# Domain DNS Check

> Domain DNS Check is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns a comprehensive DNS profile for a single domain including registration status, A/AAAA records, nameservers, MX, SPF, DMARC, DNSSEC, and parked-site detection in one call.

## Facts

- Endpoint: POST https://flat-rate-llm.kikoribera03.workers.dev/v1/red/domain-check
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-dns-check-a32a249e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_M5e0CVaHFXxKCTrISp_4x

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 domain-dns-check-a32a249e -d '<json body>'
```

Example prompt: Can you do a full DNS check on acmecorp.io — I want to know if it's registered, what IPs it resolves to, whether it has email set up, and if DNSSEC is enabled?

## When to prefer this

Prefer this endpoint when you need a comprehensive, all-in-one DNS snapshot of a single domain without setting up an account or API key. It is ideal for agents iterating through a list of domains one at a time, checking deliverability before sending email, auditing domain infrastructure, or verifying security posture. Unlike raw DNS tools, it synthesizes multiple record types and adds higher-level flags (parked, hasWebsite, acceptsEmail) in a single call.

## Known failure modes

- Domain not found or unregistered — registered field returns false with empty record arrays
- Invalid domain input — malformed string that cannot be reduced to a valid hostname
- DNS timeout — live DNS query takes too long and returns an error
- Transient DNS resolution failure — upstream resolver unavailable
- Payment not received — x402 payment required error if USDC payment is missing or insufficient

## How this service works

60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.

## Output

A JSON object containing: the normalized domain string, a boolean for registration status, arrays of A (IPv4) and AAAA (IPv6) address records, nameserver records, MX server records, a boolean for DNSSEC, a boolean for whether the domain appears parked, a boolean for whether it has an active website, and a boolean for whether it accepts email.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string",
   "description": "The domain to check. A full URL or an email address is accepted and reduced to its host."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "a": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "mx": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "aaaa": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "dnssec": {
   "type": "boolean"
  },
  "domain": {
   "type": "string"
  },
  "parked": {
   "type": "boolean"
  },
  "hasWebsite": {
   "type": "boolean"
  },
  "registered": {
   "type": "boolean"
  },
  "nameservers": {
   "type": "array",
   "items": {
    "type": "object"
   }
  },
  "acceptsEmail": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-dns-check-a32a249e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from flat-rate-llm.kikoribera03.workers.dev](https://www.zero.xyz/host/flat-rate-llm.kikoribera03.workers.dev/llms.txt)