Beeceptor

Beeceptor is a hosted service for building mock servers for REST, SOAP, GraphQL and gRPC APIs. You can start a mock on a unique subdomain in seconds, without installing anything.

Beeceptor creates a mock server from an OpenAPI or GraphQL definition, or from rules you write in a visual editor. Responses can reuse data from the incoming request, so the mock behaves more like a real service. It records requests so you can inspect payloads and headers. It can also proxy traffic to a live backend and switch to mock mode when that backend is down. A local tunnel can route third-party event payloads to your development machine.

• Build mock servers from OpenAPI specs
• No-code rules for matching requests and responses
• Inspect request payloads and headers in real time
• Proxy to a live backend, with mock fallback
• Simulate delays, timeouts and errors

Frontend teams waiting on a backend, QA teams that need failure cases and product teams that want to give demos without any backend work.

A free tier is available, and it includes a mock server on a subdomain. The pricing page lists the plans. Hosted mocks are reachable from any network, which makes them handy for shared demos, but you should avoid putting real customer data into a shared mock.