Did I understand correctly that you always received the event stream via Kafka, or were there some gRPC/HTTP endpoints?

Event streams in systems are often received through Kafka, as it is a reliable message broker for asynchronous data transfer. However, depending on the architecture, gRPC or HTTP hooks may also be used to receive events or data.

For example, if synchronous processing or querying specific information is needed, gRPC or REST API are often used. While Kafka is suitable for processing large streams of events with high throughput and delivery guarantees.

Thus, the choice depends on the system requirements: Kafka for event streams, gRPC/HTTP for requests and commands.