curl --request PATCH \
  --url https://mill-api.example.com/api/boards/{boardId}/tasks/bulk \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "tasks": [
    {
      "id": "22222222-2222-4222-8222-222222222222",
      "version": 1
    }
  ],
  "changes": {
    "assigneeId": null
  }
}
'

import requests

url = "https://mill-api.example.com/api/boards/{boardId}/tasks/bulk"

payload = {
    "tasks": [
        {
            "id": "22222222-2222-4222-8222-222222222222",
            "version": 1
        }
    ],
    "changes": { "assigneeId": None }
}
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({
    tasks: [{id: '22222222-2222-4222-8222-222222222222', version: 1}],
    changes: {assigneeId: null}
  })
};

fetch('https://mill-api.example.com/api/boards/{boardId}/tasks/bulk', 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://mill-api.example.com/api/boards/{boardId}/tasks/bulk",
  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([
    'tasks' => [
        [
                'id' => '22222222-2222-4222-8222-222222222222',
                'version' => 1
        ]
    ],
    'changes' => [
        'assigneeId' => null
    ]
  ]),
  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://mill-api.example.com/api/boards/{boardId}/tasks/bulk"

	payload := strings.NewReader("{\n  \"tasks\": [\n    {\n      \"id\": \"22222222-2222-4222-8222-222222222222\",\n      \"version\": 1\n    }\n  ],\n  \"changes\": {\n    \"assigneeId\": null\n  }\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://mill-api.example.com/api/boards/{boardId}/tasks/bulk")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"tasks\": [\n    {\n      \"id\": \"22222222-2222-4222-8222-222222222222\",\n      \"version\": 1\n    }\n  ],\n  \"changes\": {\n    \"assigneeId\": null\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://mill-api.example.com/api/boards/{boardId}/tasks/bulk")

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  \"tasks\": [\n    {\n      \"id\": \"22222222-2222-4222-8222-222222222222\",\n      \"version\": 1\n    }\n  ],\n  \"changes\": {\n    \"assigneeId\": null\n  }\n}"

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

{
  "items": [
    {
      "id": "22222222-2222-4222-8222-222222222222",
      "boardId": "11111111-1111-4111-8111-111111111111",
      "identifier": "ENG-1",
      "title": "Verify database restore",
      "description": "Restore a recent backup into an isolated database.",
      "acceptanceCriteria": "- Confirm task and comment counts match\n- Record the result",
      "type": "task",
      "status": "todo",
      "priority": "high",
      "assigneeId": null,
      "startDate": "2027-01-18",
      "dueDate": "2027-01-20",
      "version": 2,
      "statusChangedAt": "2027-01-18T09:30:00.000Z",
      "createdAt": "2027-01-18T09:30:00.000Z",
      "updatedAt": "2027-01-18T09:30:00.000Z",
      "createdBy": "66666666-6666-4666-8666-666666666666"
    }
  ]
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "requestId": "<string>"
  }
}