Considering a scenario where you need to test APIs with a requirement for high scalability and flexibility, which type of API would you focus on?

In scenarios demanding high scalability and flexibility, gRPC is a suitable choice. gRPC is a modern, high-performance RPC (Remote Procedure Call) framework that uses HTTP/2 for transport and Protocol Buffers for serialization. It excels in scenarios where low latency and high throughput are crucial, making it a preferred choice for scalable systems.