Suggest an editImprove this articleRefine the answer for “What does "loose coupling" mean between services?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**Loose coupling** is a principle in which microservices depend on each other as little as possible and communicate through clear interfaces (APIs) rather than shared code or a database. **Key point:** services are connected logically but isolated technically - each one can be changed, restarted, or replaced without affecting the others.Shown above the full answer for quick recall.Answer (EN)Image**Loose coupling** is a principle in which microservices **depend on each other as little as possible**. Each service can be changed, restarted, or replaced without affecting the others. ### The essence The connection between services is built through **clear interfaces (APIs)**, not through shared code or a database. One service only knows *what the other does*, not *how it is built*. *Example:* The orders service calls the payments API `POST /payments`, but it does not care what the payments service is written in or how it stores data. ### Why this matters - Lets you develop and update services independently. - Increases resilience: a failure in one service does not break the others. - Simplifies scaling and swapping technologies. ### How it is achieved - Communication only through **APIs or message queues**. - **Isolated databases.** - **API contracts and versions** so that changes do not break other services. - Using **asynchronous events** instead of direct calls where possible. **Summary:** > Loose coupling means services talk to each other but do not depend on each other. > They are connected logically but isolated technically, like independent participants in one ecosystem.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.