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MCP Builder

MCP Builder is an agent skill (a SKILL.md file) from anthropics/skills. Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. It works with Claude Code and has 179,945 GitHub stars across a repository of 9 listed skills.

github.com/anthropics/skills/skills/mcp-builder (opens in a new tab)

  • Official
  • Multi-skill repo
  • Plugin marketplace
  • Coding
  • Actively maintained
View on GitHub (opens in a new tab)View on skills.sh (opens in a new tab)

Add this skill

Claude

This repository is a Claude Code plugin marketplace. In Claude Code:

/plugin marketplace add anthropics/skills
/plugin   # browse anthropic-agent-skills and install the plugin that contains mcp-builder

In the Claude apps, zip the mcp-builder folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/anthropics/skills.git
cp -r skills/skills/mcp-builder .agents/skills/mcp-builder   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/anthropics/skills.git
cp -r skills/skills/mcp-builder .cursor/skills/mcp-builder   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK). Create MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools.

When it triggers

  • Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).

More skills in anthropics/skills

9 skills are listed from this repository.

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FAQ

MCP Builder FAQ

Still curious? Email info@appsgit.com.

What is the MCP Builder skill?

MCP Builder is an agent skill (a SKILL.md file) from anthropics/skills. Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. It works with Claude Code and has 179,945 GitHub stars across a repository of 9 listed skills. Its SKILL.md lives at github.com/anthropics/skills/skills/mcp-builder.

How do I install the MCP Builder skill?

In Claude Code, run /plugin marketplace add anthropics/skills, then install its plugin from /plugin. For Codex or Cursor, copy the mcp-builder folder into .agents/skills/ or .cursor/skills/.

Is the MCP Builder skill free?

Yes. The repository is open source under the Apache-2.0 license.

Is MCP Builder maintained?

The repository's most recent commit was on Oct 5, 2026. appsgit only lists skills from repositories with a commit in the last six months.