Overview
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.
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
Installation
Add mcp-developer to your agent with:
/plugin marketplace add Jeffallan/claude-skillsReview a skill’s source before installing it — skills can instruct your agent to run commands. This command comes from the skill’s public repository, which is the source of truth for setup steps. New to skills? Read how to install Claude Code skills.
Supported agents
- Claude Code — ships a claude code plugin marketplace
License
mcp-developer is published under the MIT license.
Strengths
- Clear MIT license — safe to read and adapt within its terms
- Ships in Jeffallan/claude-skills, an established project with 11,060 GitHub stars
- Works with Claude Code
- Actively maintained — repository updated in the last 90 days
Author
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.
- Which agents does mcp-developer work with?
- mcp-developer lists Claude Code — named in its SKILL.md, its plugin marketplace or its repository topics. Skills use the portable SKILL.md format, so other agents that read that format may load it too.
- 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.
