Spring Cloud Gateway is an API gateway built on Spring Framework and Spring Boot that provides dynamic routing and request filtering for microservices architectures.
The tool solves the problem of routing client requests to appropriate backend services in a microservices environment. It uses Spring's reactive programming model to handle routing decisions based on HTTP request attributes such as path, method, header, and host. Requests matching defined routes can be processed through filters that modify headers, parameters, paths, or apply circuit breaker logic before being forwarded downstream. Routes can be configured either through API calls or configuration files, and the gateway can discover available services dynamically using Spring Cloud's DiscoveryClient.
Teams building microservices systems should consider this gateway when they need a lightweight, Spring-native routing layer. It suits projects already invested in the Spring ecosystem, particularly those using Spring Boot and Spring Cloud. The tool integrates naturally with Spring's component model and configuration patterns, making it a natural fit for teams standardizing on Spring technologies.
The project maintains active development with continuous integration workflows and code coverage tracking. The codebase targets modern Java and Spring versions, requiring Java 17 and building on Spring Framework 6 and Spring Boot 3. Build and documentation processes are automated through Maven, with documentation sources managed in asciidoc format and built using Antora.
