Hiro incident

Testnet Stacks Signer Outage

Critical Resolved View vendor source →

Hiro experienced a critical incident on June 3, 2026 affecting Stacks Blockchain API, lasting 2h 30m. The incident has been resolved; the full update timeline is below.

Started
Jun 03, 2026, 10:29 AM UTC
Resolved
Jun 03, 2026, 01:00 PM UTC
Duration
2h 30m
Detected by Pingoru
Jun 03, 2026, 10:29 AM UTC

Affected components

Stacks Blockchain API

Update timeline

  1. investigating Jun 03, 2026, 10:29 AM UTC

    We are investigating an issue with the Testnet Stacks Blockchain Signer that began at Jun 3, 2026, 6:28 AM ET. We will share more details as additional information becomes available.

  2. monitoring Jun 03, 2026, 11:22 AM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Jun 03, 2026, 01:00 PM UTC

    This incident has been resolved.