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WebRef Weekday Lookup
x402
WebRef Weekday Lookup is a paid API for AI agents from webref.johnaio281.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-22).
Returns the day-of-week name for a given date, with configurable week-start (Sunday or Monday)
Price / call$0.003
Success—
StatusUnknown
How this service works
Web standards and time reference for AI agents: HTTP status codes with what the client should do, retry semantics, MIME types and content-type matching, request-method safety and idempotency, plus deadline arithmetic - time until a moment, weekday and business-day checks, duration conversion and Unix timestamps. Pay per call in USDC on Base via x402 or USDC on Tempo via MPP. No signup, no API key, no KYC.
Output
Returns the name of the weekday (e.g. 'Monday', 'Friday', 'Sunday') for the specified date, calculated relative to the configured week-start convention (Sunday or Monday).
Example use cases
Scheduling meeting on correct weekday
“What day of the week does April 1, 2025 fall on? I want to make sure I'm not scheduling something on a weekend — use Monday as the week start.”
Holiday day-of-week check
“Tell me what day of the week Christmas Day (December 25, 2025) falls on, with Sunday as the start of the week.”
Event planning date verification
“I'm planning an event for September 30, 2026 — what day of the week is that? Use Sunday-based weeks.”
Technical details
Endpoint
GEThttps://webref.johnaio281.workers.dev/api/time/weekday_of?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call weekday lookup for a specific date without needing a full calendar API. Ideal for agents that need to verify which day of the week a date falls on, especially when they also need other web/time reference utilities from the same service (HTTP status codes, MIME types, duration math). No API key or signup required — perfect for stateless agent workflows.
Side effects
- Invalid or unparseable date string returns an error
- Missing required date parameter returns a validation error
- Unsupported weekStartsOn value (not 'sunday' or 'monday') causes a bad request
- Malformed query parameters may return a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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