# Delx Commerce — ISO Week Number Lookup

> Delx Commerce — ISO Week Number Lookup 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).

Returns the ISO week number, year, and weekday for a given date or timestamp

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/iso-week?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-iso-week-number-lookup-ae1089ba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D4S1c1LmAVG_Ta4w7T8KW

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-commerce-iso-week-number-lookup-ae1089ba -d '<json body>'
```

Example prompt: What ISO week number does August 4, 2026 fall in?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call ISO week number computation without signup or API key management. Ideal for AI agents that need calendar week context on demand and want verifiable, micropayment-gated results via x402 on Base or Solana. Prefer this over custom date libraries when you want a simple HTTP call with guaranteed output schema.

## Known failure modes

- Invalid or malformed date string returns an error — date must be ISO-8601 formatted (e.g. 2026-08-04 or 2026-08-04T12:00:00Z)
- Missing date field in request body may result in a 400 bad request
- Payment failure via x402 protocol results in 402 Payment Required if USDC payment is not completed

## 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 with the ISO week number (week), ISO year (year), ISO weekday (weekday, Monday=1), and a schema identifier string (schema: 'delx/iso-week/v1') for the given date.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "date": {
   "type": "string",
   "format": "date-time",
   "description": "ISO-8601 date or timestamp (e.g. 2026-08-04 or 2026-08-04T12:00:00Z)."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "week": 32,
  "year": 2026,
  "schema": "delx/iso-week/v1",
  "weekday": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-iso-week-number-lookup-ae1089ba/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)