RequestBin was the original “paste a URL, see the request” tool. The free hosted requestb.in was shut down years ago, and the brand now belongs to Pipedream — checked August 2026: both requestb.in and requestbin.com HTTP 301 to pipedream.com/requestbin, and clicking Create Request Bin there redirects straight to /auth/signup. The thing people actually remember — a throwaway URL that catches requests, before any account exists — isn't what lives at that address anymore.
Mockbird gives you that exact workflow back: one curl → a URL that accepts any method on any path, logs method, headers (webhook signatures included) and body, and replies with whatever you tell it to. Free, no signup, URLs don't expire.
📡 Is requestb.in still dead? We check it — plus Hookbin, ptsv2.com (Post Test Server V2 — dedicated guide), webhook.site and mockbin.org (Kong's bin+mock playground, also gone) — with a plain GET every 30 minutes: live status page.
The shared demo project has a catch-all bin and a public request inspector. Pretend you're a webhook sender:
curl -X POST https://mockbird.mockbird.workers.dev/m/demo/github/webhook \
-H 'content-type: application/json' \
-H 'X-GitHub-Event: push' \
-H 'X-Hub-Signature-256: sha256=d00d1e' \
-d '{"ref":"refs/heads/main","commits":1}'
# now read the bin — method, path, body, and the signature headers are all there
curl https://mockbird.mockbird.workers.dev/api/projects/demo/requests(The demo is shared and resets daily — private bins below.)
# 1. create a project (no signup)
curl -X POST https://mockbird.mockbird.workers.dev/api/projects \
-H 'content-type: application/json' -d '{"name":"my-bin"}'
# → {"id":"abc123","adminKey":"KEY", ...}
# 2. add a catch-all route: any method, any path
curl -X POST https://mockbird.mockbird.workers.dev/api/projects/abc123/routes \
-H 'X-Admin-Key: KEY' -H 'content-type: application/json' \
-d '{"method":"ANY","path":"/*","body":{"ok":true}}'Every request to https://mockbird.mockbird.workers.dev/m/abc123/… now answers 200 {"ok":true} and is logged. Read it back with GET /api/projects/abc123/requests (admin key), or open the dashboard's Recent requests card, tick “live”, and watch deliveries stream in — click a row to expand headers and body.
| You used to… | Now |
|---|---|
| Click “Create a RequestBin” | one POST /api/projects + one catch-all route (above) |
Point a webhook at requestb.in/<id> | point it at /m/<project>/anything/you/like — every path under the project is caught |
Open ?inspect to see requests | GET /api/projects/<project>/requests or the dashboard's live inspector |
| Watch the bin expire after 48 hours | bins don't expire |
Get a fixed 200 ok back | any status, custom headers, templated bodies that echo the request ({"challenge":"{{body.challenge}}"} handles URL-verification handshakes), per-route latency |
To be fair to the new owner: Pipedream's take is genuinely more powerful than the original. A modern “bin” there is a full workflow — you can run Node or Python on every event, return computed responses, and pipe deliveries into thousands of connected apps. If you want to do something with the requests — transform, route, automate — that's the right tool, and their event history is persistent.
The trade: it requires an account before you have a URL, and on the Free plan every caught request runs a workflow execution against a daily credit cap (a credit ≈ 30 seconds of compute; active workflows are limited too — see their pricing docs). For “I need a URL for 5 minutes to see what this SDK sends”, that's a lot of machinery.
| Tool | Signup | Free capacity | URL lifetime | Beyond logging |
|---|---|---|---|---|
| Pipedream RequestBin | required | daily credit cap (each request = a workflow execution) | while the workflow is active | run real code per request, 1,000s of app integrations |
| webhook.site | no | 100 requests total | 7 days (free) | replay, email/DNS bins; scripting is paid |
| Beeceptor | no | 50 requests/day | unclaimed endpoints deleted after 7 days | rules engine, limited free |
| Mockbird | no | 10,000 requests/day/project | no expiry | templated responses, plus the same project is a full mock API |
Where the others still win: Pipedream executes arbitrary code and forwards events onward; webhook.site replays captured requests. Mockbird's inspector keeps the last 50 requests per project and truncates stored bodies at ~2,000 characters — a debugging window, not an archive. Written by the Mockbird maker — bias disclosed. Redirect chain, signup wall, and every curl on this page verified August 2026; Pipedream free-tier terms from their official pricing docs at the same date.
Catch-alls are a fallback: seeded resources and specific routes always win. So the same project can serve /products and /orders as a real fake backend while the catch-all quietly logs every stray request your app makes — which is usually the question you were debugging in the first place. Scope it with {"path":"/webhooks/*"} if you only want a subtree caught. And if you're building the webhook consumer side, Mockbird fires signed outbound webhooks too.