What you are approving
You approve a builder fee of 0.030% to Agonaut’s builder address on Hyperliquid. This is a Hyperliquid native feature: a builder fee is a small, capped fee that an app can collect on the volume it routes, and you approve the maximum rate up front.1
Open the trade page
The activation prompt appears the first time you trade, or on your account
page.
2
Sign the approval
Your wallet signs an approveBuilderFee message setting the cap at 0.030%.
This is a signature, not a transfer.
3
Trading is live
You can now place orders, and your volume counts toward points and the
leaderboard.
The fee is a cap, not a charge on signing. You are charged the 0.030% only on
actual trades, taken by Hyperliquid at fill time. Approving costs nothing.