Between 12:32 and 15:26 UTC December 5th, all Verify transaction flows that included SMS were interrupted. The outbound SMS steps of the Verify flow were not initiated due to an internal failure. The subsequent text-to-speech voice calls for any Verify request were successfully generated however.
At 12:32 UTC on the 5th of December, a new deployment was made for the Verify API product. This new patch modified the length of an internal HTTP request which then caused all related internal SMS API calls to fail.
A program of work has been identified that includes: