What it does
Mocks HTTP, GraphQL, gRPC, WebSocket, MQTT, SSE and SOAP APIs from a single command line tool. It can import API specs, keep state for CRUD behaviour, inject failures to test resilience and return deterministic seeded responses. The MCP server lets an AI agent create mocks for you.
Use cases
- 01Mock a backend API while the frontend is built
- 02Import an OpenAPI spec and serve fake responses
- 03Simulate failures to test how an app handles errors