Formstack Sign API Authentication Issues

Incident Report for Intellistack

Resolved

All known issues with the Sign API and our authentication migration are now resolved and complete.
Posted Sep 30, 2026 - 18:28 EDT

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Sep 29, 2026 - 15:24 EDT

Identified

The issue has been identified and a fix is being implemented.
Posted Sep 29, 2026 - 11:58 EDT

Investigating

We are investigating reports that some Formstack Sign customers are unable to send documents through the API. Affected requests may return a “Request requires authentication” error despite successfully generating an access token. Some customers may also see a null API secret within their account.

Our team is actively investigating and will provide additional updates as more information becomes available.
Posted Sep 29, 2026 - 10:49 EDT
This incident affected: Formstack Sign (API, Documents).
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