Developers & AI agents
Machine-readable endpoints, OpenAPI, and stable URLs for domain check automation.
Agent discovery files
- llms.txt — language version index
- llms-ru.txt — full Russian description
- llms-en.txt — full English description
- ai.txt — short index for AI crawlers
- ai-ru.txt / ai-en.txt — short language-specific versions
- openapi.json — OpenAPI 3.1 (public spec)
- sitemap.xml — sitemap
Stable check URLs
Use instead of ?q= forms for interactive checks. These results are stable for users but carry noindex and are excluded from sitemaps.
/check/example.com— full summary/lookup/whois/example.com— WHOIS/lookup/dns/example.com— DNS/zones/ru— search in zone
Agent API
Base URL: https://domaintools.site/api/v1/
API may be disabled on some deployments. When enabled, X-API-Key is required.
FAQ
For Agent API — yes when AGENT_API_ENABLED=1. OpenAPI and llms.txt are public.
Use Agent API for JSON or /check/ and /lookup/ for interactive HTML. All dynamic results carry noindex.
See llms.txt: typically 20–30 req/min per IP. On 429, wait and retry.