What problem does it solve?
This Skill helps developers design and implement high-quality MCP servers that let LLMs interact reliably with external APIs and services. It reduces the guesswork around tool design, protocol choices, schema definition, error handling, testing, and evaluation.
Core Features & Use Cases
- End-to-end MCP server guidance: Covers research, planning, implementation, review, testing, and evaluation for MCP servers.
- Language-specific implementation support: Provides direction for both TypeScript and Python MCP development, including SDK usage, schema patterns, and transport recommendations.
- Tool design best practices: Emphasizes discoverable naming, comprehensive API coverage, structured outputs, pagination, annotations, and actionable error messages.
- Evaluation workflow: Helps create realistic read-only benchmark questions to verify that an LLM can use the server effectively in real tasks.
- Use case: Build an MCP server for a SaaS platform such as GitHub, Stripe, or an internal API so agents can search data, retrieve records, and perform supported actions through well-structured tools.
Quick Start
Ask the agent to use the mcp-builder skill to plan and implement an MCP server for a specific API in TypeScript or Python, then generate a testing and evaluation checklist.