I built a webhook testing tool with 80+ testing guides — here's how

#webdev #api #javascript #opensource

Building webhook integrations is painful. You set up a test URL, it expires, payloads disappear, and you're left guessing what went wrong.

So I built HookRay — a webhook testing and debugging tool.

What it does

Instant webhook URLs — create a test endpoint in one click, no signup required
Real-time inspection — see every incoming request with parsed JSON payloads
Search & filter — find requests by HTTP method, time range, or body content
Replay — re-send any captured webhook to a target URL for debugging
Team sharing — collaborate with your team on shared endpoints

The tech stack

Next.js 16 (App Router) + React 19
Supabase for auth and PostgreSQL
Stripe for subscription billing
Vercel for deployment
Claude API for AI-powered features

80+ webhook testing guides

I created step-by-step guides for testing webhooks from popular services:

Each guide covers event types, sample payloads, and common debugging tips.

9 APIs on RapidAPI

Beyond the webhook tool, I built a portfolio of developer APIs:

AI SEO Meta Tag Generator — generate optimized meta tags from any URL (try it)
Web Page Summarizer — summarize any page in up to 5 languages simultaneously (try it)
QR Code Generator, Screenshot API, HTML to PDF, Email Validation, and more

Lessons learned

Building is the easy part. I shipped everything in ~2 weeks using AI coding tools. Getting users is 10x harder.
SEO takes patience. 116 pages, proper sitemaps, JSON-LD — and Google has indexed only a handful so far.
Distribution > Product. No one will use your tool if they can't find it.

I'm a solo developer from Japan, trying to build side income from developer tools. Would love feedback or advice from anyone who's done this successfully.

👉 hookray.com