MCP Server Builder
Builds production-ready, context-efficient MCP servers using FastMCP v2 and progressive disclosure patterns.
This skill provides specialized architecture guidance for creating Model Context Protocol (MCP) servers using FastMCP v2, focusing heavily on token efficiency and production standards. It enforces mandatory patterns such as 'uv' for dependency management and optimized tool annotations to reduce context overhead by up to 70%. For complex implementations with more than five capabilities, the skill implements a progressive disclosure gateway pattern that achieves 85-93% token reduction, ensuring that large-scale servers remain performant and cost-effective within LLM context windows.
Key Features
01119 GitHub stars
02FastMCP v2 implementation with mandatory optimization patterns
03Progressive disclosure architecture for 85-93% token reduction
04Authoritative documentation retrieval via FastMCP LLMS_TXT.md workflow
05Standardized MCPB bundling for distribution and validation
06Optimized tool descriptions using readOnlyHint and openWorldHint annotations
Use Cases
01Building lightweight MCP servers with 1-3 optimized tools for specific tasks
02Architecting high-capacity gateway servers that manage dozens of related tools efficiently
03Packaging existing server code into validated .mcpb bundles for distribution