res = client.transformations.jobs.list_metrics(id=1)

Iterator<List<Transformation.Job.Metric>> it =   
          client.transformations().jobs().metrics().list(10); 

curl --request GET \
  --url https://{cluster}.cognitedata.com/api/v1/projects/{project}/transformations/jobs/{id}/metrics \
  --header 'Authorization: Bearer <token>'

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://{cluster}.cognitedata.com/api/v1/projects/{project}/transformations/jobs/{id}/metrics', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://{cluster}.cognitedata.com/api/v1/projects/{project}/transformations/jobs/{id}/metrics",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://{cluster}.cognitedata.com/api/v1/projects/{project}/transformations/jobs/{id}/metrics"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://{cluster}.cognitedata.com/api/v1/projects/{project}/transformations/jobs/{id}/metrics")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body

{
  "items": [
    {
      "timestamp": 123,
      "name": "assets.read",
      "count": 123
    }
  ]
}

{
  "error": {
    "code": 123,
    "message": "<string>",
    "missing": [
      {
        "externalId": "my.known.id"
      }
    ],
    "duplicated": [
      {
        "externalId": "my.known.id"
      }
    ]
  }
}

{
  "error": {
    "code": 123,
    "message": "<string>",
    "missing": [
      {
        "externalId": "my.known.id"
      }
    ],
    "duplicated": [
      {
        "externalId": "my.known.id"
      }
    ]
  }
}