real workspace.
Share any payload with one link
Generate a read-only public link for any received payload. Share it with a teammate or stakeholder — they see the full webhook inspector view without needing a Sandbox account. Useful for async debugging when not everyone is online simultaneously.
Ready to test safely? Start your
free sandbox in under 60 seconds.
One Single Tool for - Email + SMS + Webhook + TOTP
Maintain customer trust - Test Alerts before your Users do
Setup under 5 minutes
Real human support by Zunoy Team
Set up your mock webhook endpoint and start inspecting payloads in under 2 minutes.
Create a project and get your mock webhook endpoint
Create a webhook project in Sandbox. You get a unique authenticated URL — your mock webhook endpoint for this service. Each project is isolated with its own token and its own inbox. Point one project at Stripe. Another at GitHub. Another at your internal microservices.
Point your service at the Sandbox endpoint
In Stripe, GitHub, or your internal service config, swap the webhook destination URL to your Sandbox endpoint. One config change. Same payload. Same headers. Your service now fires to your mock webhook endpoint instead of a real handler.
Trigger the event
Developer triggers a payment, a push, or any event that fires a webhook. The service sends the payload to Sandbox. No handler required. No running server needed.
Team inspects the payload in the webhook inspector
Full payload appears in your inbox — HTTP method, headers, body, query params, timestamp, response code. Every team member sees it simultaneously in the shared webhook inspector. QA validates structure against expected values. DevOps checks headers. Backend confirms event type.
Issue found, fixed, re-triggered
Developer fixes the handler logic or payload structure. Triggers the event again. New payload lands in the webhook inspector. QA confirms the fix. Payload link shared for sign-off.
Drop-in mock webhook endpoint. Any HTTP client. One environment variable.
Replace your real webhook destination URL with your Sandbox endpoint. Same payload, same headers, same auth structure — now pointing at a permanent webhook inspector instead of a real handler.
This is a drop-in mock webhook endpoint — replace your real destination URL in your staging config. Same payload. Same headers. Every request lands in your webhook inspector permanently.
curl -X POST "https://webhook.zunoy.com/project/hooks/events" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_PROJECT_TOKEN" \
-d '{
"event": "payment.completed",
"order_id": "ord_1094",
"amount": 4999
}'Every other webhook testing tool leaves a critical gap.
ngrok tunnels
Session-only. Payload gone when the tunnel closes. One developer sees it — nobody else. Not a permanent mock webhook endpoint — a temporary port forward.
Console logging
You know the webhook fired. You don't know what it contained, whether headers were correct, or whether the payload structure was valid. Not a webhook inspector — just a confirmation.
Throwaway URL tools like Webhook.site
No authentication. No team sharing. No payload retention beyond the session. No platform validation. A scratchpad for one developer — not a webhook testing tool for a team.
Building an internal mock webhook endpoint
Engineering overhead. Maintenance cost. Still doesn't give you team sharing, payload retention, platform validation, or a shareable webhook inspector.
Zunoy Webhook Inbox is an authenticated mock webhook endpoint and webhook inspector — permanent payloads, team-shared inbox, platform validation, and public payload links. Built for teams, not just individual developers.
BUILT FOR
Who uses Sandbox for webhook testing
Backend developers
Get a permanent authenticated mock webhook endpoint for every service in staging. Every payload lands in your webhook inspector — method, headers, body, response code — without a running handler. Debug webhook integrations without a live server.
DevOps engineers
Monitor webhook events from every service in one webhook inspector. Share payload links with the team without screen-sharing or log forwarding. One place to see what every service is firing.
QA engineers
Validate that the right webhooks fired — right method, right body, right headers — using a shared webhook inspector your whole team sees simultaneously. No ngrok. No coordination with the developer who has the tunnel open.
Other testing scenarios covered by Sandbox
Transactional email testing
Capture, preview, and score every transactional email before it reaches a real user.
SMS OTP testing
Test SMS delivery and OTP codes in staging without sending to a real phone.
OTP / 2FA testing
Generate and verify TOTP codes in staging without real authenticator apps.
The things developers ask about Webhook Testing
What is a mock webhook endpoint and how does Sandbox work as one?
A mock webhook endpoint is a URL that accepts HTTP requests from any service — without forwarding them to a real handler. Zunoy Webhook Inbox acts as your mock webhook endpoint in staging — receiving every payload your services fire, logging the full request including method, headers, body, and timestamp, and making it instantly available to your team in a shared webhook inspector. Permanent, authenticated, and team-shared by default.
How do I use Sandbox as a webhook testing tool for my team?
Create a webhook project in Sandbox and get your unique authenticated URL. Replace your real webhook destination with your Sandbox endpoint in your staging config. Every payload your service fires lands in your shared webhook inspector — visible to your entire team simultaneously, retained beyond the session. No ngrok. No throwaway URLs. No lost payloads.
Can I use Sandbox to debug webhook payloads from Stripe or GitHub?
Yes. Point your Stripe or GitHub webhook destination at your Sandbox endpoint in staging. Every event — payment_intent.succeeded, push, pull_request — lands in your webhook inspector with the full payload visible. Debug webhook payloads from Stripe, GitHub, Shopify, or any other HTTP source. See Webhook Inbox for details.
Is the webhook endpoint authenticated?
Yes. Every Sandbox webhook endpoint is a mock webhook endpoint that requires an Authorization token on every request. Unauthenticated requests are rejected immediately — no open URLs, no accidental public exposure. See Webhook Inbox for details.
Can I test Discord, Slack, and Teams webhooks without a real server?
Yes. Create a project with the platform type — Discord, Slack, or Teams. Sandbox validates incoming payloads against the platform's expected structure and rejects malformed payloads with a specific reason. Test platform integrations using your mock webhook endpoint — no real server, bot, or workspace required.
Every Testing Scenario, One Sandbox Workspace
Your app sends emails, SMS, webhooks, and TOTP codes. Sandbox handles all four — in one workspace, under one account, visible to your whole team.
Email Inbox
SMS Inbox
Webhook Inbox
TOTP Inbox
Sandbox
Test Email, SMS, Webhooks & 2FA codes without touching production.
Operational
Contact Us On
Mail Us
support@zunoy.comCopyright © 2026 - Mentcube Innovations Pvt Ltd.. All Rights Reserved.