Fees

Purrbook’s fee

Purrbook charges a 0.30% builder fee, and it only applies when you sell or cash outthrough the interface. Opening a bet through Purrbook costs no Purrbook fee, and positions held to settlement pay no Purrbook fee either.

Protocol fees

Hyperliquid’s own protocol fees for outcome markets are currently set to zero by Hyperliquid. That’s the protocol’s setting and could change on their side.

Deposits and withdrawals

Purrbook adds no deposit or withdrawal fees. Network/bridge costs to get USDC onto Hyperliquid depend on the route you use.