curl --request POST \
  --url https://api.sigmamind.ai/v1/knowledge-bases \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-API-Key: <api-key>' \
  --form 'knowledge_base_files=<string>' \
  --form knowledge_base_files.items='@example-file'

import requests

url = "https://api.sigmamind.ai/v1/knowledge-bases"

files = { "knowledge_base_files.items": ("example-file", open("example-file", "rb")) }
payload = { "knowledge_base_files": "<string>" }
headers = {"X-API-Key": "<api-key>"}

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

print(response.text)

const form = new FormData();
form.append('knowledge_base_files', '<string>');
form.append('knowledge_base_files.items', '{
  "fileName": "example-file"
}');

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

options.body = form;

fetch('https://api.sigmamind.ai/v1/knowledge-bases', 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.sigmamind.ai/v1/knowledge-bases",
  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=\"knowledge_base_files\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"knowledge_base_files.items\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Content-Type: multipart/form-data",
    "X-API-Key: <api-key>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.sigmamind.ai/v1/knowledge-bases"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"knowledge_base_files\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"knowledge_base_files.items\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-API-Key", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.sigmamind.ai/v1/knowledge-bases")
  .header("X-API-Key", "<api-key>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"knowledge_base_files\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"knowledge_base_files.items\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sigmamind.ai/v1/knowledge-bases")

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

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"knowledge_base_files\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"knowledge_base_files.items\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--"

response = http.request(request)
puts response.read_body

{
  "kbId": "kb_6sbr3tbMX757M0VD",
  "name": "Support FAQs",
  "files": [
    {
      "documentId": "doc_a1b2c3d4e5f67890",
      "type": "url",
      "content": "https://docs.example.com/guide"
    }
  ],
  "createdAt": "2026-05-06T11:15:02.073Z",
  "updatedAt": "2026-05-06T11:15:02.073Z"
}

{
  "error": "Bad Request",
  "message": "Invalid request parameters",
  "path": "/v1/knowledge-bases",
  "status": 400,
  "timestamp": "2026-05-14T14:27:21.959Z"
}

{
  "error": "Unauthorized",
  "message": "X-API-Key is missing or invalid",
  "path": "/v1/knowledge-bases",
  "status": 401,
  "timestamp": "2026-05-14T14:27:21.959Z"
}

{
  "error": "Forbidden",
  "message": "Access denied for this resource",
  "path": "/v1/knowledge-bases",
  "status": 403,
  "timestamp": "2026-05-14T14:27:21.959Z"
}

{
  "error": "Not Found",
  "message": "The requested resource was not found",
  "path": "/v1/knowledge-bases",
  "status": 404,
  "timestamp": "2026-05-14T14:27:21.959Z"
}

{
  "error": "Payload Too Large",
  "message": "An uploaded file exceeds the per-file size limit (25 MB).",
  "path": "/v1/knowledge-bases",
  "status": 413,
  "timestamp": "2026-05-14T14:27:21.959Z"
}

{
  "error": "Unsupported Media Type",
  "message": "Uploaded file type is not supported. Allowed: PDF, TXT, HTML, Markdown, DOCX.",
  "path": "/v1/knowledge-bases",
  "status": 415,
  "timestamp": "2026-05-14T14:27:21.959Z"
}

{
  "error": "Internal Server Error",
  "message": "Something went wrong on the server",
  "path": "/v1/knowledge-bases",
  "status": 500,
  "timestamp": "2026-05-14T14:27:21.959Z"
}