mcp-developer

mcp-developer is an open-source integrations skill for Claude Code and compatible agents, published by Jeffallan. Its author describes it as: “Use when building, debugging, or extending MCP servers or clients that connect AI systems with external tools and data sources. Invoke to implement tool handlers, configure resource providers, set up stdio/HTTP/SSE tr…”. The project has 11k stars on GitHub and is available under the MIT license. Add it to your setup with `/plugin marketplace add Jeffallan/claude-skills`.

What mcp-developer does

Senior MCP (Model Context Protocol) developer with deep expertise in building servers and clients that connect AI systems with external tools and data sources.

Installation

Add mcp-developer to your agent with:

/plugin marketplace add Jeffallan/claude-skills

Always review a skill's source before installing it. This command comes from the skill's public repository; the linked repo is the source of truth for exact setup steps.

What's inside

The SKILL.md for mcp-developer is organised into these sections:

• Core Workflow
• Reference Guide
• Minimal Working Example
• TypeScript — Tool with Zod Validation
• Python — Tool with Pydantic Validation
• Constraints
• MUST DO
• MUST NOT DO
• Output Templates

When to use it

Reach for mcp-developer when you want integrations help from your agent without writing the same instructions every session. Load the skill and the agent picks it up automatically for relevant tasks.

Strengths

• Clear MIT license — safe to read and adapt
• Ships in Jeffallan/claude-skills, an established project with 11,060 GitHub stars
• Actively maintained (recent commits)

Topics

Frequently asked questions

What does mcp-developer do?

Use when building, debugging, or extending MCP servers or clients that connect AI systems with external tools and data sources. Invoke to implement tool handlers, configure resource providers, set up stdio/HTTP/SSE transport layers, validate schemas with Zod or Pydantic, debug protocol compliance issues, or scaffold complete MCP server/client projects using TypeScript or Python SDKs.

How do I install mcp-developer?

Run /plugin marketplace add Jeffallan/claude-skills in your agent, then reload your skills. Review the source at https://github.com/Jeffallan/claude-skills before installing.

Is mcp-developer free to use?

Yes. mcp-developer is free and open source under the MIT license, so you can read, run, and adapt it within that license's terms.

Where does mcp-developer come from?

mcp-developer ships inside Jeffallan/claude-skills, a repository that contains 41 catalogued skills in total. The repository's 11,060 GitHub stars apply to that whole collection, not to this skill on its own.