Last updated 22 June 2026
Can I use my broker API key in more than one app?
In short
It depends on your broker. If your broker gives only one API key and allows logins from more than one place at the same time, you can use the same key in more than one app. If it does not, a new login will log out the earlier one, so two apps keep logging each other out. Some brokers let you create more than one API key (or API app) — then you can use a separate key for each app, which avoids the problem.
Short answer
It depends on your stock broker. There are two cases.
If your broker gives you only one API key
- Some brokers allow the same API key to be logged in from more than one place (different PCs or IPs) at the same time. If yours does, you can use the key in more than one app.
- If your broker does not allow this, then a new login will log out the existing session. So two apps will keep logging each other out.
- Please check with your broker whether they allow multiple logins (from different IPs) on the same API key.
If your broker lets you create more than one API key
- Some brokers let you create more than one API key, or more than one API app.
- This is the best case. Create a separate API key for each app and use them independently. There is no session conflict.