The Platform API contains tenant level configuration and settings used throughout Rhythm. This includes Saved Queries, Custom Fields, and Forms.
https://docs.api.rhythmsoftware.com/_mock/apis/platform/platform-v1/
https://platform.api.rhythmsoftware.com/
https://docs.api.rhythmsoftware.com/_mock/apis/platform/platform-v1/emailActivities/{tenantId}/{contactId}
https://platform.api.rhythmsoftware.com/emailActivities/{tenantId}/{contactId}
curl -i -X GET \
'https://docs.api.rhythmsoftware.com/_mock/apis/platform/platform-v1/emailActivities/{tenantId}/{contactId}' \
-H 'Authorization: Bearer <YOUR_JWT_HERE>'{ "activity": [ { … } ] }