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Deprecated

v2026-02-01 Deprecation

about 4 hours ago by Gusto Developer Relations

With the release of v2026-06-15—which is stabilized as of today, June 16, 2026—v2026-02-01 has entered the year-long deprecation process effective June 15, 2026.

The deprecation period spans 12 months and consists of two distinct phases:

  • Full Support (June 15, 2026—November 15, 2026), continuing to receive bug fixes, security patches, and new features where applicable
  • Limited Support (November 15, 2026—June 15, 2027) for the following 6 months. The API version will remain functional, but will only receive critical security fixes

After June 15, 2027,v2026-02-01 will be fully retired and unusable. If your API request header specifies a version older than the oldest supported version—any version older than v2025-06-15—your API request will return a 406 Not Acceptable error. If no version is specified in the request header, your API request will default to the Minimum API Version listed in our Developer Portal.

Once you've completed your upgrade, have updated your headers to specify v2026-06-15, and are ready for your Minimum API Version to be updated accordingly, please fill out this form to specify a date and, optionally, time for the update.

For more comprehensive details on all API updates, including new version releases and version deprecation timelines, please visit our Version Upgrade Guide, and API Versioning Guide.