Spring Cloud Contract
If you're implementing Java services using the Spring framework, you may want to consider Spring Cloud Contract for consumer-driven contract testing. The current ecosystem of this tool supports verification of the client calls and the server implementation against the contract. In comparison to Pact, an open source consumer-driven contract testing tool set, it lacks the brokering of the contracts and the support for other programming languages. However, it integrates well with the Spring ecosystem, for instance message routing with Spring Integration.