MCP Builder

Name: MCP Builder
Author: Anthropic

Build MCP servers that connect Claude to your tools.

by Anthropic · anthropics/skills

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 8.8/10
Tested: Jun 20, 2026
Environment: Claude Code 2.x

Built a working MCP server wrapping an internal REST API, with tool schemas and error handling, in about an hour of supervised work.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 4/5
Output vs. baseline 8/10
Docs & honesty 5/5

What it does

Guides Claude through building Model Context Protocol servers — tool definitions, schemas, auth, error handling. The fastest route to connecting Claude to internal APIs.

Install

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

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Appears in

Skills for Developers