Hiro experienced a major incident on December 11, 2025 affecting Stacks Blockchain API and explorer.hiro.so, lasting 4h 23m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Dec 11, 2025, 04:01 PM UTC
We are investigating an issue with the Mainnet API service that began at Dec 11, 2025, 10:57 AM 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.
- monitoring Dec 11, 2025, 04:19 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Dec 11, 2025, 08:24 PM UTC
Upon review, we found some network instability within our infrastructure that was causing the Stacks Blockchain API to delay block ingestion. We believe to have found and resolved the underlying cause.