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# Prepare a WAV media asset

POST https://api.telekesher.dev/api/v1/media/assets
Content-Type: application/json

Fetch and validate a WAV source asynchronously. Retry with the same `Idempotency-Key` and body to receive the same asset.

Reference: https://docs.telekesher.dev/api/media-assets/create-media-asset

## Authentication

- `Authorization` header (bearer token, required) — Application auth. Send `Authorization: Bearer <app_uuid>:<api_key>` using any active key in the app's collection. See [Authentication](https://voice-platform.docs.buildwithfern.com/api/authentication) for details.

## Request

### Headers

- `Idempotency-Key` (string, required) — Optional key for safely retrying mutating requests. See [Idempotency](https://voice-platform.docs.buildwithfern.com/idempotency) for details.

### Body (application/json)

- `source_url` (string, required) — Public HTTP or HTTPS URL of the WAV file to prepare.
- `ttl_seconds` (integer, optional) — Optional asset lifetime in seconds. The service default applies when omitted.

## Response

### 201

Asset accepted or replayed

- `asset_id` (string, required)
- `created_at` (datetime, required)
- `status` (enum, required)
  - Allowed values: `preparing`, `ready`, `failed`, `deleting`, `expired`
- `duration_ms` (integer, optional)
- `expires_at` (datetime, optional)
- `failure_reason` (string, optional)
- `format` (object, optional)
  - `bits_per_sample` (integer, required)
  - `channels` (integer, required)
  - `sample_rate` (integer, required)
- `size_bytes` (integer, optional)

## Examples

**Request**

```json
{
  "source_url": "https://cdn.example.com/prompt.wav",
  "ttl_seconds": 3600
}
```

**Response**

```json
{
  "asset_id": "0123456789abcdef0123456789abcdef",
  "created_at": "2026-08-17T00:00:00Z",
  "status": "preparing",
  "expires_at": "2026-08-18T00:00:00Z"
}
```

**SDK Code**

```python Media Assets_createMediaAsset_example
import requests

url = "https://api.telekesher.dev/api/v1/media/assets"

payload = {
    "source_url": "https://cdn.example.com/prompt.wav",
    "ttl_seconds": 3600
}
headers = {
    "Idempotency-Key": "Idempotency-Key",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Media Assets_createMediaAsset_example
const url = 'https://api.telekesher.dev/api/v1/media/assets';
const options = {
  method: 'POST',
  headers: {
    'Idempotency-Key': 'Idempotency-Key',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: '{"source_url":"https://cdn.example.com/prompt.wav","ttl_seconds":3600}'
};

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

```go Media Assets_createMediaAsset_example
package main

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

func main() {

	url := "https://api.telekesher.dev/api/v1/media/assets"

	payload := strings.NewReader("{\n  \"source_url\": \"https://cdn.example.com/prompt.wav\",\n  \"ttl_seconds\": 3600\n}")

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

	req.Header.Add("Idempotency-Key", "Idempotency-Key")
	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

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

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

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

}
```

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

url = URI("https://api.telekesher.dev/api/v1/media/assets")

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

request = Net::HTTP::Post.new(url)
request["Idempotency-Key"] = 'Idempotency-Key'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"source_url\": \"https://cdn.example.com/prompt.wav\",\n  \"ttl_seconds\": 3600\n}"

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

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

HttpResponse<String> response = Unirest.post("https://api.telekesher.dev/api/v1/media/assets")
  .header("Idempotency-Key", "Idempotency-Key")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"source_url\": \"https://cdn.example.com/prompt.wav\",\n  \"ttl_seconds\": 3600\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.telekesher.dev/api/v1/media/assets', [
  'body' => '{
  "source_url": "https://cdn.example.com/prompt.wav",
  "ttl_seconds": 3600
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
    'Idempotency-Key' => 'Idempotency-Key',
  ],
]);

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

```csharp Media Assets_createMediaAsset_example
using RestSharp;

var client = new RestClient("https://api.telekesher.dev/api/v1/media/assets");
var request = new RestRequest(Method.POST);
request.AddHeader("Idempotency-Key", "Idempotency-Key");
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"source_url\": \"https://cdn.example.com/prompt.wav\",\n  \"ttl_seconds\": 3600\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Media Assets_createMediaAsset_example
import Foundation

let headers = [
  "Idempotency-Key": "Idempotency-Key",
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "source_url": "https://cdn.example.com/prompt.wav",
  "ttl_seconds": 3600
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.telekesher.dev/api/v1/media/assets")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

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()
```