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Accept Encoding Rank
x402
Accept Encoding Rank 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).
Ranks supported content codings against HTTP Accept-Encoding header weights and returns a normalized pass/advisory result as deterministic versioned JSON.
Price / call$0.001
Success—
StatusUnknown
How this service works
Accept Encoding Rank: Accept Encoding Rank ranks supported content codings against Accept-Encoding weights from bounded caller-supplied values without an external provider. Call Accept Encoding Rank 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 Accept Encoding Rank as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, me…
Output
Returns versioned deterministic JSON containing normalized web evidence (the parsed Accept-Encoding weights and offered codings), a computed ranking of the offered codings by preference weight, and an explicit pass or advisory status indicating whether the negotiation is valid.
Example use cases
Pick encoding before caching HTTP response
“Before I cache this response, rank my supported encodings gzip, br, and identity against the Accept-Encoding header 'gzip;q=1.0, br;q=0.5' so I know which format to store.”
Validate encoding for proxy redirect
“I'm about to redirect a request through a proxy — check these offered codings ['br', 'gzip', 'zstd'] against the caller's Accept-Encoding header 'zstd;q=1.0, br;q=0.7, gzip;q=0.3' and give me the ranked result and pass/advisory status.”
Agent retry with correct encoding
“My agent got back a response and I want to retry with the right encoding — rank ['deflate', 'gzip', 'identity'] against Accept-Encoding 'gzip;q=1.0, deflate;q=0.6' before I retry the request.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/accept-encoding-rankWhen to prefer
Choose this endpoint when you need a deterministic, stateless, server-side computation of HTTP content encoding negotiation — especially before accepting, caching, redirecting, or retrying a web response. Prefer it over rolling your own Accept-Encoding parser when you need a normalized, versioned result with explicit pass/advisory output suitable for agent pipelines.
Side effects
- Malformed Accept-Encoding header value causes parsing failure or unexpected ranking output
- Offered codings list exceeds 256 items, triggering rejection
- Header string exceeds 8192 character limit
- Empty offers array returns no ranking with advisory status
- Unrecognized coding tokens may be ranked at lowest priority or flagged as unknown
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| header | string | Header supplied to Accept Encoding Rank; used only for this bounded calculation and processed in memory without retention. |
| offers | array | Offers supplied to Accept Encoding Rank; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"ranked": [
{
"offer": "br",
"quality": 1
},
{
"offer": "gzip",
"quality": 0.8
}
],
"selected": "br"
},
"schema": "delx/util-accept-encoding-rank/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "38b764e7204eb17f82ed20cce029e6a2c8cd6149a609fe91d9a2ab05143350ab",
"external_calls": 0
},
"operation": "web_reliability:accept_encoding_rank"
}
}Tags
x402
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