Extract API schemas from source code. Supports: MCP tools (Zod), OpenAPI/Swagger specs, GraphQL SDL, tRPC routers, REST endpoints (Express/Fastify), gRPC/Protobuf services, Python (FastAPI/Flask decorators), Go (Gin/Chi handlers), and SQL DDL (CREATE TABLE, CREATE TYPE). Auto-detects format from file contents.

Extract API schemas from a single file. Supports TypeScript, Python, Go, Protobuf, GraphQL SDL, OpenAPI JSON/YAML, and SQL DDL.

Trace how client code calls APIs. Detects: MCP callTool(), fetch/axios HTTP calls, Apollo Client hooks (useQuery/useMutation), Python requests/aiohttp/httpx, and tracks property access patterns on responses.

Trace API usage in a single file. Detects HTTP calls, GraphQL queries, MCP tool calls, and response property access.

Full contract validation: extract producer schemas, trace consumer usage, compare for mismatches. Works across languages (TS↔Python, Go↔TS, etc.) and protocols (REST, GraphQL, gRPC, MCP).

Generate type-safe client code from API schemas. Creates TypeScript functions, React hooks, or Zustand actions with full type inference.

Generate API stubs from client usage patterns. Infers schema from how client code calls the API.

Add cross-reference comments to validated producer/consumer pairs. Documents the contract relationship in both files.

Initialize a trace project with .trace-mcp config directory. Creates project structure for watch mode and caching.

Watch project files for changes and auto-revalidate contracts. Actions: start (begin watching), stop (end watching), status (check state), poll (get pending events).

Get the status of a trace project including config, cache state, and last validation result.