MCP (Model Context Protocol) is how Claude and other AI agents connect to external tools. I built 7 open-source MCP servers this week. All free, no API keys needed.
The Servers
| Server | What It Does | Install |
|---|---|---|
| mcp-web-tools | Web scraping, search, monitoring | npx @rog0x/mcp-web-tools |
| mcp-seo-tools | SEO analysis (meta, links, speed) | npx @rog0x/mcp-seo-tools |
| mcp-github-tools | GitHub repo analytics, PRs, issues | npx @rog0x/mcp-github-tools |
| mcp-json-tools | JSON validate, diff, CSV/YAML | npx @rog0x/mcp-json-tools |
| mcp-markdown-tools | TOC, lint, format, stats | npx @rog0x/mcp-markdown-tools |
| mcp-regex-tools | Regex test, explain, transform | npx @rog0x/mcp-regex-tools |
| mcp-api-tools | HTTP requests, JWT, headers | npx @rog0x/mcp-api-tools |
Key Learnings
1. MCP servers are simple. A basic one is ~50 lines of TypeScript. Register tools, handle calls, return results.
2. No API keys = adoption. Every server uses fetch() and cheerio. Anyone can install instantly.
3. The market is early. 11,000+ servers registered, less than 5% monetized, 85% monthly growth.
4. Utility wins. Boring tools (web scraping, JSON validation) get more installs than flashy ones.
How to Add to Claude Code
claude mcp add web-tools npx @rog0x/mcp-web-tools
That's it. Claude now has web scraping, search, and monitoring capabilities.
All Repos
Everything is on GitHub: github.com/rog0x
Also built prompt packs and Notion templates around these tools. Check the profile for the full catalog.
Questions or feature requests? Comment below.
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