mcp-builder Claude Code Skill
Claude Code SkillClaude CodeAI Agents & AI App DevelopmentClaude Code Customization & WorkflowThe explanation below is AI-generated. Please verify it against the sources.
This is a Claude skill that provides a structured guide for building MCP (Model Context Protocol) servers, which let large language models interact with external services through defined tools. It walks through a four-phase process: researching MCP design and the relevant SDK, implementing the server and its tools, reviewing and testing the build, and finally creating evaluation questions to check tool effectiveness. It covers both Python (using FastMCP) and Node/TypeScript (using the MCP SDK, including both v1 and v2 versions), with recommendations on naming, schemas, error handling, and transport choice. The skill bundles reference documents for best practices, language-specific implementation patterns, and evaluation creation. It is intended for developers who need to design or review MCP servers rather than for end-users of a specific SaaS product.
What you can do with mcp-builder
- Follow a four-phase workflow covering planning, implementation, testing, and evaluation of an MCP server
- Get guidance on choosing between comprehensive API coverage and higher-level workflow tools
- Access language-specific implementation guides for Python/FastMCP and Node/TypeScript (MCP SDK v1 and v2)
- Learn conventions for tool naming, input/output schemas, pagination, and error messages
- Use a provided evaluation guide to create and verify realistic test questions for the built server
- Reference checklists for code quality, build verification, and testing with MCP Inspector
Sources
History of mcp-builder
- Claude Code Skill Updated skill content (SKILL.md) of mcp-builder