Cookbook: gRPC
```bash
cargo run -p grpc-echo -- 127.0.0.1:8080
# unary POST http://{bound}/demo.Echo/Say (application/grpc)Inline .proto (demo.Echo/Say) over cleartext HTTP/2-capable endpoint.
Source: examples/grpc. Guide: gRPC.
```bash
cargo run -p grpc-echo -- 127.0.0.1:8080
# unary POST http://{bound}/demo.Echo/Say (application/grpc)Inline .proto (demo.Echo/Say) over cleartext HTTP/2-capable endpoint.
Source: examples/grpc. Guide: gRPC.