> ## Documentation Index
> Fetch the complete documentation index at: https://docs.argyle.com/llms.txt
> Use this file to discover all available pages before exploring further.

# API enhancements

> API timestamp format will be standardized January 5, 2026.

<div className="release-meta">
  <span className="release-date">December 4, 2025</span>
  <span className="release-tag" data-changelog-tag="api">API</span>
</div>

<img src="https://mintcdn.com/argyle/spW0uZwUC4bDyMgL/images/changelog-generic/api.png?fit=max&auto=format&n=spW0uZwUC4bDyMgL&q=85&s=1537fc09ccdfb211eeafbc1178e91f0b" alt="API update illustration" width="1030" height="290" data-path="images/changelog-generic/api.png" />

On **January 5, 2026**, timestamps returned across all Argyle endpoints and webhooks will be standardized to a single, uniform format, with any fields that currently use microsecond precision updated to **millisecond precision**:

* [ISO-8601](https://en.wikipedia.org/wiki/ISO_8601) with millisecond precision (3-digit fractional seconds)
* Example: `YYYY-MM-DDTHH:MM:SS.mmmZ`

This update requires no action for most integrations, but if you are validating timestamps with strict schemas or fixed-length parsing, please make any necessary adjustments before January 5.

*For assistance, contact your Argyle customer success manager.*