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Delx Commerce — Accept-Encoding Rank
x402
Delx Commerce — Accept-Encoding Rank 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).
Ranks and selects the best HTTP Accept-Encoding compression format from a list of offers given an Accept-Encoding header value
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
A JSON object containing a ranked array of encoding offers (each with offer name and quality score), the selected best encoding string, the operation name, pass/fail status, and evidence metadata including input SHA-256 hash, a flag confirming no data retention, and a count of zero external calls made.
Example use cases
HTTP server compression negotiation
“I'm building an HTTP server response pipeline — given the client's Accept-Encoding header 'gzip, br;q=0.9, identity;q=0.5' and my supported encodings ['gzip','br','identity'], tell me which encoding I should use and in what priority order.”
API gateway encoding selection
“My API gateway received a request with Accept-Encoding header 'deflate;q=0.6, gzip;q=0.9, br;q=1.0' and I support ['br','gzip']. Rank those offers and tell me the best one to pick.”
Validating encoding negotiation logic
“I want to verify that the encoding I'd pick is correct — the client sent Accept-Encoding 'gzip;q=1.0, br;q=0.5' and the only offer I have is ['gzip','br']. Rank them and confirm which wins.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/accept-encoding-rank?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a deterministic, verifiable, auditable computation of HTTP Accept-Encoding negotiation without any side effects or external calls. It is ideal for AI agents that need a provably correct answer (with SHA-256 evidence) at extremely low cost ($0.001 USDC) without requiring signup or session management. Prefer it over implementing Accept-Encoding parsing in-process when auditability or correctness guarantees matter, or when running in a sandboxed agent environment.
Side effects
- Malformed or empty Accept-Encoding header string may produce unexpected rankings or an error
- Encoding offers list exceeding 256 items is rejected by schema validation
- Header string exceeding 8192 characters is rejected
- Payment failure via x402 protocol results in 402 response before computation begins
- Unrecognized or non-standard encoding token names may be passed through without quality normalization
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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