Summary
This is a comprehensive guide for building MCP servers that actually work well with LLMs. It walks you through research, implementation, testing, and creating evaluations with 10 complex questions to verify your server works. The opinionated take is useful: prioritize comprehensive API coverage over workflow shortcuts, use TypeScript with streamable HTTP for remote servers, and include structured outputs with clear error messages. The four phase structure keeps you from jumping straight to code before understanding the API you're wrapping. Most valuable are the specific patterns for tool design, the evaluation framework requiring realistic multi-step questions, and links to MCP protocol docs and SDK references you'll actually need while building.
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npx -y skills add thinkinaixyz/deepchat --skill mcp-builder --agent claude-codeInstalls into .claude/skills of the current project.
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Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →An agent that runs the SEO playbooks that move rankings and ships PRs you control.
Get founding access →Connect Claude to +800M contacts, +150M companies. Find & Enrich leads in chat.
Try For Free →First SeenJun 11, 2026
