Zero-signup business-day date-math API: add days, count days between dates, is-business-day.
A zero-signup business-day / working-day date-arithmetic API. No account, no API key — one GET request. Add or subtract working days, count business days between two dates, or test whether a date is a business day — with your own holiday list. Pure UTC date math, returned as JSON. Built so autonomous AI agents get a deterministic date endpoint — an agent has no human to do a signup, and LLMs are…
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A zero-signup business-day / working-day date-arithmetic API. No account, no API key — one GET request. Add or subtract working days, count business days between two dates, or test whether a date is a business day — with your own holiday list. Pure UTC date math, returned as JSON. Built so autonomous AI agents get a deterministic date endpoint — an agent has no human to do a signup, and LLMs are measurably unreliable at date arithmetic. Any error returns JSON with an key and an appropriate HTTP…