Reading library
Illustrative scenarios
Explore illustrative scenarios about payment API requests, responses and event notifications, freely readable without an account.
A payment initiation request as a teaching diagram
This is a constructed case about payment API requests, responses and event notifications; it contains no real transaction, person, merchant or balance. Its value is in separating what an example shows from conclusions that require a provider's records or an official source.
02An event notification that arrives twice
This is a constructed case about payment API requests, responses and event notifications; it contains no real transaction, person, merchant or balance. Its value is in separating what an example shows from conclusions that require a provider's records or an official source.
03A service response error with safe retry guidance
This is a constructed case about payment API requests, responses and event notifications; it contains no real transaction, person, merchant or balance. Its value is in separating what an example shows from conclusions that require a provider's records or an official source.