# SignalDesk AI Domain Validate

> SignalDesk AI Domain Validate is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Validates whether a given ASCII domain has correct syntax and verifies its existence

## Facts

- Endpoint: POST https://x402-agent.kariguetoazul.workers.dev/api/network/domain-validate?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-domain-validate-f44c27b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z9EULPDuMPyH0UE8_qrcu

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 signaldesk-ai-domain-validate-f44c27b4 -d '<json body>'
```

Example prompt: Can you check whether 'openai.com' is a valid domain name and verify that it actually exists on the internet?

## When to prefer this

Use this endpoint when you need a lightweight, low-cost ($0.001 USDC) check combining both syntax validation and existence verification in a single call. Prefer it over manual regex checks when you also need live DNS/existence confirmation. Ideal for pre-processing user-submitted domains, scrubbing lead lists, or gating workflows on domain validity before more expensive downstream operations.

## Known failure modes

- Domain string exceeds 512 characters — request rejected
- Invalid or missing 'domain' field in request body — validation error returned
- Payment not provided or insufficient — 402 Payment Required response
- Domain lookup timeout or DNS resolution failure — exists_verified may return false even for real domains
- Non-ASCII characters in domain string — may fail syntax check or be rejected

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

Returns a JSON object with two boolean fields: 'valid_syntax' indicating whether the domain string conforms to proper ASCII domain name syntax, and 'exists_verified' indicating whether the domain has been confirmed to exist (e.g. resolves in DNS).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "maxLength": 512,
   "description": "ASCII domain."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "valid_syntax": true,
  "exists_verified": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-domain-validate-f44c27b4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)