Private banking

Connect your banking layer.

Link a sandbox checking account to view available cash, fund approved trades, and receive future market settlements. Banking remains separate from market-access enforcement.

Funding methods

Add money.

Choose how you would like to fund your connected sandbox checking account.

Digital wallet

Apple Pay

Not linked

Use Apple Pay as a funding method for your sandbox banking account.

Funding amount

Payment card

Credit or debit card

Not linked

Add a card for future sandbox account funding.

Connected funding methods 0 methods

No additional funding methods connected.

Security

This prototype stores only masked card information. Full card numbers and security codes are never saved to localStorage.

Capital One Nessie

Checking account

This sandbox account acts as the financial source for available balance, approved trade funding, and settlement payouts.

Not connected

Create a sandbox account

This creates a real sandbox checking account through the Nessie API - balance and ledger come straight from Capital One's sandbox.

Account type The account used to fund market activity.

Starting sandbox balance Starting balance for the sandbox account.

Banking flow

What happens here?

The banking layer supplies financial state. It does not decide whether a user is permitted to trade.

Connect

Create or retrieve the linked sandbox account.

Read balance

Profile and checkout display one shared balance.

Clear trade

Identity and market rules are checked before funds move.

Transfer

Approved trades debit the linked balance.

Settle

Winning positions eventually credit payouts back.

Security

Banking stays isolated.

When the real Nessie connection is added, API credentials should remain on the server. The browser should only receive the account information it needs to display.

Banking activity

Account ledger

0 transactions

Connect an account to begin recording banking activity.