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Delx ETag Match
x402
Delx ETag Match is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Compares two ETag validators (including weak ETags and If-None-Match lists) and returns a deterministic JSON result indicating whether they match
Price / call$0.001
Success—
StatusUnknown
How this service works
Compare ETag validators including weak tags and If-None-Match lists — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls. Sibling of Delx routes that alr…
Output
Returns a deterministic JSON object indicating whether the provided ETag matches the comparison ETag or If-None-Match list, including handling for weak ETag comparison rules and multi-value match lists.
Example use cases
HTTP cache freshness check
“I have a stored ETag of '"v2-xyz789"' and the client sent an If-None-Match header with '"v1-abc", "v2-xyz789"' — do these match so I can return a 304?”
Weak ETag equivalence test
“Check if the weak ETag W/"etag-001" matches W/"etag-001" using weak comparison rules — I need to know if these count as equivalent.”
Conditional request preflight
“Before I process this PUT request, can you verify whether the ETag '"doc-v3"' matches the If-None-Match value '"doc-v1", "doc-v2"' so I know if I should proceed or return 412?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/etag-matchWhen to prefer
Use this endpoint when you need a stateless, deterministic, zero-side-effect ETag comparison without implementing the RFC 7232 matching logic yourself — especially for agent preflight checks before conditional HTTP requests, cache validation pipelines, or micro-utility workflows where correctness of weak vs strong ETag semantics matters.
Side effects
- Malformed or missing etag input returns an error response
- Invalid ETag format (missing quotes or bad syntax) may produce unexpected results
- If-None-Match list with malformed entries may fail to parse correctly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| etag | string | Input field: etag. |
| other | string | Input field: other. |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"mode": "list",
"match": true,
"schema": "delx/util-etag-match/v1",
"weak_a": false
}
}Tags
x402
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