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DNS TLSA Record Shape Check
x402
DNS TLSA Record Shape Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Validates the structural shape of a DNS TLSA record by checking usage, selector, matching type, and certificate data fields, returning a deterministic pass/advisory result.
Price / call$0.001
Success—
StatusUnknown
How this service works
DNS TLSA Record Shape Check: DNS TLSA Record Shape Check checks TLSA usage, selector, matching type, and certificate data shape from bounded caller-supplied values without an external provider. Call DNS TLSA Record Shape 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 TLSA Record Shape Check as versioned deterministic JSON. Price: $0.001 USDC via x402…
Output
Returns a versioned deterministic JSON object containing normalized web evidence derived from the input, a computed finding describing what was evaluated, and an explicit pass or advisory status indicating whether the TLSA record's structure (usage, selector, matching type, and certificate data) is valid.
Example use cases
Preflight TLSA before caching
“Before I cache this TLSA record from the response, can you validate its shape — usage, selector, matching type, and cert data — to make sure it's well-formed? The record is '2 0 1 aabbccdd1122...'”
DANE implementation sanity check
“I'm building a DANE validator and want to confirm this TLSA record passes a shape check: '3 1 2 deadbeef9900aa...' — can you tell me if the usage, selector, and matching type fields are structurally valid?”
Redirect safety check on web response
“I just got a web response I need to redirect through, and it includes a TLSA record '1 1 1 f00ba4cafe...' — can you run a shape check on it before I proceed, so I know the structure is correct?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/dns-tlsa-record-shape-checkWhen to prefer
Choose this endpoint when you need a fast, deterministic, no-external-dependency structural check on a TLSA record before accepting, caching, redirecting, or retrying a caller-supplied web response. It does not perform live DNS lookups or cryptographic verification — it validates the shape and field values only, making it ideal as a lightweight preflight step in DANE-aware agents or security pipelines.
Side effects
- Record string exceeds 8192 character limit — rejected with validation error
- Malformed or unparseable record input — returns advisory status with finding detail
- Missing required fields in TLSA record — advisory status returned
- Empty record string — likely returns error or advisory with missing-data finding
- Payment not completed via x402 — request not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| record | string | Record supplied to DNS TLSA Record Shape Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"fields": [
"3",
"1",
"1",
"AABBCCDDEEFF00112233445566778899"
],
"shape_valid": true
},
"schema": "delx/util-dns-tlsa-record-shape-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "196aa204b00dfac705caab97f837b021d005fd5bf93f628bbea265486ff16a9c",
"external_calls": 0
},
"operation": "web_reliability:dns_tlsa_record_shape_check"
}
}Tags
x402
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