Testnet Stacks Blockchain API Outage

Incident Report for Hiro Systems

Resolved

This incident has been resolved.
Posted Dec 22, 2025 - 15:22 EST

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Dec 22, 2025 - 15:05 EST

Investigating

We are investigating degraded performance with the Stacks Blockchain API in Testnet that began at Dec 22, 2025, 2:53 PM ET.
Data retrieved from this API’s endpoints may be several blocks behind. The Stacks Explorer, wallets, and any
services using the API may be impacted. We will share more details as additional information becomes available.
Posted Dec 22, 2025 - 14:53 EST
This incident affected: Services for Testnet (Stacks Blockchain API) and explorer.hiro.so.