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Cookie Domain Match
x402
Cookie Domain Match 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).
Evaluates whether a cookie's Domain attribute matches a request host according to RFC host-only and Domain cookie matching rules, returning a deterministic pass/advisory verdict.
Price / call$0.001
Success—
StatusUnknown
How this service works
Cookie Domain Match: Cookie Domain Match evaluates host-only or Domain cookie matching for a request host from bounded caller-supplied values without an external provider. Call Cookie Domain Match 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 Cookie Domain Match as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memor…
Output
Returns versioned deterministic JSON containing: normalized web evidence (the sanitized input values), the computed cookie domain match finding (whether a host-only or Domain-attribute match succeeded), and an explicit pass or advisory status indicating whether the cookie is considered valid for the request host.
Example use cases
Cookie scope check before caching
“Before I cache this web response, verify whether the cookie domain '.mybank.com' is a valid match for the request host 'secure.mybank.com' — give me a pass or advisory verdict.”
Cookie validation in redirect handling
“I'm about to follow a redirect and I need to know if the cookie domain 'sub.shop.io' properly matches the request host 'shop.io' under RFC host-only cookie matching rules before accepting it.”
Retry safety check for cookie scope
“Can you check if the cookie domain '.staging.internal.corp' is correctly scoped to the request host 'api.staging.internal.corp' before my agent retries the request?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/cookie-domain-matchWhen to prefer
Use this endpoint when an agent needs a deterministic, RFC-compliant ruling on whether a cookie's Domain attribute (or host-only flag) applies to a given request host — particularly before accepting, caching, redirecting, or retrying a caller-supplied web response. Prefer this over custom logic when you need an auditable, versioned, stateless ruling that can be embedded in a pipeline without side effects or external lookups.
Side effects
- Missing or empty request_host or cookie_domain fields returns a validation error
- Malformed hostnames (e.g. containing invalid characters) may produce an advisory/fail status
- Inputs exceeding 8192 characters are rejected
- Payment not included or insufficient USDC balance causes x402 payment failure
- Network or service unavailability returns an HTTP error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_host | string | Request Host supplied to Cookie Domain Match; used only for this bounded calculation and processed in memory without retention. |
| cookie_domain | string | Cookie Domain supplied to Cookie Domain Match; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"host": "api.example.com",
"domain": "example.com",
"matched": true
},
"schema": "delx/util-cookie-domain-match/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "a57277a00c736509ccdbdcbce69bc2a0db8554bde0c9b457722c07c13b3b210c",
"external_calls": 0
},
"operation": "web_reliability:cookie_domain_match"
}
}Tags
x402
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