...
Access tokens are valid for one hour so make sure to implement a refreshing flow or retrieve a new access token every hour. Make sure to use the access tokens for the full hour and don’t request new tokens for every API call made.
As AWS region all payments instances are located in Frankfurt (eu-central-1).
Using libraries
Several languages provide libraries to make API Calls against AWS without doing a raw request. Feel free to use any of these libraries to accelerate your development process. For more information about using this API in one of the language-specific AWS SDKs, see the following:
...