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Mcp builder

Skill dkyazzentwatwa/chatgpt-skills/mcp-builder

Plan and build MCP servers with agent-friendly tools, schemas, error handling, and evaluation. Use when creating or refactoring MCP integrations.From its SKILL.md

Install
npx -y skills add dkyazzentwatwa/chatgpt-skills --skill mcp-builder

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

  • no licenseNo license file was found in the repository. Code published without one is not open source by default, so using it at work is a question for whoever answers licensing questions where you are.

SKILL.md

1.5 KB, 263 tokens by cl100k_base, as published. Nobody here has run it

MCP Builder

Build MCP servers around user workflows, not raw API endpoints.

Workflow

  1. Read the target API docs and identify the workflows an agent must complete end to end.
  2. Design a small tool surface with high-signal outputs, clear identifiers, and actionable errors.
  3. Implement shared infrastructure first: auth, request helpers, pagination, truncation, and formatting.
  4. Add tool schemas and docstrings that make correct usage obvious.
  5. Evaluate the server with realistic tasks before expanding scope.

Principles

  • Prefer workflow tools over thin endpoint wrappers.
  • Return concise, high-signal responses by default.
  • Use human-readable identifiers whenever possible.
  • Make error messages corrective: tell the agent what to try next.
  • Design for limited context and large datasets.

Resources

  • references/mcp_best_practices.md for design principles that apply to every server.
  • references/python_mcp_server.md for Python implementation patterns.
  • references/node_mcp_server.md for TypeScript implementation patterns.
  • scripts/connections.py and scripts/evaluation.py as repo-local helpers.

Deliverables

  • A concrete tool inventory tied to user workflows.
  • Strict input/output schemas.
  • Evaluation prompts or scripts that confirm the server is usable by an agent.

What ships with it: 10 files

130.6 KB alongside SKILL.md, 2 of them executable

agents/

references/

scripts/

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