HookRelay

Capture, inspect, and replay webhooks in real-time.

Features

• Instant endpoints — One click, no signup required
• Real-time streaming — See webhooks arrive via Server-Sent Events
• Full inspection — Headers, body, query params, IP, timing
• Replay — Forward captured webhooks to localhost or any URL
• Request history — Last 100 requests per endpoint

Quick Start

# Run locally
go run .

# Or with Docker
docker build -t hookrelay .
docker run -p 8080:8080 -v hookrelay-data:/data hookrelay

Then open http://localhost:8080 and click "Create Endpoint".

API

Create endpoint (no auth)

curl -X POST https://hookrelay.fly.dev/api/quick
# Returns: { endpoint: { id: "abc123" }, api_key: "hk_...", hook_url: "/hook/abc123" }

Send a webhook

curl -X POST https://hookrelay.fly.dev/hook/abc123 \
  -H "Content-Type: application/json" \
  -d '{"event":"order.created"}'

View requests

curl https://hookrelay.fly.dev/api/endpoints/abc123/requests

Real-time stream (SSE)

curl -N https://hookrelay.fly.dev/api/endpoints/abc123/stream

Replay a request

curl -X POST https://hookrelay.fly.dev/api/requests/{request-id}/replay \
  -H "Content-Type: application/json" \
  -d '{"url":"http://localhost:3000/webhook"}'

Deploy

fly launch
fly volumes create hookrelay_data --region sin --size 1
fly deploy

Pricing

Plan	Price	Endpoints	History	Retention
Free	$0	1	100 requests	24 hours
Pro	$9/mo	10	Unlimited	30 days
Team	$29/mo	50	Unlimited	90 days

License

MIT