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Check domain name availability via RDAP. Single, bulk, and smart suggestions. No API key needed.
Check domain name availability via RDAP. Single, bulk, and smart suggestions. No API key needed.
Remote endpoints: streamable-http: https://domaincheckr.fly.dev/mcp
Clean, well-structured domain checking server with proper error handling and appropriate permissions for its purpose. Includes affiliate tracking for revenue but discloses it clearly. No significant security concerns found. Supply chain analysis found 7 known vulnerabilities in dependencies (1 critical, 2 high severity).
7 files analyzed · 10 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
This plugin requests these system permissions. Most are normal for its category.
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
From the project's GitHub README.
Check domain name availability instantly using RDAP. No API key or installation required. Works as a remote MCP server.
This is a remote MCP server -- no local installation needed. Just add the URL to your MCP client.
Add to your claude_desktop_config.json:
{
"mcpServers": {
"domaincheckr": {
"url": "https://domaincheckr.fly.dev/mcp"
}
}
}
Config file location:
~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.jsonclaude mcp add domaincheckr --transport http https://domaincheckr.fly.dev/mcp
Add to ~/.cursor/mcp.json:
{
"mcpServers": {
"domaincheckr": {
"url": "https://domaincheckr.fly.dev/mcp"
}
}
}
Add to ~/.codeium/windsurf/mcp_config.json:
{
"mcpServers": {
"domaincheckr": {
"url": "https://domaincheckr.fly.dev/mcp"
}
}
}
| Tool | Description |
|---|---|
check_domain | Check if a single domain name is available for registration. Returns registrar, creation date, expiry, and nameservers for taken domains. |
check_domains_bulk | Check up to 50 domain names at once. Returns per-domain results with summary counts. |
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. |
Try asking your AI assistant:
DomainCheckr uses the RDAP protocol (Registration Data Access Protocol) to check domain availability in real time. RDAP is the modern replacement for WHOIS, standardized by the IETF.
No scraping, no third-party APIs, no rate-limited services. Direct registry queries.
The same service is available as a REST API for building your own integrations or ChatGPT Actions.
| Endpoint | Description |
|---|---|
GET /check/{domain} | Check a single domain |
POST /check | Bulk check (body: {"domains": ["a.com", "b.com"]}, max 50) |
GET /suggest?keyword=fintech | Generate and check domain ideas |
GET /health | Health check |
GET /docs | Interactive API documentation |
GET /openapi.json | OpenAPI spec (for ChatGPT Actions) |
Base URL: https://domaincheckr.fly.dev
MIT
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