How to Create a gRPC Client in Go

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2026-04-17T12:05:42+00:00
Create a gRPC client in Go by generating code from a .proto file using protoc and calling the generated client methods.

Create a gRPC client in Go by defining the service interface, generating client code with protoc, and using the generated client to make requests.

  1. Install the protocol buffer compiler and Go plugins: go install google.golang.org/protobuf/cmd/protoc-gen-go@latest && go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest.
  2. Run the compiler to generate Go code from your .proto file: protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative your_service.proto.
  3. Create a client connection and call the service method in your Go code:
conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure())
if err != nil {
    log.Fatalf("did not connect: %v", err)
}
defer conn.Close()
c := pb.NewYourServiceClient(conn)
resp, err := c.YourMethod(ctx, &pb.YourRequest{})