curl --request PATCH \
  --url https://api.arize.com/v2/evaluators/{evaluator_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Updated Evaluator Name",
  "description": "Updated description"
}
'

import requests

url = "https://api.arize.com/v2/evaluators/{evaluator_id}"

payload = {
    "name": "Updated Evaluator Name",
    "description": "Updated description"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.patch(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({name: 'Updated Evaluator Name', description: 'Updated description'})
};

fetch('https://api.arize.com/v2/evaluators/{evaluator_id}', 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://api.arize.com/v2/evaluators/{evaluator_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'name' => 'Updated Evaluator Name',
    'description' => 'Updated description'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.arize.com/v2/evaluators/{evaluator_id}"

	payload := strings.NewReader("{\n  \"name\": \"Updated Evaluator Name\",\n  \"description\": \"Updated description\"\n}")

	req, _ := http.NewRequest("PATCH", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.patch("https://api.arize.com/v2/evaluators/{evaluator_id}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"Updated Evaluator Name\",\n  \"description\": \"Updated description\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.arize.com/v2/evaluators/{evaluator_id}")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"Updated Evaluator Name\",\n  \"description\": \"Updated description\"\n}"

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

{
  "id": "RXZhbHVhdG9yOjEyOmFCY0Q=",
  "name": "Updated Evaluator Name",
  "description": "Updated description",
  "type": "TEMPLATE",
  "space_id": "U3BhY2U6NDkzOkJaSkc=",
  "created_at": "2026-02-16T22:05:47.900Z",
  "updated_at": "2026-02-17T10:30:00.000Z",
  "created_by_user_id": "VXNlcjoxOm5OYkM="
}

{
  "status": 400,
  "title": "Invalid request parameters",
  "detail": "The 'name' field is required and must be a non-empty string.",
  "instance": "/resource",
  "type": "https://arize.com/docs/ax/rest-reference/errors#invalid-request"
}

{
  "status": 401,
  "title": "Authentication required",
  "detail": "You must be authenticated to access this resource.",
  "instance": "/resource",
  "type": "https://arize.com/docs/ax/rest-reference/errors#authentication-required"
}

{
  "status": 403,
  "title": "Access forbidden",
  "detail": "You do not have permission to access this resource.",
  "instance": "/resource/12345",
  "type": "https://arize.com/docs/ax/rest-reference/errors#access-forbidden"
}

{
  "status": 404,
  "title": "Resource not found",
  "detail": "The requested resource with ID '12345' was not found.",
  "instance": "/resource/12345",
  "type": "https://arize.com/docs/ax/rest-reference/errors#resource-not-found"
}

{
  "status": 409,
  "title": "Resource conflict",
  "detail": "A resource with the given identifier already exists.",
  "instance": "/resource",
  "type": "https://arize.com/docs/ax/rest-reference/errors#resource-conflict"
}

{
  "status": 422,
  "title": "Unprocessable Entity",
  "detail": "One or more fields failed validation.",
  "instance": "/resource/12345",
  "type": "https://arize.com/docs/ax/rest-reference/errors#unprocessable-entity"
}

{
  "status": 429,
  "title": "Rate limit exceeded",
  "detail": "You have exceeded the allowed number of requests. Please try again later.",
  "instance": "/resource",
  "type": "https://arize.com/docs/ax/rest-reference/errors#rate-limit-exceeded"
}