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ISO Week Number
x402
ISO Week Number 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).
Returns the ISO week number (and year context) for a given date, useful for weekly reporting buckets and standup cadence keys.
Price / call$0.001
Success—
StatusUnknown
How this service works
ISO week number. Call for weekly reporting buckets and standup cadence keys. Returns ISO week number (and year context) for a date. $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.
Output
A JSON object containing the ISO week number for the provided date, along with the ISO week year context (since ISO weeks can span year boundaries), returned as deterministic first-party JSON.
Example use cases
Weekly reporting bucket assignment
“I need to assign a weekly reporting bucket for March 15, 2026 — what ISO week number does that date fall into?”
Standup cadence key generation
“What is the ISO week number for 2025-11-03T09:00:00Z? I'm generating cadence keys for our weekly standups.”
Calendar week lookup for analytics
“Which ISO week of the year is 2026-01-01? I need to group some analytics data by calendar week.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/iso-weekWhen to prefer
Choose this endpoint when you need a deterministic, no-key, pay-per-call ISO week number lookup without any subscription or account setup. It is ideal for agents that need weekly bucket keys or standup cadence identifiers for arbitrary dates, especially in automated pipelines where reliability and zero-config access matter. Prefer this over building custom logic when correctness around year-boundary edge cases is important.
Side effects
- Invalid or malformed date string returns a structured validation error (not billed)
- Missing date field returns a validation error
- Dates near year boundaries may return a week year different from the calendar year (expected ISO 8601 behavior)
- Network or payment failure prevents the call from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| date | string | ISO-8601 date or timestamp (e.g. 2026-08-04 or 2026-08-04T12:00:00Z). |
Output
Schema · Response
{
"type": "json",
"example": {
"week": 32,
"year": 2026,
"schema": "delx/iso-week/v1",
"weekday": 2
}
}Tags
x402
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