# AgentTools Domain Availability Checker

> 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.

## Facts

- Endpoint: GET https://agenttools-hub.vercel.app/api/v1/dev/domain-availability?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agenttools-domain-availability-checker-48c89699
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Pc421jJzFrfAvM2zmPN9n

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agenttools-domain-availability-checker-48c89699
```

Example prompt: Can you check if morningbloom.com is available to register, and if it's taken, tell me who the registrar is and when it was created?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agenttools-domain-availability-checker-48c89699/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agenttools-hub.vercel.app](https://www.zero.xyz/host/agenttools-hub.vercel.app/llms.txt)