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What is Hookmetry?

Hookmetry Webhook Inspection Dashboard — real-time payload and signature view
Hookmetry webhook telemetry dashboard — inspect payloads, headers, and signatures in real time

Hookmetry is a production-grade webhook debugger, tester, and monitoring platform built for developers who integrate Stripe, GitHub, Clerk, Shopify, Razorpay, Svix, and other event-driven APIs. It captures every incoming webhook request — including headers, raw payload bytes, and signature values — and lets you inspect, replay, and validate them without touching your production code.

Unlike traditional logging, Hookmetry gives you structural visibility into what your webhook provider actually sent vs. what your server received. This distinction matters when debugging HMAC signature mismatches, raw body corruption, and timing-tolerance errors — the three most common failure modes in webhook integrations.

Core Platform Features

Real-time Webhook Capture: Generate a unique endpoint URL and receive webhook events instantly. Every request is logged with full headers, raw body bytes, query params, timestamps, and response codes — no configuration required.
HMAC Signature Validation: Automatic signature verification for Stripe (stripe-signature), GitHub (X-Hub-Signature-256), Shopify, Razorpay, Svix/Clerk, Twilio, and custom HMAC implementations. Diagnose raw body corruption, encoding mismatches, and secret misconfigurations immediately.
Webhook Replay to Localhost: Re-send any captured event to your local development server using the Hookmetry CLI tunnel — without Ngrok or any port-forwarding setup. Test your handler against production payloads without waiting for the provider to re-send.
Structural Reconstruction Engine: Hookmetry detects and explains structural anomalies — JSON key reordering, whitespace stripping, charset encoding differences — that cause signature validation to fail even when the secret is correct. This is the hardest class of webhook bugs to diagnose manually.
Observability & Metrics: Track delivery success rates, failure patterns, response time distributions, and retry counts across your webhook endpoints. Share debug sessions with teammates and track trends over time.

How Hookmetry Compares to Alternatives

FeatureHookmetryWebhook.siteRequestBin
Signature validation✓ Automatic✗✗
Replay to localhost✓ CLI tunnel✗✗
Structural anomaly detection✓✗✗
Free to start✓ No signup✓✓
Team observability✓ Paid plansLimited✗

Who Uses Hookmetry?

Backend Developers

Debugging Stripe payment webhook handlers, Clerk auth event processing, and GitHub CI/CD pipelines without modifying production config.

Full-Stack Teams

Sharing webhook debug sessions across frontend and backend engineers. Replaying failed events during incident review without waiting for a new production trigger.

DevOps & SRE

Monitoring webhook delivery rates, tracking retry anomalies, and setting up alerts for signature mismatch spikes in production webhook infrastructure.

AI / LLM Engineers

Capturing and debugging OpenAI model callbacks, Pinecone async responses, and custom AI workflow event systems where payload schemas evolve rapidly.

🚀 Get Started in 2 Minutes — No Signup Required

Visit hookmetry.com/webhook-tester to generate a free endpoint URL, send a test webhook from Stripe or GitHub, and inspect the full payload and signature in real time. No credit card, no account needed.

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