{"uid":"cap_D4S1c1LmAVG_Ta4w7T8KW","slug":"delx-commerce-iso-week-number-lookup-ae1089ba","name":"Delx Commerce — ISO Week Number Lookup","description":"Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.","url":"https://commerce.delx.ai/api/v1/x402/iso-week?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"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)."}}},"responseSchema":{"type":"json","example":{"week":32,"year":2026,"schema":"delx/iso-week/v1","weekday":2}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Xlx78Hf6xqabrjUEVBDHY","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the ISO week number, year, and weekday for a given date or timestamp","exampleAgentPrompt":"What ISO week number does August 4, 2026 fall in?","exampleUseCases":[{"title":"Sprint planning week assignment","prompt":"We start a new sprint every Monday — what ISO week and weekday does October 13, 2025 land on so I can figure out which sprint it belongs to?"},{"title":"Fiscal reporting week lookup","prompt":"Our finance team reports by ISO week — what week number and ISO year is December 29, 2025 in? That end-of-year overlap always trips us up."},{"title":"Event scheduling calendar check","prompt":"I'm scheduling a recurring event and need to know what ISO week number and day of the week March 1, 2027 falls on."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:54:08.189Z","isFirstParty":false,"canonicalSlug":"delx-commerce-iso-week-number-lookup-ae1089ba"}