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DNS CAA Policy Check
x402
DNS CAA Policy Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Checks whether a certificate authority identifier is permitted by DNS CAA records, returning a deterministic pass/advisory verdict as structured JSON.
Price / call$0.001
Success—
StatusUnknown
How this service works
DNS Caa Policy Check: DNS Caa Policy Check checks whether a certificate authority identifier is allowed by CAA records from bounded caller-supplied values without an external provider. Call DNS Caa Policy Check before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for DNS Caa Policy Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, s…
Output
Returns versioned deterministic JSON containing: normalized CAA record evidence, the computed policy finding, and an explicit pass or advisory status indicating whether the supplied issuer identifier is authorized by the provided CAA records.
Example use cases
Pre-issuance CA authorization check
“Before we proceed with issuing a TLS certificate, check whether 'digicert.com' is authorized as an issuer by these CAA records I've collected from the DNS zone — give me a pass or advisory verdict.”
Automated TLS pipeline validation
“We're about to cache a web response that came with a certificate from 'sectigo.com' — run a CAA policy check against these DNS CAA records first and tell me if the issuer is explicitly allowed.”
Security audit of CAA record compliance
“I need to audit whether our current CAA records actually permit 'letsencrypt.org' as a certificate authority — run a policy check and return the full finding with evidence so I can review it.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/dns-caa-policy-checkWhen to prefer
Prefer this endpoint when you need a fast, deterministic, serverless CAA policy check without relying on live DNS resolution — it evaluates caller-supplied records and issuer in-memory, making it ideal for pre-issuance validation pipelines, caching decisions, or security audits where you already have the CAA records and want a structured, versioned verdict without external DNS dependencies.
Side effects
- Malformed issuer string causes validation error
- Records array exceeds 256-item limit returns error
- Individual record objects exceeding 128-property limit rejected
- Missing required fields returns 400-level error
- Ambiguous or empty issuer may produce advisory rather than pass
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| issuer | string | Issuer supplied to DNS Caa Policy Check; used only for this bounded calculation and processed in memory without retention. |
| records | array | Records supplied to DNS Caa Policy Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"issuer": "letsencrypt.org",
"permitted": true
},
"schema": "delx/util-dns-caa-policy-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "b0ce3b06dcfb1237aa32eef6c1398ecd3e5f4811ddf5558614373560166e3b1e",
"external_calls": 0
},
"operation": "web_reliability:dns_caa_policy_check"
}
}Tags
x402
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