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DELETE
/
knowledge
/
{folderId}
/
{attachmentId}
Delete a file from a knowledge folder
curl --request DELETE \
  --url https://api.langdock.com/knowledge/{folderId}/{attachmentId} \
  --header 'Authorization: Bearer <token>'
import requests

url = "https://api.langdock.com/knowledge/{folderId}/{attachmentId}"

headers = {"Authorization": "Bearer <token>"}

response = requests.delete(url, headers=headers)

print(response.text)
const options = {method: 'DELETE', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.langdock.com/knowledge/{folderId}/{attachmentId}', 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.langdock.com/knowledge/{folderId}/{attachmentId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "DELETE",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.langdock.com/knowledge/{folderId}/{attachmentId}"

	req, _ := http.NewRequest("DELETE", url, nil)

	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.delete("https://api.langdock.com/knowledge/{folderId}/{attachmentId}")
  .header("Authorization", "Bearer <token>")
  .asString();
require 'uri'
require 'net/http'

url = URI("https://api.langdock.com/knowledge/{folderId}/{attachmentId}")

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

request = Net::HTTP::Delete.new(url)
request["Authorization"] = 'Bearer <token>'

response = http.request(request)
puts response.read_body
Using our API via a dedicated deployment? Just replace api.langdock.com with your deployment’s base URL: <deployment-url>/api/public
The Knowledge Folder API manages resources that appear as Knowledge bases in the Library.
Deletes a file (attachment) from a Knowledge base. This removes the file and all associated embeddings, making the content no longer searchable.
Requires an API key with the KNOWLEDGE_FOLDER_API scope. The API key itself needs the Editor role on the Knowledge base. See Share Knowledge bases with the API for setup instructions.

​
Request Format

​
Path Parameters

ParameterTypeRequiredDescription
folderIdstringYesThe ID of the Knowledge base
attachmentIdstringYesThe ID of the attachment to delete

​
Examples

​
Delete with cURL

curl -X DELETE "https://api.langdock.com/knowledge/{folderId}/{attachmentId}" \
  -H "Authorization: Bearer YOUR_API_KEY"

​
Delete with JavaScript

const axios = require("axios");

async function deleteAttachment(folderId, attachmentId) {
  const response = await axios.delete(
    `https://api.langdock.com/knowledge/${folderId}/${attachmentId}`,
    {
      headers: {
        Authorization: "Bearer YOUR_API_KEY",
      },
    }
  );

  return response.data;
}

// Example usage
try {
  const result = await deleteAttachment("folder_abc123", "att_xyz789");
  console.log("Attachment deleted:", result.message);
} catch (error) {
  console.error("Failed to delete:", error.response?.data?.message);
}

​
Bulk Delete Example

async function deleteMultipleAttachments(folderId, attachmentIds) {
  const results = await Promise.allSettled(
    attachmentIds.map((id) => deleteAttachment(folderId, id))
  );

  const succeeded = results.filter((r) => r.status === "fulfilled").length;
  const failed = results.filter((r) => r.status === "rejected").length;

  console.log(`Deleted ${succeeded} files, ${failed} failed`);
  return results;
}

​
Response Format

​
Success Response (200 OK)

{
  status: "success";
  message: "Attachment deleted";
}

​
Example Response

{
  "status": "success",
  "message": "Attachment deleted"
}

​
Error Handling

try {
  const response = await deleteAttachment(folderId, attachmentId);
} catch (error) {
  if (error.response) {
    switch (error.response.status) {
      case 400:
        console.error("Invalid request:", error.response.data.message);
        break;
      case 401:
        console.error("Invalid or missing API key");
        break;
      case 403:
        console.error("API key does not have access to this Knowledge base");
        break;
      case 404:
        console.error("Knowledge base or attachment not found");
        break;
      case 429:
        console.error("Rate limit exceeded");
        break;
      case 500:
        console.error("Server error");
        break;
    }
  }
}

​
Important Notes

Deletion is permanent. The file and all associated embeddings will be removed and cannot be recovered.
  • The attachment must belong to the specified Knowledge base
  • The Knowledge base must be shared with your API key
  • Deleting an attachment removes it from search results immediately
  • Embeddings associated with the attachment are also deleted
Langdock intentionally blocks browser-origin requests to protect your API key and ensure your applications remain secure. For more information, please see our guide on API Key Best Practices.

Authorizations

​
Authorization
string
header
required

API key as Bearer token. Format "Bearer YOUR_API_KEY"

Path Parameters

​
folderId
string
required

The ID of the knowledge folder

​
attachmentId
string
required

The ID of the attachment to delete

Response

200

Attachment deleted successfully