How does this help with MCP server quality?

It enforces best practices for tool naming, pagination, error messaging, and schema definition, ensuring your servers are discoverable and reliable for LLMs.

Does it include testing tools?

Yes, it includes a dedicated evaluation stage where you generate 10 complex, realistic QA pairs in XML format to verify the LLM's ability to use your tools correctly.

What languages does the MCP Builder skill support?

It supports both TypeScript using the official MCP SDK and Python using FastMCP, providing specific templates and patterns for each.

Can I use this for existing internal APIs?

Absolutely. This skill is specifically designed to help you wrap any external or internal service into a format compatible with the Model Context Protocol.

MCP Server Builder

Name: MCP Server Builder
Author: MarcelLeon

byMarcelLeon

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API 개발

Builds high-quality Model Context Protocol (MCP) servers to enable LLM interaction with external APIs and services.

The mcp-builder skill provides a comprehensive, step-by-step framework for designing and implementing Model Context Protocol (MCP) servers in both TypeScript and Python. It guides developers through the entire lifecycle of server creation—from initial API research and planning tool discovery to implementation with SDKs, error handling, and rigorous evaluation using XML-based QA pairs. This skill ensures that the resulting MCP servers are robust, scalable, and optimized for LLM consumption, facilitating seamless integration between AI models and real-world software tools.

주요 기능

01Automated retrieval of official MCP specification and SDK documentation

02Multi-language support for TypeScript (MCP SDK) and Python (FastMCP)

03Guided workflow for tool naming, context management, and error handling

04Comprehensive evaluation framework for testing server effectiveness with complex QA pairs

0513 GitHub stars

06Standardized patterns for Zod and Pydantic input/output schemas

사용 사례

01Developing a custom bridge between a proprietary internal API and a Claude-powered agent

02Standardizing MCP server development across a technical team using best practices

03Creating high-quality open-source MCP connectors for popular SaaS platforms

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add marcelleon/skills-zh mcp-builder

For use in Claude.ai and ChatGPT

Download Skill