curl --request POST \
  --url https://api.attio.com/v2/lists \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "data": {
    "name": "Enterprise Sales",
    "api_slug": "enterprise_sales",
    "parent_object": "people",
    "workspace_access": "read-and-write",
    "workspace_member_access": [
      {
        "workspace_member_id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b",
        "level": "read-and-write"
      }
    ]
  }
}
'

import requests

url = "https://api.attio.com/v2/lists"

payload = { "data": {
        "name": "Enterprise Sales",
        "api_slug": "enterprise_sales",
        "parent_object": "people",
        "workspace_access": "read-and-write",
        "workspace_member_access": [
            {
                "workspace_member_id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b",
                "level": "read-and-write"
            }
        ]
    } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    data: {
      name: 'Enterprise Sales',
      api_slug: 'enterprise_sales',
      parent_object: 'people',
      workspace_access: 'read-and-write',
      workspace_member_access: [
        {
          workspace_member_id: '50cf242c-7fa3-4cad-87d0-75b1af71c57b',
          level: 'read-and-write'
        }
      ]
    }
  })
};

fetch('https://api.attio.com/v2/lists', 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.attio.com/v2/lists",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'data' => [
        'name' => 'Enterprise Sales',
        'api_slug' => 'enterprise_sales',
        'parent_object' => 'people',
        'workspace_access' => 'read-and-write',
        'workspace_member_access' => [
                [
                                'workspace_member_id' => '50cf242c-7fa3-4cad-87d0-75b1af71c57b',
                                'level' => 'read-and-write'
                ]
        ]
    ]
  ]),
  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.attio.com/v2/lists"

	payload := strings.NewReader("{\n  \"data\": {\n    \"name\": \"Enterprise Sales\",\n    \"api_slug\": \"enterprise_sales\",\n    \"parent_object\": \"people\",\n    \"workspace_access\": \"read-and-write\",\n    \"workspace_member_access\": [\n      {\n        \"workspace_member_id\": \"50cf242c-7fa3-4cad-87d0-75b1af71c57b\",\n        \"level\": \"read-and-write\"\n      }\n    ]\n  }\n}")

	req, _ := http.NewRequest("POST", 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.post("https://api.attio.com/v2/lists")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"data\": {\n    \"name\": \"Enterprise Sales\",\n    \"api_slug\": \"enterprise_sales\",\n    \"parent_object\": \"people\",\n    \"workspace_access\": \"read-and-write\",\n    \"workspace_member_access\": [\n      {\n        \"workspace_member_id\": \"50cf242c-7fa3-4cad-87d0-75b1af71c57b\",\n        \"level\": \"read-and-write\"\n      }\n    ]\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.attio.com/v2/lists")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"data\": {\n    \"name\": \"Enterprise Sales\",\n    \"api_slug\": \"enterprise_sales\",\n    \"parent_object\": \"people\",\n    \"workspace_access\": \"read-and-write\",\n    \"workspace_member_access\": [\n      {\n        \"workspace_member_id\": \"50cf242c-7fa3-4cad-87d0-75b1af71c57b\",\n        \"level\": \"read-and-write\"\n      }\n    ]\n  }\n}"

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

{
  "data": {
    "id": {
      "workspace_id": "14beef7a-99f7-4534-a87e-70b564330a4c",
      "list_id": "33ebdbe9-e529-47c9-b894-0ba25e9c15c0"
    },
    "api_slug": "hiring-engineering",
    "name": "Hiring Engineering",
    "parent_object": [
      "people"
    ],
    "workspace_access": "read-and-write",
    "workspace_member_access": [
      {
        "workspace_member_id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b",
        "level": "read-and-write"
      }
    ],
    "created_by_actor": {
      "type": "workspace-member",
      "id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b"
    },
    "created_at": "2022-11-21T13:22:49.061281000Z"
  }
}

{
  "status_code": 400,
  "type": "invalid_request_error",
  "code": "value_not_found",
  "message": "Workspace member with ID \"50cf242c-7fa3-4cad-87d0-75b1af71c57b\" not found."
}

{
  "status_code": 403,
  "type": "auth_error",
  "code": "billing_error",
  "message": "You attempted to create a List using permissions features that are not currently supported on your plan. Please upgrade, contact sales, or try a different access configuration for your list."
}

{
  "status_code": 404,
  "type": "invalid_request_error",
  "code": "not_found",
  "message": "Parent object with slug/ID \"people\" not found."
}

{
  "status_code": 409,
  "type": "invalid_request_error",
  "code": "slug_conflict",
  "message": "A list with api_slug \"my_list\" already exists."
}