The customer/onboarding services provide the following REST API and Kafka messages:
OneStop Platform
our services are communicating with OSP using REST + Webhooks in case of ASYNC (OSP Workflow API integration )
Feature store
customer/onboarding will provide Kafka messages (events about customer data changes, customer data snapshot + probably customer-related documents data changes).
Fraud prevention system (Slacker Risk)
we assume REST communication could be integrated (REST facade or separate REST API call) that can block fraud operations like Customer activation, Customer profile change, etc.