To use Adyen, you don't have to be incorporated in a particular region. No matter where you are based, Adyen allows you to accept payments from around the world.
However, you need to ensure that Adyen supports your business type, Currency and the type of payment method type that you require.
Integration options - Chargebee offers multiple ways to integrate with Adyen. You could use either our hosted pages or our APIs and Adyen can be linked using their checkout pages or by using their checkout JS (JavaScript). Here’s more on that.
Note that Adyen processes payments in an asynchronous manner, which means there will be a delay in response from Adyen about the payment status. Click here for more details on the payment workflow in Adyen.
Related Articles and documentation:
How to integrate Chargebee API with Adyen's Hosted Payment Pages?