Rivemont places the orders for your bots on your own Hyperliquid account.

API wallet: a key on your Hyperliquid account for trading only. It places and cancels your bots' orders and cannot withdraw.

Builder fee: the fee Hyperliquid lets an app add to the orders it sends. Your wallet approves the most it may be.

You approve a maximum of 0.1%; you pay from 0.05% per fill (lower with your 30-day volume). Hyperliquid's own fees are separate.

Settings > Stop everything, or remove the API wallet on Hyperliquid's API page.