Polymarket halted trading on its international platform Thursday after a third-party provider was compromised, leaving customers unable to trade while the company worked to restore service. T
Polymarket halted trading on its international platform Thursday after a third-party provider was compromised, leaving customers unable to trade while the company worked to restore service.
The company said it had identified and fixed the underlying issue, but its official status page still listed a major outage affecting the Predictions Trading API, also called the CLOB, at 2:48 p.m. Eastern.
"Anyone who has been impacted will be made whole," Polymarket said in a 2:37 p.m. update. It said the incident had been referred to relevant law enforcement.
The company did not identify the provider, disclose an affected-user count or confirm a dollar amount lost. At 2:55 p.m. Eastern, it said trading would resume at approximately 3 p.m.; its status page had not confirmed a restart at 3:04 p.m.
Watch below: An archival February 2025 interview on how Polymarket works, not footage of Thursday's incident.
‘People are putting money behind the outcome’ — Polygon CEO on Polymarket (4:35)The disruption affects traders using Polymarket.com. The notice does not establish an outage at the separate U.S. exchange. Polymarket's other displayed components, including account access and market data, were marked operational.
At 2:05 p.m. Eastern, the platform initially announced cancel-only trading and paused relayer actions. Cancel-only mode normally allows existing orders to be canceled but blocks new ones, according to its documentation. The later update said trading remained temporarily halted.
Customers can follow the official status page at status.polymarket.com for incident updates and a confirmed restart notice. A statement that the underlying issue is fixed does not mean trading has resumed.
An X account, @CarOnPolymarket, alleged at 1:45 p.m. that $800,000 had been drained and a friend had lost $600,000. Those amounts have not been independently verified and are not a company-confirmed loss total.
The interruption came as Polymarket displayed markets on U.S. congressional control and the Federal Reserve's December decision. Its House-control market showed $29 million in cumulative volume, versus $11 million for Senate control and $8 million for the Fed decision. These are total market volumes, not Thursday's turnover.
