{"uid":"cap_T26B3btqCl1N4Q0r0t-vv","slug":"signaldesk-ai-day-of-week-lookup-c930e187","name":"SignalDesk AI – Day of Week Lookup","description":"Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.","url":"https://x402-agent.kariguetoazul.workers.dev/api/date/day-of-week?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"date":{"type":"string","pattern":"^\\d{4}-\\d{2}-\\d{2}$","maxLength":10,"minLength":10,"description":"Gregorian date YYYY-MM-DD, interpreted in UTC."}}},"responseSchema":{"type":"json","example":{"weekday":"Friday","iso_weekday":5}},"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_Z8u5RoCDLkeyzrTXCzrKx","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 weekday name and ISO weekday number for a given Gregorian calendar date (UTC)","exampleAgentPrompt":"What day of the week is 2025-12-25?","exampleUseCases":[{"title":"Holiday weekday check","prompt":"Can you tell me what day of the week Christmas falls on this year — is 2025-12-25 a weekday or a weekend?"},{"title":"Birthday weekday lookup","prompt":"My friend was born on 1990-07-14 — what day of the week was that?"},{"title":"Meeting deadline planning","prompt":"What day of the week is 2026-03-31? I need to know if our quarter-end deadline lands on a weekday."}],"resultDescription":"A JSON object containing the English weekday name (e.g. 'Friday') and the ISO weekday integer (1 = Monday through 7 = Sunday) for the supplied date, interpreted in UTC.","failureModes":["Invalid date format (not YYYY-MM-DD) returns a 4xx error","Out-of-range date values (e.g. month 13) return a validation error","Missing 'date' field in request body causes a bad-request response","Payment not included or insufficient results in x402 Payment Required response"],"whenToPreferThis":"Use this endpoint when you need a reliable, authoritative weekday name or ISO weekday number for an arbitrary Gregorian date without writing date-math logic yourself. It is especially useful for agents handling scheduling, deadline validation, or calendar-aware workflows where getting the correct day of week for a specific UTC date is critical and must be programmatically confirmed rather than estimated.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:42:15.169Z","isFirstParty":false,"canonicalSlug":"signaldesk-ai-day-of-week-lookup-c930e187"}