mcp-builder

An agent skill by anthropics, from anthropics/skills. Tags: anthropic, api, debugging, developer-tools, mcp.

What it 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).

Install

With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:

npx skills add anthropics/skills --skill mcp-builder

Or copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):

git clone --depth 1 https://github.com/anthropics/skills
cp -r skills/skills/mcp-builder ~/.claude/skills/mcp-builder

Safety box score

Not rated yet. A safety box score grades what a skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. Anyone can request one from this page; it is saved for everyone. How the score works.

Source

Repository

anthropics/skills (all skills from this repository)

Path

skills/mcp-builder/SKILL.md

Branch

main

Updated

2026-09-19

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