What should an API timestamp contract include?
Define accepted unit (seconds or milliseconds), timezone standard (UTC), max accepted clock skew, and how invalid values are rejected.
EpochConverter API Timestamp Reference (2026)
If you searched for epochconverter api timestamp, this page gives a strict reference you can hand to engineering teams in 2026. API timestamp bugs usually happen at service boundaries where one system sends milliseconds and another expects seconds. Define one accepted unit per endpoint and reject anything else early.
For auth signatures and expiring links, generate timestamps at request time on the server, then validate skew against a small window. Keep everything in UTC and only format local time for UI output. This keeps cache and security logic consistent across regions.
2026 API timestamp validation checklist
- Document accepted timestamp unit for every endpoint.
- Normalize incoming values to one internal unit before comparisons.
- Apply UTC-only comparisons for signatures, TTLs, and replay guards.
- Return explicit 4xx errors for malformed or out-of-window timestamps.
Related EpochConverter pages
Start with epochconverter API timestamp guide, then review request examples. For signing workflows, use request signing patterns.
Need live conversion while debugging payloads? Open the main epoch converter tool.
Related developer tool
Running timestamp checks on a cron job? Validate cadence with Cron Expression Builder.
Frequently Asked Questions
How can I validate seconds vs milliseconds quickly?
Use digit length at the boundary: 10 digits usually indicates seconds and 13 digits usually indicates milliseconds, then normalize to one unit internally.
Should APIs generate timestamps on client or server?
For trust-sensitive flows like signatures and expirations, generate and verify timestamps on the server to reduce drift and tampering risk.
How do I debug timestamp failures in 2026 systems?
Log raw value, parsed unit, and UTC conversion for each request path. Most failures come from mixed units or local-time assumptions.