> For clean Markdown of any page, append `.md` to the page URL.
> For a complete documentation index, see https://docs.sarvam.ai/llms.txt.
> For full documentation content in one file, see https://docs.sarvam.ai/llms-full.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.sarvam.ai/_mcp/server.

# Batch - Start Job

POST https://api.sarvam.ai/speech-to-text/job/v1/{job_id}/start

Start processing a speech to text bulk job after all audio files have been uploaded

Reference: https://docs.sarvam.ai/api-reference/speech-to-text/stt/job/start

## Authentication

- `api-subscription-key` header (required) — API Key authentication via header

## Request

### Path parameters

- `job_id` (string, required) — The unique identifier of the job

### Query parameters

- `ptu_id` (integer, optional, nullable)

### Headers

- `api-subscription-key` (string, optional, default: ) — Your unique subscription key for authenticating requests to the Sarvam AI Speech-to-Text API. [Here are the steps to get your api key](https://docs.sarvam.ai/api-reference-docs/authentication#obtaining-your-api-subscription-key)

## Response

### 200

Successful Response

- `job_state` (enum, required) — Job State
  - Allowed values: `Accepted`, `Pending`, `Running`, `Completed`, `Failed`
- `created_at` (string, required) — Created At
- `updated_at` (string, required) — Updated At
- `job_id` (string, required) — Job Id
- `storage_container_type` (enum, required) — Storage Container Type
  - Allowed values: `Azure`, `Local`, `Google`, `Azure_V1`
- `total_files` (integer, optional, default: 0) — Total Files
- `successful_files_count` (integer, optional, default: 0) — Success Count
- `failed_files_count` (integer, optional, default: 0) — Failed Count
- `error_message` (string, optional, default: ) — Error Message
- `job_details` (list of TaskDetail, optional) — Job details at file level.

## Errors

### 400 Bad Request Error

Bad Request

- `error` (ErrorDetails, required) — Error details

### 403 Forbidden Error

Forbidden

- `error` (ErrorDetails, required) — Error details

### 422 Unprocessable Entity Error

Unprocessable Entity

- `error` (ErrorDetails, required) — Error details

### 429 Too Many Requests Error

Quota Exceeded

- `error` (ErrorDetails, required) — Error details

### 500 Internal Server Error

Internal Server Error

- `error` (ErrorDetails, required) — Error details

### 503 Service Unavailable Error

Service Overloaded

- `error` (ErrorDetails, required) — Error details

## Types

### TaskDetail

- `inputs` (list of TaskFileDetails, optional)
- `outputs` (list of TaskFileDetails, optional)
- `state` (enum, optional)
  - Allowed values: `Success`, `API Error`, `Internal Server Error`
- `error_message` (string, optional, nullable)
- `exception_name` (string, optional, nullable)

### ErrorDetails

- `message` (string, required) — Message describing the error
- `code` (enum, required) — Error code for the specific error that has occurred. Refer to the error code documentation for more details.
  - Allowed values: `invalid_request_error`, `internal_server_error`, `unprocessable_entity_error`, `insufficient_quota_error`, `invalid_api_key_error`, `authentication_error`, `rate_limit_exceeded_error`, `not_found_error`
- `request_id` (string, optional, default: ) — Unique identifier for the request. Format: date_UUID4

### TaskFileDetails

- `file_name` (string, required)
- `file_id` (string, required)

## Examples

**Response**

```json
{
  "job_state": "Running",
  "created_at": "2025-01-01T10:00:00Z",
  "updated_at": "2025-01-01T10:01:00Z",
  "job_id": "job_9f8b7c6d5e4a3b2c1d0e",
  "storage_container_type": "Azure_V1",
  "total_files": 1,
  "successful_files_count": 0,
  "failed_files_count": 0
}
```

**SDK Code**

```python speechToTextJob_start_example
import requests

url = "https://api.sarvam.ai/speech-to-text/job/v1/job_id/start"

headers = {"api-subscription-key": "<apiSubscriptionKey>"}

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

print(response.json())
```

```javascript speechToTextJob_start_example
const url = 'https://api.sarvam.ai/speech-to-text/job/v1/job_id/start';
const options = {method: 'POST', headers: {'api-subscription-key': '<apiSubscriptionKey>'}};

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

```go speechToTextJob_start_example
package main

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

func main() {

	url := "https://api.sarvam.ai/speech-to-text/job/v1/job_id/start"

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

	req.Header.Add("api-subscription-key", "<apiSubscriptionKey>")

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

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

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

}
```

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

url = URI("https://api.sarvam.ai/speech-to-text/job/v1/job_id/start")

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

request = Net::HTTP::Post.new(url)
request["api-subscription-key"] = '<apiSubscriptionKey>'

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

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

HttpResponse<String> response = Unirest.post("https://api.sarvam.ai/speech-to-text/job/v1/job_id/start")
  .header("api-subscription-key", "<apiSubscriptionKey>")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.sarvam.ai/speech-to-text/job/v1/job_id/start', [
  'headers' => [
    'api-subscription-key' => '<apiSubscriptionKey>',
  ],
]);

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

```csharp speechToTextJob_start_example
using RestSharp;

var client = new RestClient("https://api.sarvam.ai/speech-to-text/job/v1/job_id/start");
var request = new RestRequest(Method.POST);
request.AddHeader("api-subscription-key", "<apiSubscriptionKey>");
IRestResponse response = client.Execute(request);
```

```swift speechToTextJob_start_example
import Foundation

let headers = ["api-subscription-key": "<apiSubscriptionKey>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.sarvam.ai/speech-to-text/job/v1/job_id/start")! 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()
```