Catchhook

Webhook Guides

Practical guides for testing, debugging, and securing webhooks from real development workflows.

Provider Setup

Debugging Slack App Events, Commands, and Interactivity

A practical Slack Request URL guide covering Events API URL verification, signing secrets, retries, three-second acknowledgments, slash commands, interactivity, tunnels, replay, Actions, and MCP.

|7 min read

Setting Up and Debugging Shopify Webhooks

A practical guide to Shopify HTTPS webhooks: topic subscriptions, raw-body HMAC verification, delivery identity, API versions, safe replay, localhost tunnels, Actions, and MCP diagnostics.

|5 min read

How to Debug Stripe Webhooks

End-to-end Stripe webhook debugging: endpoint setup, signature verification, API version gotchas, event identity, tunnel workflows, and common failure patterns.

|6 min read

Framework Implementation

Webhook Signature Verification

How HMAC signatures protect webhooks, with raw-body verification, timing-safe comparison, timestamp tolerance, and Stripe/GitHub implementation examples.

|5 min read

Webhook Retries and Idempotency

How to handle at-least-once delivery, build idempotent handlers, manage provider retry behavior, and recover safely from failures.

|6 min read

Debugging Failures

How to Test Webhooks Locally

Two approaches to local webhook development — catch-and-inspect and live tunneling — with CLI setup, signature handling, and common failure fixes.

|5 min read

Repeatable Testing

Agentic Webhook Testing with MCP

Use CatchHook's MCP server from Claude Code, Cursor, or Windsurf to create endpoints, wait for traffic, inspect payloads, diagnose failures, and compare events — all from your editor.

|6 min read