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The k6/net/grpc module provides a gRPC client for Remote Procedure Calls (RPC) over HTTP/2. It supports unary and streaming (starting on v0.49) RPCs.

ClientgRPC client used for making RPC calls to a gRPC Server.
Client.load(importPaths, …protoFiles)Loads and parses the given protocol buffer definitions to be made available for RPC requests.
Client.connect(address [,params])Connects to a given gRPC service.
Client.invoke(url, request [,params])Makes an unary RPC for the given service/method and returns a Response.
Client.asyncInvoke(url, request [,params])Asynchronously makes an unary RPC for the given service/method and returns a Promise with Response.
Client.close()Close the connection to the gRPC service.
ParamsRPC Request specific options.
ResponseReturned by RPC requests.
ConstantsDefine constants to distinguish between gRPC Response statuses.
Stream(client, url, [,params])Creates a new gRPC stream.
Stream.on(event, handler)Adds a new listener to one of the possible stream events.
Stream.write(message)Writes a message to the stream.
Stream.end()Signals to the server that the client has finished sending.

gRPC metrics

k6 takes specific measurements for gRPC requests. For the complete list, refer to the Metrics reference.


import grpc from 'k6/net/grpc';
import { check, sleep } from 'k6';

const client = new grpc.Client();
client.load(['definitions'], 'hello.proto');

export default () => {
  client.connect('', {
    // plaintext: false

  const data = { greeting: 'Bert' };
  const response = client.invoke('hello.HelloService/SayHello', data);

  check(response, {
    'status is OK': (r) => r && r.status === grpc.StatusOK,