DomainCheckr
Check domain name availability via RDAP. Single, bulk, and smart suggestions. No API key needed.
Open source Repository Open in the app JSON README (API)
About
Check domain name availability via RDAP. Single, bulk, and smart suggestions. No API key needed.
Details
- Kind
- MCP servers
- Topic
- No topic detected
- Publisher
- nach-dakwale
- Origin
- official
- Category
- ferramentas
- Transport
- http
- Version
- 1.0.0
- Last push
- 2026-03-13T23:30:29Z
- Repository state
- arquivado
- Language
- Python
- License
- MIT
- Added
- 2026-08-29 04:00:52
- Updated
- 2026-08-29 04:00:52
- Origin id
io.github.nach-dakwale/domaincheckr
README
# DomainCheckr MCP Server
Check domain name availability instantly using RDAP. No API key or installation required. Works as a remote MCP server.
## Quick Start
This is a **remote MCP server** -- no local installation needed. Just add the URL to your MCP client.
### Claude Desktop
Add to your `claude_desktop_config.json`:
```json
{
"mcpServers": {
"domaincheckr": {
"url": "https://domaincheckr.fly.dev/mcp"
}
}
}
```
Config file location:
- macOS: `~/Library/Application Support/Claude/claude_desktop_config.json`
- Windows: `%APPDATA%\Claude\claude_desktop_config.json`
### Claude Code
```bash
claude mcp add domaincheckr --transport http https://domaincheckr.fly.dev/mcp
```
### Cursor
Add to `~/.cursor/mcp.json`:
```json
{
"mcpServers": {
"domaincheckr": {
"url": "https://domaincheckr.fly.dev/mcp"
}
}
}
```
### Windsurf
Add to `~/.codeium/windsurf/mcp_config.json`:
```json
{
"mcpServers": {
"domaincheckr": {
"url": "https://domaincheckr.fly.dev/mcp"
}
}
}
```
## Tools
| 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. |
## Example Prompts
Try asking your AI assistant:
- "Is coolstartup.com available?"
- "Check if these domains are available: acmecorp.com, acmehq.com, getacme.com"
- "Find me a domain for a pet grooming business"
- "I'm building a fintech app called PayFlow, find me a domain"
## How It Works
DomainCheckr 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.
- Queries Verisign RDAP for .com/.net domains
- Queries PIR RDAP for .org domains
- Falls back to rdap.org for all other TLDs
- HTTP 404 = available, HTTP 200 = taken
No scraping, no third-party APIs, no rate-limited services. Direct registry queries.
## REST API
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`
## License
MIT