import requests

url = "https://api.musicgpt.com/api/public/v1/audio_speed_changer"
headers = {"Authorization": "<API_KEY>"}

payload = {
    "speed_change_factor": 1.5,
    "output_extension": "mp3"
}

# Option 1: audio_url
payload["audio_url"] = "<YOUR_AUDIO_URL>"
response = requests.post(url, headers=headers, data=payload)

# Option 2: File Upload
# with open("input_audio.mp3", "rb") as f:
#     files = {"audio_file": f}
#     response = requests.post(url, headers=headers, data=payload, files=files)

print(response.json())

<?php
$url = 'https://api.musicgpt.com/api/public/v1/audio_speed_changer';
$headers = ['Authorization: <API_KEY>'];

$data = [
    'speed_change_factor' => 1.5,
    'output_extension' => 'mp3'
];

// Option 1: audio_url
$data['audio_url'] = '<YOUR_AUDIO_URL>';

// Option 2: File Upload
// $data['audio_file'] = new CURLFile('input_audio.mp3');

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
echo $response;

package main

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

func main() {
	url := "https://api.musicgpt.com/api/public/v1/audio_speed_changer"
	apiKey := "<API_KEY>"

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

	writer.WriteField("speed_change_factor", "1.5")
	writer.WriteField("output_extension", "mp3")

	// Option 1: audio_url
	writer.WriteField("audio_url", "<YOUR_AUDIO_URL>")

	// Option 2: File Upload
	// file, _ := os.Open("input_audio.mp3")
	// defer file.Close()
	// part, _ := writer.CreateFormFile("audio_file", "input_audio.mp3")
	// io.Copy(part, file)

	writer.Close()

	req, _ := http.NewRequest("POST", url, body)
	req.Header.Add("Authorization", apiKey)
	req.Header.Add("Content-Type", writer.FormDataContentType())

	resp, _ := http.DefaultClient.Do(req)
	defer resp.Body.Close()
	response, _ := io.ReadAll(resp.Body)
	fmt.Println(string(response))
}

// Java version omitted for brevity; request if needed.

curl --request POST \
  --url https://api.musicgpt.com/api/public/v1/audio_speed_changer \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: multipart/form-data' \
  --form audio_url=https://example.com/input_audio.mp3 \
  --form speed_change_factor=1.5 \
  --form 'audio_file=<string>' \
  --form output_extension=mp3 \
  --form webhook_url=http://your-webhook-url.com/callback \
  --form 0.audio_file='@example-file' \
  --form 1.audio_file='@example-file'

const form = new FormData();
form.append('audio_url', 'https://example.com/input_audio.mp3');
form.append('speed_change_factor', '1.5');
form.append('audio_file', '<string>');
form.append('output_extension', 'mp3');
form.append('webhook_url', 'http://your-webhook-url.com/callback');
form.append('0.audio_file', '{
  "fileName": "example-file"
}');
form.append('1.audio_file', '{
  "fileName": "example-file"
}');

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

options.body = form;

fetch('https://api.musicgpt.com/api/public/v1/audio_speed_changer', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

require 'uri'
require 'net/http'

url = URI("https://api.musicgpt.com/api/public/v1/audio_speed_changer")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'multipart/form-data; boundary=---011000010111000001101001'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"audio_url\"\r\n\r\nhttps://example.com/input_audio.mp3\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"speed_change_factor\"\r\n\r\n1.5\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"audio_file\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"output_extension\"\r\n\r\nmp3\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"webhook_url\"\r\n\r\nhttp://your-webhook-url.com/callback\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"0.audio_file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"1.audio_file\"; 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

{
  "success": true,
  "conversion_id": "conv999",
  "credit_estimate": 45,
  "conversion_path": "https://example.com/output/converted_audio.mp3",
  "message": "Speed change task queued successfully"
}

{
  "success": false,
  "error": "Invalid speed_change_factor"
}

{
  "success": false,
  "error": "Authentication failed"
}

{
  "success": false,
  "error": "Insufficient credits for this operation",
  "required_credits": 45,
  "available_credits": 30
}

{
  "success": false,
  "error": "User subscription plan not found"
}

{
  "success": false,
  "error": "Internal server error during processing"
}