A free RequestBin alternative — no signup
Need a quick bin to catch and inspect HTTP requests? Catchr gives you a throwaway capture URL instantly — no account, no dashboard to set up — with a clean JSON API on top.
Docs- Instant & anonymous.
POST /api/binsreturns a live URL and token. Nothing to sign up for. - API-first. Create, capture, read, clear and delete are all plain HTTP calls — ideal for automated tests and AI agents, not just manual clicking.
- Inbound-only & safe. Catchr never forwards or originates requests, so it can't be abused as a relay.
- Free. No paywall on inspecting your own traffic.
# one call, no signup
curl -s -X POST https://catchr.perch-app.workers.dev/api/bins
# → {"id":"a1b2c3d4","url":"https://catchr.perch-app.workers.dev/h/a1b2c3d4","token":"…"}
# send anything to the url, then read it back:
curl "https://catchr.perch-app.workers.dev/api/bins/a1b2c3d4/requests?token=…"See copy-paste CI & agent recipes →
Catchr vs a typical request bin
| Catchr | Typical bin | |
|---|---|---|
| Signup to create a bin | None | Often required |
| Create / read via JSON API | Yes — every action is a plain HTTP call | Sometimes read-only |
| Mock a custom status / body back | Yes | Rarely |
| Long-poll for the next request (no polling loop) | Yes (?wait=) | Rarely |
| MCP server for AI agents | Built in | No |
| Price | Free | Free tier + paid |
If you reached for RequestBin to grab a throwaway URL and eyeball an incoming request, Catchr does that in one call — and because it is API-first, the same bin also works inside an automated test or an AI agent's tool loop.
Frequently asked questions
Is Catchr a drop-in RequestBin alternative?
For the common case — an instant, throwaway URL that captures and displays incoming HTTP requests — yes. You create a bin with one call and inspect requests in a browser or over JSON.
Do I need an account?
No. A single POST returns a live URL and a read token. There is nothing to sign up for.
Does it have an API?
Yes. Creating a bin, capturing requests, reading them back, setting a mock response, clearing and deleting are all plain HTTP calls, which makes it usable from CI and from AI agents.
How is this different from webhook.site?
Catchr is designed API-first and inbound-only: it never forwards or originates a request to a target you name, so it can't be used as a relay. It also ships an MCP server and a configurable mock response.
Is my captured data private?
Bins are unguessable and reads require the per-bin token. Sender IPs are stored one-way hashed, and old requests are pruned automatically.