Framework docs,
indexed for AI agents.
Use the gc_lookup MCP tool to query any of the 9 frameworks below — available on all plans including free.
Quick-start
gc_lookup(
framework="nextjs",
query="how to use server actions"
)Free tier: gc_lookup is live today on the free tier (no credit card). It returns relevance-ranked documentation chunks from the Agent Context Hub across 9 indexed frameworks. Sign up for a free API key and call it from Claude Code, Cursor, or any MCP client.
Indexed frameworks (9)
- Drizzle ORMlatest
TypeScript ORM for SQL databases
slug: "drizzle"
- FastAPIlatest
Modern Python web framework
slug: "fastapi"
- FastMCPlatest
Python MCP server framework
slug: "fastmcp"
- LangChainlatest
LLM application framework (Python)
slug: "langchain"
- Next.jslatest
React framework for production
slug: "nextjs"
- Pydanticlatest
Data validation using Python type hints
slug: "pydantic"
- Reactlatest
JavaScript library for building UIs
slug: "react"
- SQLAlchemy2.0
Python SQL toolkit and ORM
slug: "sqlalchemy"
- Tailwind CSSlatest
Utility-first CSS framework
slug: "tailwindcss"
How to use gc_lookup
- No slug: searches across all indexed frameworks — useful for cross-framework questions.
- With slug: scopes to one framework for higher-precision results (e.g.
slug="fastapi"). - k parameter: controls result count (1–20, default 8). Increase for broad surveys; lower for quick lookups.
- Plan required: free — reads the shared system Knowledge Base, not your project KB.
Get your free MCP API key
Add gc_lookup to any MCP client. Free on all plans — no credit card required.