PolygonIO experienced a major incident on September 9, 2026 affecting Market Data REST Endpoints and Market Data WebSocket Channels, lasting 14h 3m. The incident has been resolved; the full update timeline is below.
Affected components
Market Data REST EndpointsMarket Data WebSocket Channels
Update timeline
- investigating Sep 09, 2026, 12:26 AM UTC
Beginning around 6:46 PM ET, aggregate bars for roughly two-thirds of US equities are missing from the v2 aggregates endpoint, the v2 stocks snapshot, and the A/AM websocket channels. Trades and the v3 snapshot are unaffected.
- identified Sep 09, 2026, 12:42 AM UTC
The issue has been identified and a fix is being implemented.
- monitoring Sep 09, 2026, 12:58 AM UTC
A fix has been implemented and we are monitoring the results.
- resolved Sep 09, 2026, 02:29 PM UTC
This incident has been resolved.