Beeceptor is a cloud-based API interceptor and mock server. ApiNotes is an OpenAPI-first alternative that auto-generates realistic mock responses from your spec — no manual route configuration needed.
Beeceptor is great for quick, manual mock endpoints. You get a subdomain instantly and can define rules to return custom responses. It also intercepts and logs requests, making it useful for webhook debugging. However, you build each route manually.
ApiNotes takes an OpenAPI spec and generates all mock endpoints automatically. If you already have a spec (or are designing one), you get a complete mock API without configuring a single route. Better for teams in an OpenAPI-first workflow who need realistic, schema-driven responses.
| Feature | Beeceptor | ApiNotes |
|---|---|---|
| Setup required | Pick subdomain → add rules | Paste OpenAPI spec → done |
| Time to first mock | 2–5 min (per-route setup) | < 60 seconds (all routes) |
| OpenAPI spec → mock | Basic import support | Native, schema-driven responses |
| Hosting | Cloud-hosted | Cloud-hosted |
| No sign-up required | ✅ (limited) | ✅ |
| Request logging | ✅ Real-time inspection | Usage stats + endpoint list |
| Proxy / forwarding | ✅ | ❌ |
| Request validation | ❌ | ✅ (Developer plan) |
| Latency simulation | ✅ | ✅ (Developer plan) |
| Endpoints per mock | 1 free / more on paid | Unlimited (all plans) |
| API documentation | ❌ | ✅ Full docs platform |
| Free tier requests | 50/day | 500 anonymous / 1K registered/mo |
| Paid plans from | $9.99/month | $8/month (includes docs platform) |
Pick an endpoint name (e.g., my-api.free.beeceptor.com), and you get a live URL immediately. Then you add mock rules one by one — defining path matching, response body, status code, and headers for each route. Quick for a few endpoints; tedious for large APIs.
Paste your OpenAPI spec (JSON or YAML), click "Create Mock Server." Every endpoint in your spec — with realistic response bodies generated from schemas — is live in under 60 seconds. No route-by-route configuration required.
Beeceptor can import OpenAPI specs to scaffold mock rules, but primarily works as a manual rule-based system. You define what each path returns. It doesn't generate rich, schema-driven responses from your spec automatically.
Built for OpenAPI 3.0, 3.1, and Swagger 2.0. Responses are generated from your spec's examples, x-example values, default values, and schema definitions. If your spec defines a User schema with name, email, and date fields, the mock returns realistic data matching those types.
One of Beeceptor's strengths: real-time request logging and inspection. You can see every incoming request's headers, body, and query params. Also supports proxying (forwarding unmatched requests to a real backend). Excellent for webhook debugging.
Provides a shareable control panel showing usage statistics, endpoint list, and status. Request logging focuses on usage counts. Developer plan adds request validation against OpenAPI schemas — ensuring callers send the right data format, not just logging what they sent.
Full control over each response: custom JSON/XML bodies, status codes, headers, and basic templating. Supports response delays and sequential responses. Rules can match by path, method, and headers. Great for testing specific edge cases.
Responses are automatically generated from your OpenAPI spec — realistic without manual editing. Developer plan adds latency simulation and error rate simulation for testing failure scenarios. Less manual control, but much faster to get comprehensive mocks for large APIs.
Free plan: 1 endpoint, 50 requests/day, 1-day history. Paid plans start at $9.99/month for more endpoints, higher limits, custom subdomains, and HTTPS. Pro plan ($24.99/month) adds more concurrent mocks and advanced features.
Free anonymous mocks: 500 requests, 72-hour validity, unlimited endpoints per mock. Free registered plan: 1 mock, 1K requests/month. Developer plan ($8/month): 2 persistent mocks, 50K requests/month, plus full API documentation platform included.
Paste your OpenAPI spec, get every endpoint mocked automatically. No route-by-route setup, no sign-up needed.