PolygonIO incident

Custom Bars API returning 504 errors on minute and hourly requests for today's date (2026-05-21) for select stock tickers

Major Resolved View vendor source →

PolygonIO experienced a major incident on May 21, 2026 affecting Market Data REST Endpoints, lasting 3h 5m. The incident has been resolved; the full update timeline is below.

Started
May 21, 2026, 03:53 PM UTC
Resolved
May 21, 2026, 06:58 PM UTC
Duration
3h 5m
Detected by Pingoru
May 21, 2026, 03:53 PM UTC

Affected components

Market Data REST Endpoints

Update timeline

  1. investigating May 21, 2026, 03:53 PM UTC

    We are currently investigating this issue.

  2. investigating May 21, 2026, 03:54 PM UTC

    We are continuing to investigate this issue.

  3. investigating May 21, 2026, 03:55 PM UTC

    We are continuing to investigate this issue.

  4. monitoring May 21, 2026, 04:03 PM UTC

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

  5. resolved May 21, 2026, 06:58 PM UTC

    This incident has been resolved.