# DNS CAA contactemail Record Lookup

> DNS CAA contactemail Record Lookup is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-23).

Retrieves CAA (Certification Authority Authorization) DNS records with the 'contactemail' tag for a given hostname

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/dns-caa-contactemail?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-caa-contactemail-record-lookup-930801e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sLkgMJtKYk2FIOUswzxlH

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 dns-caa-contactemail-record-lookup-930801e1 -d '<json body>'
```

Example prompt: Can you look up the CAA contactemail DNS record for example.com and tell me what contact email address is listed there?

## When to prefer this

Use this endpoint when you specifically need CAA DNS records filtered to the 'contactemail' tag, such as identifying domain security contacts for certificate management workflows or domain audits. Prefer this over a generic DNS lookup tool when you only need the CAA contactemail tag and want a focused, structured response without parsing raw DNS output.

## Known failure modes

- Hostname does not exist in DNS — returns empty or error response
- No CAA records with contactemail tag exist for the hostname — returns empty result
- Malformed hostname input exceeding 253 characters — schema validation error
- DNS resolution timeout or upstream DNS failure — returns error
- Payment not included — returns 402 Payment Required

## How this service works

Call when an agent needs CAA records whose tag is contactemail. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/dns-caa-contactemail first.

## Output

Returns the CAA DNS record(s) with the 'contactemail' tag for the given hostname, including the associated contact email address value(s) as published in DNS.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "hostname": {
   "type": "string",
   "examples": [
    "example.com"
   ],
   "maxLength": 253,
   "minLength": 1,
   "description": "Public DNS hostname such as example.com. Not a URL, not an IP literal, and not a private name."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dns-caa-contactemail-record-lookup-930801e1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)