Domain Search MCP

--- title: I Built an MCP Server to Check Domain Availability from Claude published: true description: How I stopped context-switching between AI and domain registrars tags: ai, typescript, opensource, webdev cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/placeholder.png --- # I Built an MCP Server to Check Domain Availability from Claude Last week, I was brainstorming names for a new side project with Claude. Every time I came up with a name, I had to: 1. Leave Claude 2. Open Namecheap/Porkbun 3. Search the domain 4. Go back to Claude 5. Report the result 6. Repeat 50 times This was frustrating. So I built a solution. ## Introducing Domain Search MCP [Domain Search MCP](https://github.com/dorukardahan/domain-search-mcp) is an open-source MCP server that gives Claude the ability to check domain availability in real-time. Now my workflow is: > **Me:** "Is vibecoding.com available?" > **Claude:** "✅ vibecoding.com is available at $9.73/year on Porkbun (includes free WHOIS privacy)" ## What is MCP? [Model Context Protocol (MCP)](https://modelcontextprotocol.io) is Anthropic's open standard for connecting AI assistants to external tools and data sources. Think of it as USB-C for AI – a universal way to plug in capabilities. ## Features ### 1. Multi-Source Search Checks domain availability across: - **Porkbun** (with pricing) - **Namecheap** (with pricing) - **RDAP** (free, 50+ TLDs) - **WHOIS** (fallback) ### 2. Sherlock-Style Social Check ``` check_socials("vibecoding") ``` Returns availability across 10 platforms: - HIGH confidence: GitHub, npm, PyPI, Reddit - MEDIUM confidence: Twitter, YouTube, ProductHunt - LOW confidence: Instagram, LinkedIn, TikTok ### 3. Premium Domain Analysis When a domain is premium, you get insights: ``` 💎 ai.io is priced at $5000 (125x standard .io pricing) Why premium: Two-character domain, Popular keyword "ai", High-demand .io extension 💡 Try: getai.io, aihq.io, ai.dev ``` ### 4. Expiration Tracking For taken domains, see when they expire: ``` 🕐 coolstartup.com expires in 23 days — watch for availability ``` ## Quick Start ```bash # Add to Claude Desktop npx @anthropic/claude-code mcp add domain-search-mcp ``` Or manually add to `claude_desktop_config.json`: ```json { "mcpServers": { "domain-search": { "command": "npx", "args": ["-y", "domain-search-mcp"] } } } ``` ## Zero Config Mode Works out of the box using public RDAP/WHOIS. Add registrar API keys for pricing: ```bash PORKBUN_API_KEY=pk1_xxx PORKBUN_API_SECRET=sk1_xxx ``` ## Technical Highlights - **TypeScript** with strict types - **Zod validation** for all API responses - **98 tests** passing - **LRU cache** with TTL - **Rate limiting** per registrar - **Security audited** (see SECURITY.md) ## Architecture ``` ┌─────────────────────────────────────────┐ │ MCP Protocol Layer │ │ (Zod schema validation) │ ├─────────────────────────────────────────┤ │ 6 Tools │ │ search_domain, bulk_search, compare, │ │ suggest, tld_info, check_socials │ ├─────────────────────────────────────────┤ │ Registrar Adapters │ │ Porkbun │ Namecheap │ RDAP │ WHOIS │ └─────────────────────────────────────────┘ ``` ## What's Next? I'm considering adding: - DNS record checking - SSL certificate info - Trademark search integration What features would you find useful? Drop a comment! --- **GitHub:** https://github.com/dorukardahan/domain-search-mcp **License:** MIT If this helped you, consider giving it a ⭐ on GitHub!