# Startup Domain Check

> Startup Domain Check is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Checks whether a domain name is registered, retrieves its registrar, and returns its expiration date — useful for validating startup or product domain availability and ownership.

## Facts

- Endpoint: GET https://anibalb.duckdns.org/x402/startup-domain-check?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/startup-domain-check-86e96f0f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XnhDUQe3Wr1vMyYfa1POX

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 startup-domain-check-86e96f0f
```

Example prompt: Can you check if myapp.com is registered, who the registrar is, and when it expires?

## When to prefer this

Choose this endpoint when you need a quick, no-account-required lookup of domain registration status, registrar identity, and expiration date — especially in startup or product-naming workflows where you want to verify availability or ownership without signing up for a WHOIS service. Ideal for AI agents that pay per call in USDC via x402 and need lightweight domain intelligence.

## Known failure modes

- Domain not found or invalid TLD — may return registered: false or an error
- Network timeout if WHOIS upstream is slow
- Unsupported TLD where WHOIS data is unavailable
- Payment failure via x402 if USDC balance is insufficient

## How this service works

Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.

## Output

Returns a JSON object with the domain name, whether it is registered (boolean), the registrar company name, and the expiration date in ISO format (e.g. 2027-10-01).

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "domain": "myapp.com",
  "registrar": "Namecheap",
  "expiration": "2027-10-01",
  "registered": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/startup-domain-check-86e96f0f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from anibalb.duckdns.org](https://www.zero.xyz/host/anibalb.duckdns.org/llms.txt)