Anthropic's skill for building MCP servers: it walks the agent through tool design, schemas, transports and testing so the server it generates follows the Model Context Protocol correctly and works in Claude Code, Cursor and Codex.
skillgild install mcp-builder
License: Apache-2.0 · Created by Anthropic
Pick your agent. The wrapper only tells your agent how to start a session. The skill's instructions arrive with each session, after your access is checked.
Sign in once from your terminal.
skillgild loginInstall this skill for Claude Code.
skillgild install mcp-builder --agent claude-codeRegister the SkillGild MCP server with Claude Code.
claude mcp add --scope user skillgild -- $(command -v skillgild) mcpStart a session, follow its guide, then end it. Create an API key under Account and pass it as a bearer token.
# Prints the session ID, its tools and the instructions for your agent
skillgild session mcp-builder
skillgild end <session-id>Run skillgild install mcp-builder --agent claude-code and connect the SkillGild MCP server (skillgild mcp). When a task matches, your agent starts a session, which uses one of your 25 free runs this month, and follows the skill's instructions. Use --agent codex, cursor or gemini-cli for other clients.
Yes. It includes 25 free runs every month on SkillGild. MCP Builder is open source (Apache-2.0) by Anthropic; SkillGild packages it from https://github.com/anthropics/skills at a pinned commit and credits the author.
It runs in your coding agent with your own model. SkillGild checks your monthly allowance and delivers the skill's instructions for each session; it makes no model call and never sees your project unless your agent sends it.
The project lists Claude Code, any Agent Skills host. It is a plain Agent Skills folder (SKILL.md plus supporting files), so any client that reads that format can load it.
Setup steps and worked examples for this kind of skill.
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