Returns HTML for an iframe that allows a user to redirect to the chosen alternative payment method's web page in a new window.
The alternative payment method must be chosen upon retrieval of a One-time-use token.
Only use this endpoint when you are not using one of the standard integration methods. For more information about those standard methods, see the Supported integration methods for APMs topic.
This iframe emits events, alerting you when the transaction has been submitted, processed, and so forth.
To use the Try It feature for this endpoint, you must first request an APM one-time-use token.