curl --request POST \
  --url https://api.attio.com/v2/files/upload \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form file='@example-file' \
  --form object=people \
  --form record_id=bf071e1f-6035-429d-b874-d83ea64ea13b \
  --form parent_folder_id=a1b2c3d4-e5f6-7890-abcd-ef1234567890

import requests

url = "https://api.attio.com/v2/files/upload"

files = { "file": ("example-file", open("example-file", "rb")) }
payload = {
    "object": "people",
    "record_id": "bf071e1f-6035-429d-b874-d83ea64ea13b",
    "parent_folder_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
}
headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, data=payload, files=files, headers=headers)

print(response.text)

const form = new FormData();
form.append('file', '<string>');
form.append('object', 'people');
form.append('record_id', 'bf071e1f-6035-429d-b874-d83ea64ea13b');
form.append('parent_folder_id', 'a1b2c3d4-e5f6-7890-abcd-ef1234567890');

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

options.body = form;

fetch('https://api.attio.com/v2/files/upload', 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/files/upload",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"object\"\r\n\r\npeople\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"record_id\"\r\n\r\nbf071e1f-6035-429d-b874-d83ea64ea13b\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"parent_folder_id\"\r\n\r\na1b2c3d4-e5f6-7890-abcd-ef1234567890\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: multipart/form-data"
  ],
]);

$response = curl_exec($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/files/upload"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"object\"\r\n\r\npeople\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"record_id\"\r\n\r\nbf071e1f-6035-429d-b874-d83ea64ea13b\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"parent_folder_id\"\r\n\r\na1b2c3d4-e5f6-7890-abcd-ef1234567890\r\n-----011000010111000001101001--")

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

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

	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/files/upload")
  .header("Authorization", "Bearer <token>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"object\"\r\n\r\npeople\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"record_id\"\r\n\r\nbf071e1f-6035-429d-b874-d83ea64ea13b\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"parent_folder_id\"\r\n\r\na1b2c3d4-e5f6-7890-abcd-ef1234567890\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

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

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"object\"\r\n\r\npeople\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"record_id\"\r\n\r\nbf071e1f-6035-429d-b874-d83ea64ea13b\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"parent_folder_id\"\r\n\r\na1b2c3d4-e5f6-7890-abcd-ef1234567890\r\n-----011000010111000001101001--"

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

{
  "data": {
    "id": {
      "workspace_id": "14beef7a-99f7-4534-a87e-70b564330a4c",
      "file_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
    },
    "object_id": "97052eb9-e65e-443f-a297-f2d9a4a7f795",
    "object_slug": "people",
    "record_id": "bf071e1f-6035-429d-b874-d83ea64ea13b",
    "storage_provider": "attio",
    "created_by_actor": {
      "type": "workspace-member",
      "id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b"
    },
    "created_at": "2023-01-01T15:00:00.000000000Z",
    "file_type": "file",
    "name": "document.pdf",
    "content_type": "application/pdf",
    "content_size": 1024,
    "parent_folder_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  }
}