NEON's Loyalty API is your main API for most integrations, websites and Apps.
It lets you read and save Member and transactional data for PUBLISHED and INSTALLED Entities. By default, only PUBLISHED Entities are accessible, but you can override this by passing in the query parameter includeUnpublished=true to access any INSTALLED Entity.
Almost all endpoints require you to know either the Entity Lookup Id or the Member Lookup Id.