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AgentTools Domain Availability Checker
x402
AgentTools Domain Availability Checker is a paid API for AI agents from agentstoolshub.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-12).
Checks whether a domain name is registered or available using the RDAP protocol, returning registrar and registration dates for taken domains
Price / call$0.003
Success—
StatusUnknown
How this service works
Check whether a domain name is registered or available, via the official RDAP registry protocol (404 = available). For registered domains it also returns the registrar and creation/expiration dates — useful when an agent needs to name a product or verify how long a business has existed. Use this when an agent needs to is this domain taken? Registry answer, not a landing page.
Output
For available domains: a 404-equivalent indicating the domain is unregistered and free to claim. For registered domains: availability status (taken), the registrar name, and the creation and expiration dates of the registration, sourced directly from the official RDAP registry.
Example use cases
Startup domain name search
“I'm about to launch a productivity app called FocusLoop — can you check if focusloop.com is available or already taken?”
Verify competitor domain age
“Can you look up acmecorp.com and tell me when it was first registered and who the registrar is? I want to know how long this company has been around.”
Bulk product naming check
“We're brainstorming product names — can you check if 'velora.ai' is available to register right now?”
Technical details
Endpoint
GEThttps://agentstoolshub.com/api/v1/dev/domain-availability?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need an authoritative, registry-level answer about whether a domain is registered — not a scrape of a landing page or a third-party whois aggregator. Ideal when an agent needs to confirm domain availability before recommending a product name, or needs accurate registration metadata (creation/expiration dates, registrar) to assess how established a business is. Prefer this over general web search when a precise, machine-readable, RDAP-compliant answer is required at low cost.
Side effects
- Domain not found in RDAP registry (interpreted as available — 404 response)
- Invalid or malformed domain name input returns an error
- TLD not supported by RDAP may yield incomplete or no data
- Network timeout if the authoritative RDAP server is slow to respond
- Newly registered domains may not yet appear in RDAP due to propagation delay
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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