{
  "markdown": "# DomainCheckr MCP Server\n\nCheck domain name availability instantly using RDAP. No API key or installation required. Works as a remote MCP server.\n\n## Quick Start\n\nThis is a **remote MCP server** -- no local installation needed. Just add the URL to your MCP client.\n\n### Claude Desktop\n\nAdd to your `claude_desktop_config.json`:\n\n```json\n{\n  \"mcpServers\": {\n    \"domaincheckr\": {\n      \"url\": \"https://domaincheckr.fly.dev/mcp\"\n    }\n  }\n}\n```\n\nConfig file location:\n- macOS: `~/Library/Application Support/Claude/claude_desktop_config.json`\n- Windows: `%APPDATA%\\Claude\\claude_desktop_config.json`\n\n### Claude Code\n\n```bash\nclaude mcp add domaincheckr --transport http https://domaincheckr.fly.dev/mcp\n```\n\n### Cursor\n\nAdd to `~/.cursor/mcp.json`:\n\n```json\n{\n  \"mcpServers\": {\n    \"domaincheckr\": {\n      \"url\": \"https://domaincheckr.fly.dev/mcp\"\n    }\n  }\n}\n```\n\n### Windsurf\n\nAdd to `~/.codeium/windsurf/mcp_config.json`:\n\n```json\n{\n  \"mcpServers\": {\n    \"domaincheckr\": {\n      \"url\": \"https://domaincheckr.fly.dev/mcp\"\n    }\n  }\n}\n```\n\n## Tools\n\n| Tool | Description |\n|------|-------------|\n| `check_domain` | Check if a single domain name is available for registration. Returns registrar, creation date, expiry, and nameservers for taken domains. |\n| `check_domains_bulk` | Check up to 50 domain names at once. Returns per-domain results with summary counts. |\n| `suggest_domains` | Generate and check domain name ideas for a keyword or business description. Creates 15 variations across .com, .io, .ai, .dev, .co and common prefixes/suffixes. |\n\n## Example Prompts\n\nTry asking your AI assistant:\n\n- \"Is coolstartup.com available?\"\n- \"Check if these domains are available: acmecorp.com, acmehq.com, getacme.com\"\n- \"Find me a domain for a pet grooming business\"\n- \"I'm building a fintech app called PayFlow, find me a domain\"\n\n## How It Works\n\nDomainCheckr uses the [RDAP protocol](https://about.rdap.org/) (Registration Data Access Protocol) to check domain availability in real time. RDAP is the modern replacement for WHOIS, standardized by the IETF.\n\n- Queries Verisign RDAP for .com/.net domains\n- Queries PIR RDAP for .org domains\n- Falls back to rdap.org for all other TLDs\n- HTTP 404 = available, HTTP 200 = taken\n\nNo scraping, no third-party APIs, no rate-limited services. Direct registry queries.\n\n## REST API\n\nThe same service is available as a REST API for building your own integrations or ChatGPT Actions.\n\n| Endpoint | Description |\n|----------|-------------|\n| `GET /check/{domain}` | Check a single domain |\n| `POST /check` | Bulk check (body: `{\"domains\": [\"a.com\", \"b.com\"]}`, max 50) |\n| `GET /suggest?keyword=fintech` | Generate and check domain ideas |\n| `GET /health` | Health check |\n| `GET /docs` | Interactive API documentation |\n| `GET /openapi.json` | OpenAPI spec (for ChatGPT Actions) |\n\nBase URL: `https://domaincheckr.fly.dev`\n\n## License\n\nMIT\n",
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