Webhook.site alternative for mock APIs
Webhook.site is great for one-off inspection. If you actually need to mock a third-party API, replay captured webhooks into your handler, or drive your testing from an AI agent — you'll outgrow it fast. Here's a side-by-side.
Webhook.site is the default tool for "I just need to see what hit this URL." It's fine for that single use case. It's also where most developers stop.
The problem: as soon as you want to do something with the captured request — return a canned response, replay it into local code, forward to your real handler, use it inside an AI coding workflow — you hit a wall and start paying webhook.site for capabilities that should be free.
RequestBin's free tier covers all of those.
Side-by-side
| Capability | Webhook.site (Free) | RequestBin (Free) |
|---|---|---|
| Public webhook URL | 1 URL | 3 bins · 500 req/day each |
| Real-time inspection | ✓ | ✓ |
| Quick replay into your code | ✗ (paid) | ✓ |
| Forwarding rules | ✗ (paid, basic only) | ✗ (Pro) |
| Mock APIs (return canned responses) | ✗ | 1 mock + 1 rule preview |
| Bulk NDJSON export | ✗ (paid) | 100 latest |
| API access | ✗ (paid) | ✓ (5 API keys) |
| MCP server (AI IDE) | ✗ | ✓ |
| PRO upgrade price | $24 / mo | $12 / mo |
Concrete moments where webhook.site stops working
1. "I want to re-send this captured request to my local handler."
Webhook.site shows you the request. To re-send it, you copy the body manually and curl it back, or upgrade to paid. RequestBin's Replay button does this with one click — free.
2. "I need a URL that returns 200 OK with this specific JSON to my frontend during dev."
Webhook.site has no mock-API mode. You'd run your own Express stub or pay for Beeceptor. RequestBin's Mock APIs tab does this — free tier includes 1 mock with 1 rule.
3. "I want Claude Code / Cursor to drive my webhook testing workflow."
Webhook.site has no MCP server. RequestBin's MCP server ships 13 tools (5 for mocks, 8 for bins) so an AI agent can create endpoints, configure rules, deploy, trigger from your code, and verify captures — without you leaving the editor. Free.
4. "I need to export 10k captured requests for my report."
Webhook.site puts API/export behind a paywall. RequestBin's bulk NDJSON export is free up to 100 latest (PRO removes the cap). Streams via Mongoose cursor so even 100k-row exports don't load into memory.
When webhook.site is the right call
If your single use case is "email me a URL, I paste it somewhere, I look at the result once, I delete the URL," webhook.site is purpose-built for that. Don't over-tool.
If you're doing any of the four things above on a regular basis, the math shifts.
Migration takes 30 seconds
Webhook.site URLs aren't sticky — they're just paste-targets. To switch:
- Sign up at RequestBin
- Create a bin → copy URL
- Paste into wherever you configured the webhook.site URL
- Old URL stays around (delete later if you want). No data lost.
Going further
- Full /webhook-site-alternative landing with feature-by-feature comparison
- Mock APIs overview for the canned-response use case
- Replay docs
