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Delx Commerce — Referrer Policy Check
x402
Delx Commerce — Referrer Policy Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Validates whether an HTTP Referrer-Policy header value is accepted against a list of allowed policy values
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object indicating whether the provided referrer-policy value is accepted, including the matched value, a pass/fail status, the operation name, and evidence metadata such as whether input was retained, its SHA-256 hash, and the number of external calls made (always 0 — fully in-memory).
Example use cases
Web security audit referrer policy
“I'm auditing my site's HTTP headers. Can you check if the referrer policy 'strict-origin-when-cross-origin' is one of the accepted values in this list: 'no-referrer', 'same-origin', 'strict-origin-when-cross-origin'?”
CI pipeline header validation
“In my deployment pipeline, verify that the referrer-policy value 'origin' is acceptable given the allowed policies are 'strict-origin' and 'strict-origin-when-cross-origin'.”
Web reliability check for agent crawl
“Before indexing this page, check whether its referrer-policy header value 'unsafe-url' is among the allowed policies: 'no-referrer', 'strict-origin', 'strict-origin-when-cross-origin'.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/referrer-policy-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call, no-signup validation of HTTP Referrer-Policy header values against a custom allowed list — especially in agent pipelines requiring verifiable, in-memory-only processing with no data retention. Prefer it over building custom logic when auditability (input SHA-256, zero external calls) matters for compliance or CI checks.
Side effects
- Invalid or missing 'value' field returns an error
- Allowed list exceeds 256 items or individual strings exceed 8192 characters may be rejected
- Malformed JSON body returns a parse error
- Non-string values in the allowed array may cause schema validation failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | string | Value supplied to Referrer Policy Check; used only for this bounded calculation and processed in memory without retention. |
| allowed | array | Allowed supplied to Referrer Policy Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"value": "strict-origin-when-cross-origin",
"accepted": true
},
"schema": "delx/util-referrer-policy-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "d9c8b9b264fe994897afb78430721e7bed86899de05bf6d219f03a39c301eaa1",
"external_calls": 0
},
"operation": "web_reliability:referrer_policy_check"
}
}Tags
x402
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