With the popularity of REST, we can sometimes forget that it’s simply one of many options. REST is a very good architectural style for a wide variety of APIs, but there are other API design styles for more nuanced scenarios such as gRPC (Google Remote Procedure Call). gRPC is an open source RPC (Remote Procedure Call) framework created by Google in 2015. It can handle billions of requests per second through the bidirectional streaming over http2. gRPC is particularly suitable for inter-microservice communications, allowing to reduce latency and thus increase performance. During this conference, we will see how we can implement this framework in our PHP microservices, with real use cases and live demo !