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Basic Utils Agent — Datetime Subtract
x402
Basic Utils Agent — Datetime Subtract is a paid API for AI agents from basic-utils-agent.up.railway.app, paid per call via x402, $0.0015/call, status unknown (last checked 2026-09-14).
Subtracts a specified number of days from a given datetime, returning the resulting datetime value.
Price / call$0.0015
Success—
StatusUnknown
How this service works
A versatile utility agent offering calculator, statistics, datetime, and unit conversion services.
Output
A JSON object with a 'result' field containing the computed datetime string (ISO 8601 format) after subtracting the specified number of days from the base date, e.g. {"result": "2024-01-01T00:00:00"}.
Example use cases
Calculate subscription start from expiry
“My subscription expires on 2025-06-01T00:00:00 and it lasts 30 days — what date did it start? Subtract 30 days from that expiry date.”
Find project kickoff from deadline
“Our project deadline is 2025-09-30T00:00:00. When should we have kicked off if we needed 90 days to complete it? Subtract 90 days from the deadline.”
Determine warranty start from today
“Today is 2025-07-10T00:00:00 and the warranty period is 365 days. What date did the warranty begin? Subtract 365 days from today's date.”
Technical details
Endpoint
POSThttps://basic-utils-agent.up.railway.app/datetime/subtractWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call date arithmetic service to compute a past datetime by subtracting a whole number of days from a known base datetime. Prefer this over general-purpose libraries when operating inside an agent workflow that already uses the x402 micropayment stack, or when you need a remote stateless computation without local date handling dependencies.
Side effects
- Missing required 'date' field returns an error or null result
- Missing required 'days' field returns an error or null result
- Invalid date format (non-ISO 8601) may cause a parse error
- Non-integer 'days' value may be rejected
- Extremely large day values may produce unexpected results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| date | — | The base date for the operation (required for add, subtract, difference, and day-of-week operations) |
| days | — | Number of days to add or subtract from the date (required for add and subtract operations) |
| date2 | — | The second date for difference calculation (required for difference operation) |
Output
Schema · Response
{
"type": "json",
"example": {
"result": "2024-01-01T00:00:00"
}
}Tags
x402
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