OfficialIntegrations
MCP Builder skill
Guides building quality MCP servers in Python (FastMCP) or TypeScript.
MCP Builder is Anthropic’s skill for building quality MCP servers.
The MCP Builder skill is a development guide for Model Context Protocol servers that expose external APIs as tools for LLMs. It covers tool design, implementation in Python with FastMCP or in Node/TypeScript, and evaluation of the finished server, for developers wiring their own services into agents. Anthropic publishes it under Apache-2.0 in the example-skills plugin for Claude Code; it is pre-installed in the Claude apps on paid plans and available through the Skills API.
Install
From the skill’s source repository:
/plugin marketplace add anthropics/skills
/plugin install example-skills@anthropic-agent-skills
- Skill
- MCP Builder
Questions
Which languages does MCP Builder cover?
Python with FastMCP, and Node/TypeScript.
What parts of building a server does MCP Builder guide?
Tool design, implementation and evaluation of the finished server.
How do I install MCP Builder in Claude Code?
Add the anthropics/skills marketplace, then install the example-skills plugin with the two commands above.
What license does MCP Builder use?
Apache-2.0.
Sources
- MCP Builder source
- License: Apache-2.0
Checked October 2, 2026.
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