curl -X POST "https://api-integration.ollang.com/integration/folder/60b8d6f1e1b9b1d8c6c0d8e1/docs/upload" \
  -H "X-Api-Key: <your-api-key>" \
  -H "Content-Type: multipart/form-data" \
  -F "file=@/path/to/brand-guideline-v3.pdf" \
  -F "type=guideline" \
  -F "name=Brand guideline v3" \
  -F "language=en"

const folderId = "60b8d6f1e1b9b1d8c6c0d8e1";

const formData = new FormData();
formData.append("file", guidelineFile);
formData.append("type", "guideline");
formData.append("name", "Brand guideline v3");
formData.append("language", "en");

const response = await fetch(
  `https://api-integration.ollang.com/integration/folder/${folderId}/docs/upload`,
  {
    method: "POST",
    headers: {
      "X-Api-Key": "<your-api-key>",
    },
    body: formData,
  },
);

const doc = await response.json();
console.log("Attached document:", doc.id);

import requests

folder_id = "60b8d6f1e1b9b1d8c6c0d8e1"

files = {'file': open('brand-guideline-v3.pdf', 'rb')}
data = {
    'type': 'guideline',
    'name': 'Brand guideline v3',
    'language': 'en',
}
headers = {'X-Api-Key': '<your-api-key>'}

response = requests.post(
    f'https://api-integration.ollang.com/integration/folder/{folder_id}/docs/upload',
    files=files,
    data=data,
    headers=headers,
)

doc = response.json()
print("Attached document:", doc["id"])

$folderId = '60b8d6f1e1b9b1d8c6c0d8e1';

$curl = curl_init();

curl_setopt_array($curl, array(
    CURLOPT_URL => "https://api-integration.ollang.com/integration/folder/{$folderId}/docs/upload",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => array(
        'file' => new CURLFile('/path/to/brand-guideline-v3.pdf'),
        'type' => 'guideline',
        'name' => 'Brand guideline v3',
        'language' => 'en',
    ),
    CURLOPT_HTTPHEADER => array(
        'X-Api-Key: <your-api-key>'
    ),
));

$response = curl_exec($curl);
$doc = json_decode($response, true);
curl_close($curl);

echo "Attached document: " . $doc['id'];

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "io"
    "mime/multipart"
    "net/http"
    "os"
)

func main() {
    folderID := "60b8d6f1e1b9b1d8c6c0d8e1"
    url := "https://api-integration.ollang.com/integration/folder/" + folderID + "/docs/upload"

    body := &bytes.Buffer{}
    writer := multipart.NewWriter(body)

    file, _ := os.Open("brand-guideline-v3.pdf")
    defer file.Close()

    part, _ := writer.CreateFormFile("file", "brand-guideline-v3.pdf")
    io.Copy(part, file)

    writer.WriteField("type", "guideline")
    writer.WriteField("name", "Brand guideline v3")
    writer.WriteField("language", "en")
    writer.Close()

    req, _ := http.NewRequest("POST", url, body)
    req.Header.Set("X-Api-Key", "<your-api-key>")
    req.Header.Set("Content-Type", writer.FormDataContentType())

    client := &http.Client{}
    resp, _ := client.Do(req)
    defer resp.Body.Close()

    respBody, _ := io.ReadAll(resp.Body)

    var doc map[string]interface{}
    json.Unmarshal(respBody, &doc)

    fmt.Println("Attached document:", doc["id"])
}

String folderId = "60b8d6f1e1b9b1d8c6c0d8e1";

HttpResponse<String> response = Unirest
  .post("https://api-integration.ollang.com/integration/folder/" + folderId + "/docs/upload")
  .header("X-Api-Key", "<your-api-key>")
  .field("file", new File("brand-guideline-v3.pdf"))
  .field("type", "guideline")
  .field("name", "Brand guideline v3")
  .field("language", "en")
  .asString();

JSONObject doc = new JSONObject(response.getBody());
System.out.println("Attached document: " + doc.getString("id"));

{
  "id": "60b8d6f1e1b9b1d8c6c0d8f1",
  "name": "Brand guideline v3",
  "type": "guideline",
  "url": "https://ollang-docs.s3.eu-central-1.amazonaws.com/60b8d6f1e1b9b1d8c6c0d8e5/brand-guideline-v3.pdf",
  "size": 481203,
  "sourceLanguage": "en",
  "folderId": "60b8d6f1e1b9b1d8c6c0d8e1",
  "clientId": "60b8d6f1e1b9b1d8c6c0d8e5",
  "createdAt": "2026-09-04T09:11:02.310Z",
  "updatedAt": "2026-09-04T09:11:02.310Z"
}

{
  "code": -1,
  "error": "UnknownError",
  "message": "unknown error",
  "detail": "File too large"
}

{
  "error": "Unauthorized",
  "message": "Invalid or missing API key",
  "code": "UNAUTHORIZED"
}

{
  "statusCode": 403,
  "message": "You do not have permission to modify this folder",
  "error": "Forbidden"
}

{
  "statusCode": 404,
  "message": "Folder not found",
  "error": "Not Found"
}