{"id":"langchain-ai-langchainjs-mcp-adapters","name":"langchainjs-mcp-adapters","af_score":39.5,"security_score":46.0,"reliability_score":32.5,"what_it_does":"Provides LangChain.js adapters to integrate Model Context Protocol (MCP) tools into LangChain.js applications, supporting MCP tool usage over stdio and SSE transports via the @modelcontextprotocol/sdk dependency.","best_when":"You want to connect LangChain.js agents to MCP tool servers and you already operate (or can operate) an MCP server using stdio or SSE transports.","avoid_when":"You need a turnkey hosted service with built-in auth, billing, and operational guarantees instead of a library adapter.","last_evaluated":"2026-03-30T13:35:48.018304+00:00","has_mcp":false,"has_api":false,"auth_methods":["Depends on MCP transport/server configuration (not evidenced in provided README/manifest)"],"has_free_tier":false,"known_gotchas":["Adapter migration: repository indicates the package moved into the LangChainJS monorepo; consumers may need to update import paths/version alignment.","Transport-specific behavior: stdio vs SSE can affect lifecycle and error/reconnect semantics; agent retry strategies may vary accordingly.","This adapter likely does not enforce tool-level auth/authorization; misconfigured MCP server permissions could surface as tool call failures."],"error_quality":0.0}