curl --request POST \
  --url https://api.qa.sima.ag/api/v3/third_party/establishments/{new_establishment}/contour/import \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-SIMA-SYSTEM-ID: <api-key>' \
  --form files=@example-file \
  --form 'existing_names=[]'

import requests

url = "https://api.qa.sima.ag/api/v3/third_party/establishments/{new_establishment}/contour/import"

files = { "files": ("example-file", open("example-file", "rb")) }
payload = { "existing_names": "[]" }
headers = {
    "Authorization": "Bearer <token>",
    "X-SIMA-SYSTEM-ID": "<api-key>"
}

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

print(response.text)

const form = new FormData();
form.append('files', '<string>');
form.append('existing_names', '[]');

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'X-SIMA-SYSTEM-ID': '<api-key>'}
};

options.body = form;

fetch('https://api.qa.sima.ag/api/v3/third_party/establishments/{new_establishment}/contour/import', 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.qa.sima.ag/api/v3/third_party/establishments/{new_establishment}/contour/import",
  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=\"files\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"existing_names\"\r\n\r\n[]\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: multipart/form-data",
    "X-SIMA-SYSTEM-ID: <api-key>"
  ],
]);

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

curl_close($curl);

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

{
  "fractions": [
    {
      "key": "postman-1",
      "id": null,
      "name": "Fracción 1",
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              -64,
              -31
            ],
            [
              -63.99,
              -31
            ],
            [
              -63.99,
              -30.99
            ],
            [
              -64,
              -30.99
            ],
            [
              -64,
              -31
            ]
          ]
        ]
      },
      "area_ha": 12.45,
      "holes_count": 0,
      "invalid": false,
      "invalid_reason": null
    }
  ],
  "imported_count": 1,
  "imported_area_ha": 12.45,
  "unreadable_files": [],
  "invalid_keys": []
}