Suggest an editImprove this articleRefine the answer for “How do microservices interact with each other?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)Microservices interact with each other through **network interfaces**, exchanging data over standard protocols, most often through an **API** or a **messaging system**. **Key point:** microservices communicate through API calls or events, choosing between a synchronous (waiting for a response) and an asynchronous (message-based) approach, depending on the task and the response speed needed.Shown above the full answer for quick recall.Answer (EN)ImageMicroservices interact with each other through **network interfaces**, exchanging data over standard protocols, most often through an **API** or a **messaging system**. --- ### The main ways of interacting 1. **Synchronous interaction (through an API)** One service calls another directly and waits for a response. - Protocols: HTTP/HTTPS, gRPC. - Data formats: JSON, Protobuf. *Example:* the orders service requests user data from the profiles service. 2. **Asynchronous interaction (through a message queue)** Services do not wait for responses; they exchange events. - Tools: RabbitMQ, Kafka, NATS. *Example:* after an order is created, the service "publishes an event", and the delivery service reacts to it. 3. **Event bus** All services subscribe to shared events ("new order", "payment confirmed") and react to them independently. --- ### Why this is needed - It minimizes the dependency between services. - It increases resilience: a failure in one service does not block the rest. - It allows communication to be scaled to fit specific scenarios. --- **Summary:** > Microservices communicate through **API calls or events**, > choosing between a **synchronous** (waiting for a response) and an **asynchronous** (message-based) approach, > depending on the task and the response speed needed.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.