const form = new FormData();
form.append('file', '<string>');

const options = {method: 'POST', headers: {'x-dolfin-api-key': '<api-key>'}};

options.body = form;

fetch('https://api.dolfinai.co/v1/companies/{companyId}/bills', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.dolfinai.co/v1/companies/{companyId}/bills"

files = { "file": ("example-file", open("example-file", "rb")) }
headers = {"x-dolfin-api-key": "<api-key>"}

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

print(response.text)

using RestSharp;


var options = new RestClientOptions("https://api.dolfinai.co/v1/companies/{companyId}/bills");
var client = new RestClient(options);
var request = new RestRequest("");
request.AlwaysMultipartFormData = true;
request.AddHeader("x-dolfin-api-key", "<api-key>");
request.FormBoundary = "---011000010111000001101001";
request.AddFile("file", "example-file");
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

curl --request POST \
  --url https://api.dolfinai.co/v1/companies/{companyId}/bills \
  --header 'Content-Type: multipart/form-data' \
  --header 'x-dolfin-api-key: <api-key>' \
  --form file='@example-file'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}

{
  "type": "<string>",
  "title": "<string>",
  "status": 123,
  "detail": "<string>",
  "instance": "<string>"
}

{
  "type": "<string>",
  "title": "<string>",
  "status": 123,
  "detail": "<string>",
  "instance": "<string>"
}

{
  "type": "<string>",
  "title": "<string>",
  "status": 123,
  "detail": "<string>",
  "instance": "<string>"
}