{"id":"leanmcp-leanmcp-sdk","name":"leanmcp-sdk","af_score":46.8,"security_score":37.2,"reliability_score":17.5,"what_it_does":"LeanMCP is a modular TypeScript toolkit for building and deploying MCP (Model Context Protocol) servers, providing an HTTP server runtime plus decorators-based tool/prompt/resource definitions. The README indicates optional modules for authentication, multi-tenancy, request logging, observability, and env/secret injection, along with a CLI for scaffolding and managing MCP projects.","best_when":"You are already operating an MCP server (or plan to) and want a TypeScript SDK with decorators plus optional enterprise capabilities like auth and multi-tenancy.","avoid_when":"You need explicit, verified details about authentication methods, scopes, rate limits, and error codes from the README alone, or you require an OpenAPI/SDK-first REST contract without running your own HTTP server.","last_evaluated":"2026-03-30T15:32:26.752733+00:00","has_mcp":true,"has_api":true,"auth_methods":["Authentication module indicated via @leanmcp/auth and @requireAuth() decorator (exact mechanism not specified in provided content)"],"has_free_tier":false,"known_gotchas":["README indicates multiple optional modules (auth, env injection, observability) but the provided content does not specify behaviors, error formats, or retry semantics; agents may need to inspect the actual package docs/source for reliable handling.","Tool inputs/outputs rely on decorators and schema constraints; agents should validate payload shapes against the defined input classes to avoid schema-validation failures."],"error_quality":0.0}