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Once BIT has created the keys, check each OKX setting below before the strategy starts, even if BIT carried some over from your main account.
1
In Blockhouse, on the OKX tab of the Credentials step, choose Copy → Comma on the Read-only API IPs, and again later on the Trading API IPs.In the BIT Prime Brokerage portal, open Accounts → Open Account. On the CEFI tab, choose Application next to OKX, then set:
  • Custody: OKX with no external Custody
  • Account’s Api: Authorize BIT to create your API
Choose Add twice, once for each key, and fill them in:Account Notice is where BIT sends the new key, and Binding IP address takes up to 10 addresses, comma-separated. Choose Confirm and complete the verification.
The other custody options, such as Copper or Oasis, are only needed if you’re taking out a loan through BIT. If you are, ask BIT which one to choose, and make sure every sub-account you apply for is in the same risk control unit (RCU): confirm both with your BIT contact.
2

Enter the keys in Blockhouse

BIT usually creates the keys within a day. When it sends them to your authorized email, copy each key’s API key, secret and passphrase into the matching fields on the OKX tab in Blockhouse, and tick IPs are whitelisted for read-only API and IPs are whitelisted for trading API.
3

Switch to Multi-currency margin

Log in to the sub-account on okx.com and open a perpetual’s trading page, such as BTCUSDT. Open Settings, the hexagon icon in the bar on the right. Account mode should read Multi-currency margin mode.If it doesn’t, open Account mode, scroll to Advanced mode, choose Multi-currency and Switch. When OKX asks you to Set margin collateral, choose All crypto and Confirm. Complete the knowledge test if OKX asks for one.
4

Turn on Auto-borrow

In the same Settings panel, under Preferences, turn Auto-borrow on.
5

Set one-way mode

In the same panel, Position mode should read One-way mode. If it doesn’t, open it, choose One-way mode and OK.
6

Finish in Blockhouse

In the BIT Prime Brokerage portal, open Accounts → My Accounts. In the Sub-account List, copy the Account Number for OKX, for example 1234567__000001. In Blockhouse, on the OKX tab, enter it in BIT account number for OKX.Check that every key field on the tab is filled in and both IP boxes are ticked. Set up any other exchange from the BIT guide, then submit the Credentials step.
Checked against OKX’s help centre and API docs on 9 October 2026. OKX renames menus from time to time; if a label differs, use the nearest match.