Domain Availability Check API
Domain Availability Check API. Check whether a domain name is registered or likely available for registration. Uses RDAP registry data plus DNS fallback signals and returns a machine-readable availability verdict. Useful for AI agents, startup naming, brand checks, registrar pre-checks, domain search workflows, and domain intelligence automation. Paid per call via x402.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.002 USDC on Base to 0x0550…038B8. The signed payment is good for 5 minutes.
- Paid to
- 0x0550…038B8
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 2000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x0550779CFBc832657A8BB46BAC9f359A5ad038B8",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"domain": "example.com"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"tld": "com",
"domain": "example.com",
"method": "rdap",
"status": "registered",
"service": "domain_availability",
"signals": {
"dns_found": true,
"rdap_found": true,
"rdap_status": 200,
"rdap_supported": true,
"dns_record_count": 7
},
"available": false,
"checked_at": "2026-07-01T10:11:59+00:00",
"confidence": 0.98,
"registration": {
"events": {
"expiration": "2026-08-13T04:00:00Z",
"registration": "1995-08-14T04:00:00Z"
},
"statuses": [
"client transfer prohibited"
],
"registrar": "example registrar"
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"domain"
],
"properties": {
"domain": {
"type": "string",
"description": "Domain name to check, for example example.com"
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"tld": {
"type": "string"
},
"domain": {
"type": "string"
},
"method": {
"type": "string"
},
"status": {
"type": "string"
},
"service": {
"type": "string"
},
"signals": {
"type": "object",
"properties": {
"dns_found": {
"type": "boolean"
},
"rdap_found": {
"type": "boolean"
},
"rdap_status": {
"type": "integer"
},
"rdap_supported": {
"type": "boolean"
},
"dns_record_count": {
"type": "integer"
}
},
"additionalProperties": true
},
"available": {
"type": "boolean"
},
"checked_at": {
"type": "string"
},
"confidence": {
"type": "number"
},
"registration": {
"type": "object",
"properties": {
"events": {
"type": "object",
"properties": {
"expiration": {
"type": "string"
},
"registration": {
"type": "string"
}
},
"additionalProperties": true
},
"statuses": {
"type": "array",
"items": {
"type": "string"
}
},
"registrar": {
"type": "string"
}
},
"additionalProperties": true
}
},
"additionalProperties": true
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-07-05 17:38Z
- Last indexed by Roundhouse
- 2026-08-04 03:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 11:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 200
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Domain Availability Check API and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Domain%20Availability%20Check%20API' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://tools.ipintel.ai/domain-availability, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.