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Explore topics about payment API requests, responses and event notifications, freely readable without an account.

API request/response fundamentals

This explainer places api request/response fundamentals within payment API requests, responses and event notifications. Start by separating the participants, the information a reader sees and the event that requires independent evidence. Providers can use similar words differently, so their own definitions still matter.

Authentication and access concepts

This explainer places authentication and access concepts within payment API requests, responses and event notifications. Start by separating the participants, the information a reader sees and the event that requires independent evidence. Providers can use similar words differently, so their own definitions still matter.

Callbacks and webhook semantics

This explainer places callbacks and webhook semantics within payment API requests, responses and event notifications. Start by separating the participants, the information a reader sees and the event that requires independent evidence. Providers can use similar words differently, so their own definitions still matter.

Idempotency and error handling

This explainer places idempotency and error handling within payment API requests, responses and event notifications. Start by separating the participants, the information a reader sees and the event that requires independent evidence. Providers can use similar words differently, so their own definitions still matter.