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AgentTools Domain Availability Checker
x402
AgentTools Domain Availability Checker is a paid API for AI agents from agenttools-hub.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Checks if a domain name is registered or available using the official RDAP registry protocol, returning registrar and registration dates for taken domains.
Price / call$0.001
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
Returns a status indicating whether the domain is available (HTTP 404 from RDAP = available) or registered. For registered domains, returns the registrar name, creation date, and expiration date in structured form.
Example use cases
Product naming domain check
“I'm launching a new app called NovaSpark — can you check if novaspark.io is taken or still available to register?”
Business legitimacy verification
“I'm about to sign a contract with a company. Can you look up how long their domain techventures.com has been registered and who the registrar is?”
Domain expiry monitoring
“Check when pivotlab.com is set to expire — I want to know if it's coming up for renewal soon so I can try to grab it.”
Technical details
Endpoint
GEThttps://agenttools-hub.vercel.app/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 webpage scrape or a parking-page check. It also returns registrar and date metadata in one call, making it ideal for both availability checks and basic business due diligence without needing a separate WHOIS lookup.
Side effects
- Domain query fails if the TLD is not supported by RDAP protocol
- Invalid or malformed domain name returns an error
- Network timeout if RDAP registry is slow to respond
- Some ccTLDs may not have RDAP support and return no data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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