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Delx Commerce — Accept-Language Rank
x402
Delx Commerce — Accept-Language 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 a list of language/locale offer strings against an HTTP Accept-Language header and returns them sorted by quality score with the best match selected
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
Returns a JSON object containing a ranked array of language offer objects each with the offer string and its computed quality score (0–1), plus a 'selected' field naming the top-ranked match. Also includes an evidence block confirming no data was retained, an input SHA-256 hash, zero external calls, and schema/status metadata.
Example use cases
Locale selection for multilingual website
“I have a visitor with the Accept-Language header 'fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.6' and my site supports 'en', 'fr', 'de', and 'es' — which language should I serve them and in what priority order?”
Translation fallback chain for API response
“My API received a request with Accept-Language 'zh-TW,zh;q=0.8,en;q=0.5' and I can respond in 'en', 'zh-CN', 'zh-TW', or 'ja' — rank those options so I know which translation to use first and what to fall back to.”
Email campaign language targeting
“A subscriber's browser sent Accept-Language 'es-MX,es;q=0.9,en;q=0.4' — I have email templates in 'en', 'es', and 'pt-BR'. Which template should I send them, ranked by their preference?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/accept-language-rank?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, verifiable, privacy-safe Accept-Language parsing and locale negotiation without building your own parser. It is ideal for agents serving multilingual content who receive raw HTTP headers and need to deterministically pick a locale from a supported set. Prefer it over custom parsing when you want an auditable evidence trail (SHA-256 input hash, no retention guarantee) and pay-per-call USDC pricing with no subscription or API key signup.
Side effects
- Malformed Accept-Language header string may produce unexpected quality scores or empty ranking
- Empty offers array returns an empty ranked list with no selection
- Offers array exceeding 256 items is rejected
- Header string exceeding 8192 characters is rejected
- Invalid locale codes in offers may be passed through unvalidated and ranked by textual match only
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| header | string | Header supplied to Accept Language Rank; used only for this bounded calculation and processed in memory without retention. |
| offers | array | Offers supplied to Accept Language Rank; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"ranked": [
{
"offer": "pt-BR",
"quality": 1
},
{
"offer": "en",
"quality": 0.7
},
{
"offer": "es",
"quality": 0.1
}
],
"selected": "pt-BR"
},
"schema": "delx/util-accept-language-rank/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "30f1c98209164e52a4430cbcc2c488f8df67d504f7b64f9f70e04e87dfc1bb24",
"external_calls": 0
},
"operation": "web_reliability:accept_language_rank"
}
}Tags
x402
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