> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://fastpix.com/docs/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://fastpix.com/docs/_mcp/server.

# Generate video chapters

POST https://api.fastpix.com/v1/ai/{mediaId}/chapters

This endpoint divides an existing media into meaningful, time-coded chapters. Each chapter includes a title and summary so viewers can understand the structure of the video and navigate directly to relevant sections.

#### How it works

1. Send a `POST` request to this endpoint, replacing `<mediaId>` with the ID of the media for which you want to generate chapters.
2. The response confirms that the request was successful and returns the ID of the media. The job starts immediately after a successful request.
3. You can use the [video.media.ai.chapters.ready](https://fastpix.com/docs/webhooks/in-video-ai-events#videomediaaichaptersready-1) webhook event to track and notify the status.
4. After the webhook event is received, you can use the [Get video chapters](https://fastpix.com/docs/in-video-ai-api/video-chapters/get-media-ai-chapters) endpoint to retrieve the generated chapters.

**Use case**: Use this feature to generate chapters for media that has already been uploaded, without requiring the user to upload it again.

Related guide: Video chapters

Reference: https://fastpix.com/docs/in-video-ai-api/video-chapters/create-ai-chapters

## Authentication

- `Authorization` header (basic auth, required) — FastPix APIs are secured with Basic Authentication. Use your Access Token ID as the username and Secret Key as the password in the Authorization header of each API request. * Username: Access Token ID * Password: Secret Key Activate your FastPix account to generate your API credentials. See the guide here

## Request

### Path parameters

- `mediaId` (string, required) — The unique identifier assigned to the media when it is created. The value must be a valid UUID.

## Response

### 201

Successfully triggered video chapters generation.

- `success` (boolean, optional) — Shows the request status. Returns true for success and false for failure.
- `data` (AiTriggerSuccessData, optional)

## Types

### AiTriggerSuccessData

- `id` (string, optional)

## Examples

**Response**

```json
{
  "success": true,
  "data": {
    "id": "c695988b-ff84-42ae-bb21-10f284fedb0e"
  }
}
```

**SDK Code**

```python
import requests

url = "https://api.fastpix.com/v1/ai/4fa85f64-5717-4562-b3fc-2c963f66afa6/chapters"

response = requests.post(url, auth=("<username>", "<password>"))

print(response.json())
```

```javascript
const url = 'https://api.fastpix.com/v1/ai/4fa85f64-5717-4562-b3fc-2c963f66afa6/chapters';
const credentials = btoa("<username>:<password>");

const options = {method: 'POST', headers: {Authorization: `Basic ${credentials}`}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

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

func main() {

	url := "https://api.fastpix.com/v1/ai/4fa85f64-5717-4562-b3fc-2c963f66afa6/chapters"

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

	req.SetBasicAuth("<username>", "<password>")

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

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

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.fastpix.com/v1/ai/4fa85f64-5717-4562-b3fc-2c963f66afa6/chapters")

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

request = Net::HTTP::Post.new(url)
request.basic_auth("<username>", "<password>")

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

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.fastpix.com/v1/ai/4fa85f64-5717-4562-b3fc-2c963f66afa6/chapters")
  .basicAuth("<username>", "<password>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.fastpix.com/v1/ai/4fa85f64-5717-4562-b3fc-2c963f66afa6/chapters', [
  'headers' => [
  ],
    'auth' => ['<username>', '<password>'],
]);

echo $response->getBody();
```

```csharp
using RestSharp;
using RestSharp.Authenticators;

var client = new RestClient("https://api.fastpix.com/v1/ai/4fa85f64-5717-4562-b3fc-2c963f66afa6/chapters");
client.Authenticator = new HttpBasicAuthenticator("<username>", "<password>");
var request = new RestRequest(Method.POST);

IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let credentials = Data("<username>:<password>".utf8).base64EncodedString()

let headers = ["Authorization": "Basic \(credentials)"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.fastpix.com/v1/ai/4fa85f64-5717-4562-b3fc-2c963f66afa6/chapters")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```