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WebRef Time Add Duration
x402
WebRef Time Add Duration 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).
Adds a specified duration (milliseconds, seconds, minutes, hours, days, or weeks) to a given timestamp and returns the resulting datetime
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 a computed datetime representing the original timestamp advanced by the specified amount and unit — typically as an ISO 8601 string and/or Unix timestamp, usable directly for scheduling, deadline tracking, or further time comparisons.
Example use cases
Deadline calculation for task scheduling
“My task started at 2024-07-01T08:00:00Z and needs to be done within 5 days — what's the exact deadline timestamp?”
Token expiry window computation
“If I issued a token at 2024-06-20T14:30:00Z, when does it expire after 3600 seconds?”
Meeting reminder offset
“I have an event at 2024-08-10T15:00:00Z and I want to send a reminder 30 minutes before — what timestamp should I schedule the reminder for? Use a negative amount if needed, or compute 2024-08-10T15:00:00Z minus 30 minutes.”
Technical details
Endpoint
GEThttps://webref.johnaio281.workers.dev/api/time/add_duration?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to perform reliable, server-side datetime arithmetic — adding a precise duration to a known base timestamp — without relying on the agent's own clock or date math, especially in contexts where deadline precision matters or when the agent's local time handling is unreliable.
Side effects
- Missing required 'amount' parameter returns a validation error
- Invalid or missing 'at' timestamp format causes a parse error
- Unrecognized 'unit' value outside the enum returns a bad request
- Non-finite or non-numeric 'amount' causes a validation failure
- Payment not provided or insufficient USDC triggers a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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