MCP Server Builder

Search MCP protocol AND FastMCP framework documentation with ranked results.

This tool searches across both documentation sources simultaneously:

MCP Protocol (modelcontextprotocol.io):

• Official protocol specification and architecture

• Transports (stdio, streamable HTTP)

• Tools, Resources, and Prompts primitives

• Lifecycle, capabilities negotiation, and security

FastMCP Framework (gofastmcp.com):

• Python framework for building MCP servers

• Decorators, type hints, and Pydantic integration

• Authentication, deployment, and production patterns

• Client SDK and cloud deployment

Use this to find documentation for building MCP servers with either approach.

Args: query: Search query string (e.g., "tool input schema", "stdio transport") k: Maximum number of results to return (default: 5) source: Optional filter - "mcp" for protocol docs only, "fastmcp" for framework docs only. If None, searches both sources.

Returns: List of dictionaries containing: - url: Document URL - title: Display title - score: Relevance score (higher is better) - snippet: Contextual content preview - source: Documentation source ("mcp" or "fastmcp")

Fetch full document content by URL from MCP protocol or FastMCP framework docs.

Retrieves complete documentation content from URLs found via search_mcp_docs or provided directly. Works with both documentation sources:

Supported domains:

• modelcontextprotocol.io - Official MCP protocol specification

• gofastmcp.com - FastMCP Python framework documentation

Use this to get full documentation pages when search snippets aren't sufficient, including:

• Complete protocol specifications and API references

• Full tutorial and example code

• Configuration, authentication, and deployment instructions

Args: uri: Document URI (http/https URLs from supported domains)

Returns: Dictionary containing: - url: Canonical document URL - title: Document title - content: Full document text content - source: Documentation source ("mcp" or "fastmcp") - error: Error message (only present if fetch failed)