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Etag Parse
x402
Etag Parse is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Parses an ETag header value to separate and classify weak vs. strong entity-tag semantics, returning a normalized finding and pass/advisory status.
Price / call$0.001
Success—
StatusUnknown
How this service works
Etag Parse: Etag Parse separates weak and strong entity-tag semantics from an ETag value from bounded caller-supplied values without an external provider. Call Etag Parse 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 Etag Parse as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-only execution with no paid upstr…
Output
Returns a versioned deterministic JSON object containing the normalized ETag value, the computed classification finding (weak or strong entity-tag semantics), and an explicit pass or advisory status indicating whether the ETag is suitable for strict cache validation or conditional request usage.
Example use cases
Cache validation before storing response
“Before I cache this HTTP response, can you parse the ETag value 'W/"67ab89"' and tell me whether it's a weak or strong tag so I know if strong cache validation is safe?”
Retry logic ETag check
“I'm about to retry a request and want to send an If-Match header — first parse this ETag '"abc-def-123"' to confirm it qualifies as a strong entity tag before I use it.”
Redirect response ETag classification
“I received a redirect response with ETag 'W/"v2.0-beta"' — can you classify whether that's a weak or strong entity tag and give me a normalized version of it?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/etag-parseWhen to prefer
Choose this endpoint when an agent needs a deterministic, stateless, and privacy-safe way to parse and classify ETag header values before caching, redirecting, retrying, or accepting HTTP responses. It is ideal when no external lookup or state retention is acceptable, and when a clear weak vs. strong entity-tag distinction is required for cache validation or conditional request logic.
Side effects
- Malformed or missing ETag value returns an advisory/fail status with parsing error details
- ETag string exceeding 8192 characters is rejected with a validation error
- Ambiguous or non-standard ETag formats may result in an advisory rather than pass status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| etag | string | Etag supplied to Etag Parse; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"weak": true,
"opaque_tag": "abc123"
},
"schema": "delx/util-etag-parse/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "3e4f08edcf8a21d5f8264a8e82262d4e0d629313c13c65043d6ea3f9a79fe515",
"external_calls": 0
},
"operation": "web_reliability:etag_parse"
}
}Tags
x402
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