curl --request POST \
  --url https://api.messaging.phonovation.com/knowledge-base/1/attachments \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: multipart/form-data' \
  --form file=@example-file

import requests

url = "https://api.messaging.phonovation.com/knowledge-base/1/attachments"

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

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

print(response.text)

using RestSharp;


var options = new RestClientOptions("https://api.messaging.phonovation.com/knowledge-base/1/attachments");
var client = new RestClient(options);
var request = new RestRequest("");
request.AlwaysMultipartFormData = true;
request.AddHeader("Authorization", "<api-key>");
request.FormBoundary = "---011000010111000001101001";
request.AddFile("file", "example-file");
var response = await client.PostAsync(request);

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

HttpResponse<String> response = Unirest.post("https://api.messaging.phonovation.com/knowledge-base/1/attachments")
  .header("Authorization", "<api-key>")
  .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--")
  .asString();

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.messaging.phonovation.com/knowledge-base/1/attachments",
  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--",
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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;
}

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

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

options.body = form;

fetch('https://api.messaging.phonovation.com/knowledge-base/1/attachments', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "name": "product-overview.pdf",
  "downloadPublicUrl": "https://cdn.example.com/attachments/product-overview.pdf",
  "contentType": "application/pdf",
  "sizeInBytes": 1048576,
  "scope": "INTERNAL",
  "publicContentUrl": "https://public.example.com/attachments/product-overview.pdf"
}

{
  "errorCode": "E400",
  "description": "Request cannot be processed.",
  "action": "Check the syntax, violations and adjust the request.",
  "violations": [],
  "resources": []
}

{
  "errorCode": "E401",
  "description": "The request lacks valid authentication credentials for the requested resource.",
  "action": "Check the resources and adjust authentication credentials.",
  "violations": [],
  "resources": [
    {
      "name": "API Authentication",
      "url": "https://www.phonovation.com/docs/essentials/api-authentication"
    }
  ]
}

{
  "errorCode": "E403",
  "description": "Insufficient permissions to access the requested resource.",
  "action": "Repeat the request with new or different credentials.",
  "violations": [],
  "resources": [
    {
      "name": "API Scopes",
      "url": "https://www.phonovation.com/docs/essentials/api-essentials/api-authorization#api-scopes"
    }
  ]
}

{
  "errorCode": "E429",
  "description": "Too many requests sent.",
  "action": "Check request rate limit specified in the API endpoint documentation resource.",
  "violations": [],
  "resources": [
    {
      "name": "Throttling handling errors",
      "url": "https://www.phonovation.com/docs/essentials/integration-best-practices#throttling-handling-errors"
    }
  ]
}

{
  "errorCode": "E500",
  "description": "Something went wrong.",
  "action": "Contact the support.",
  "violations": [],
  "resources": []
}