Prediction market Predict.fun says about 400,000 USDT left user wallets after a possible third-party docs-site compromise, and promises full refunds

Predict.fun, a prediction market on BNB Chain, said on Tuesday that "a small number of users" had seen unauthorized transfers out of their wallets totaling about 400,000 USDT, according to crypto.news and TokenPost.

The company's preliminary investigation points to a possible compromise of an API documentation site hosted by a third-party provider, crypto.news reported. It has taken that site offline while the work continues and gave no date for restoring it. The reports did not explain how an attacker used a documentation site to reach user funds, and Predict.fun has not said who was behind it.

Predict.fun said it will reimburse affected users in full for funds lost as a direct result of the incident, and will publish a full post-mortem when the investigation finishes. crypto.news noted the platform launched in December 2025, added a self-service developer dashboard for generating API keys on September 1, and is offered inside Binance Wallet.

Predict.fun had not said how many users were affected beyond "a small number", or whether any of the stolen funds have been traced.