Is It Safe to Connect Your Brokerage Account to a Third-Party App?

By Sam Davila on 2026-07-10 - 2 min read

Short answer: it can be, but the connection method is everything. There are two fundamentally different ways apps connect to brokerage accounts, and they belong to different risk classes.

OAuth 2.0: the safe pattern

With OAuth, you never give the app your broker password. Clicking "Connect" sends you to your broker's own login page; you sign in there, the broker asks whether to allow the app to view your account, and the app receives a limited-permission token. The key properties:

  • The app never sees or stores your password.
  • The token is scoped: an app with read-only scope cannot place trades or withdraw funds.
  • You can revoke access any time from your broker's security settings, without changing your password.

This is the same mechanism you use when you "Sign in with Google" on another site, and it is the standard major brokers expose for third-party apps.

Credential sharing: the risky pattern

Some apps ask you to type your brokerage username and password directly into their interface. That means a third party now stores credentials that control your money, you cannot limit what they can do, and revoking access means changing your password. Many brokers' terms of service prohibit it. If an app asks for your actual broker password, that is a red flag regardless of how polished it looks.

A checklist before connecting

  • Does the connection happen on your broker's own domain? Check the address bar.
  • Can funds be withdrawn through the connection? Trading APIs typically cannot move money to third parties, but confirm.
  • Does the app state how data is encrypted and whether it is independently audited (for example SOC 2)?
  • Can you disconnect from the broker's side?

Sentient Logic connects to all supported brokers exclusively through OAuth 2.0, never stores broker passwords, encrypts data with 256-bit AES, and is SOC 2 Type II compliant. That is the bar you should hold any trading app to, including ours.

Educational content, not financial advice.