If you own different businesses and will like to add Paystack to multiple websites or apps, the best way to achieve this will be to add a new business to your existing Paystack account.
To add a business to your Paystack account, go to the top left corner of your Paystack Dashboard, and click the dropdown arrow beside your business name.
You will see an option to 'Add a Business'.
Here's a quick illustration -
When adding the new business, you will be required to provide information about the business, including registration documents (if it is a registered business).
In this case, you can use the same registration documents to create each of these new businesses.
Having multiple Paystack businesses under one account allows you to have separated transaction information and granular settings over each of your different businesses on each website, while still maintaining a single dashboard.
If you will like to have everything under one business, you can use your main Paystack business with the same API keys to receive payments on your different businesses/websites. However, please note that all payments will be made to one bank account.
If you absolutely want the payments to be routed to different bank accounts while using one Paystack business, you can use our Split Payments feature. You can see more about this at How to split a payment across multiple bank accounts.