Polymarket - CLOB Maintenance – Maintenance details

All systems operational

CLOB Maintenance

Completed
Scheduled for July 21, 2026 at 4:00 AM – 5:00 AMUTC

Affects

Predictions

Under maintenance from 4:00 AM to 5:00 AM

Predictions Trading API (CLOB)

Under maintenance from 4:00 AM to 5:00 AM

Updates
  • Completed
    July 21, 2026 at 5:00 AMUTC
    Completed
    July 21, 2026 at 5:00 AMUTC
    Maintenance has completed successfully.
  • In progress
    July 21, 2026 at 4:10 AMUTC
    In progress
    July 21, 2026 at 4:10 AMUTC
    Maintenance is now in progress.
  • Planned
    July 21, 2026 at 4:00 AMUTC
    Planned
    July 21, 2026 at 4:00 AMUTC

    What to expect:

    • Trading intermittent for up to 35 minutes.

    • Brief post-only window after restart (2 min) before normal matching resumes. Cancels accepted.

    Post-only: only orders explicitly set with postOnly: true are accepted. Regular limit orders without the flag, market orders, and any taking liquidity will be rejected. Cancels for existing orders will still go through.

    See POST /order API reference for the post-only flag.