Go to Poloniex
Log in or create a new account on https://poloniex.com/.
Follow to API
Directly open the API Management page
Hover the mouse over the profile icon on the top right corner of the page and click on the Profile menu, then choose API Keys tab:
If you see the message about disabled API access, click "Enable API":
Confirm with 2FA code and click on the confirmation link sent to your email:
Click "Create New Key"
Confirm again with 2FA and link sent to your email
Add Poloniex to 3Commas
Congratulations! Your API keys are ready:
Don't change the key settings.
Check how to connect API to 3Commas.