# SiteCheck Web Intel - DNS CAA Records Lookup

> SiteCheck Web Intel - DNS CAA Records Lookup is a paid API for AI agents from api.webintel-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Retrieves CAA (Certification Authority Authorization) DNS records for a domain, showing which CAs are authorized to issue standard and wildcard certificates and the incident-report address.

## Facts

- Endpoint: GET https://api.webintel-api.workers.dev/api/security/dns-caa-records?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-web-intel-dns-caa-records-lookup-54d84d3c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OzG4JpeJ_zmnvYvm8fwc9

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 sitecheck-web-intel-dns-caa-records-lookup-54d84d3c
```

Example prompt: Can you look up the CAA records for stripe.com and tell me which certificate authorities are authorized to issue SSL certificates for it?

## When to prefer this

Use this endpoint when you specifically need CAA record data for a domain to audit certificate authority authorization policy. Prefer this over a general DNS lookup endpoint when you want structured, pre-parsed CAA output with clearly separated authorized issuers and wildcard issuers. Note that it only checks records on the exact domain name provided, not inherited records from parent zones — factor this in for subdomains.

## Known failure modes

- Domain has no CAA records — hasCaa returns false with empty records array
- Invalid or malformed domain name returns an error
- Domain does not exist in DNS — empty or error response
- CAA records exist only on parent domain — tool does not walk up the tree, so result may appear empty
- Network or resolver timeout from AdGuard DNS

## How this service works

Lists the CAA (Certification Authority Authorization) records published on a domain: which CAs may issue certificates (issue), wildcard certificates (issuewild) and the incident-report address (iodef). Shows the records on the exact name only; CAA is inherited from parent domains when a name has none, which this tool does not walk.

## Output

Returns a JSON object with the queried domain, a boolean indicating whether CAA records exist, the list of CAA records (each with tag, flags, and value), arrays of authorized standard and wildcard certificate issuers, and a timestamp. Source resolver URL is also included.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain name such as google.com (required)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "domain": "google.com",
  "hasCaa": true,
  "source": "https://dns.adguard-dns.com/resolve",
  "records": [
   {
    "tag": "issue",
    "flags": 0,
    "value": "pki.goog"
   }
  ],
  "checkedAt": "2026-10-23T09:38:38.582Z",
  "wildcardIssuers": [],
  "authorizedIssuers": [
   "pki.goog"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-web-intel-dns-caa-records-lookup-54d84d3c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.webintel-api.workers.dev](https://www.zero.xyz/host/api.webintel-api.workers.dev/llms.txt)