OpenLabor Domain Checker
Check domain name availability in bulk using RDAP and DNS lookups.
API
Base URL: https://domain-checker.openlabor.workers.dev
Endpoints
GET /check?domains=example.com,example.ai
Check availability of one or more domains (max 20 per request).
Response:
{
"count": 2,
"available": 1,
"taken": 1,
"results": [
{ "domain": "example.com", "available": false },
{ "domain": "example.ai", "available": true }
]
}
GET /tlds
List supported TLDs with built-in RDAP servers.
Response:
{ "supported": ["com", "net", "org", "ai", "dev", "app", "xyz", "cc", "tv"] }
GET /
API info and endpoint documentation.
Usage
When asked to check if a domain is available, call the /check endpoint with a comma-separated list of domains. Report results clearly — which are available and which are taken.
For TLDs not in the built-in list, the API will attempt IANA RDAP bootstrap lookup, then fall back to DNS-based checking via Cloudflare DoH.
Examples
- "Is acme.com available?" →
GET /check?domains=acme.com - "Check acme across .com, .ai, .dev" →
GET /check?domains=acme.com,acme.ai,acme.dev - "What TLDs can you check?" →
GET /tlds