> 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.

# Start Job

POST https://api.sarvam.ai/translate/document/jobs/{job_id}/start

Start the translation pipeline after the file has been uploaded to the signed `upload_url`. Idempotent.

Reference: https://docs.sarvam.ai/api-reference/translate-document/start-doc-translation

## Authentication

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

## Request

### Path parameters

- `job_id` (string, required) — The `job_id` returned by POST /translate/document/jobs.

## Response

### 200

Job started.

- `job_id` (string, required)
- `job_state` (enum, required) — Aggregate job state returned by GET /jobs/\{job\_id}/live-status.
  - Allowed values: `Accepted`, `Running`, `Completed`, `PartiallyCompleted`, `Failed`
- `num_pages` (integer, optional) — Number of pages in the source document. Present for PDF jobs; omitted for Office formats.
- `warnings` (list of string, optional) — Server warnings (e.g. filename overridden from content detection). Omitted when empty.

## Errors

### 400 Bad Request Error

Bad Request — Validation error (invalid or missing field).

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

### 401 Unauthorized Error

Unauthorized. Send a valid `api-subscription-key`.

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

### 402 Payment Required Error

Payment Required — Insufficient credits to complete this operation.

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

### 404 Not Found Error

Not Found — No job exists for this job_id.

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

### 500 Internal Server Error

Internal Server Error

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

## Types

### Sarvam_Model_API_ErrorDetails

- `request_id` (string, required, nullable)
- `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`, `not_found_error`, `rate_limit_exceeded_error`, `model_call_error`, `gateway_timeout_error`, `billing_service_unavailable_error`

## Examples

**Response**

```json
{
  "job_id": "550e8400-e29b-41d4-a716-446655440000",
  "job_state": "Running",
  "num_pages": 42
}
```

**SDK Code**

```python
import requests

url = "https://api.sarvam.ai/translate/document/jobs/550e8400-e29b-41d4-a716-446655440000/start"

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

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

print(response.json())
```

```javascript
const url = 'https://api.sarvam.ai/translate/document/jobs/550e8400-e29b-41d4-a716-446655440000/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
package main

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

func main() {

	url := "https://api.sarvam.ai/translate/document/jobs/550e8400-e29b-41d4-a716-446655440000/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
require 'uri'
require 'net/http'

url = URI("https://api.sarvam.ai/translate/document/jobs/550e8400-e29b-41d4-a716-446655440000/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
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.sarvam.ai/translate/document/jobs/550e8400-e29b-41d4-a716-446655440000/start")
  .header("api-subscription-key", "<apiSubscriptionKey>")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.sarvam.ai/translate/document/jobs/550e8400-e29b-41d4-a716-446655440000/start', [
  'headers' => [
    'api-subscription-key' => '<apiSubscriptionKey>',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.sarvam.ai/translate/document/jobs/550e8400-e29b-41d4-a716-446655440000/start");
var request = new RestRequest(Method.POST);
request.AddHeader("api-subscription-key", "<apiSubscriptionKey>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.sarvam.ai/translate/document/jobs/550e8400-e29b-41d4-a716-446655440000/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()
```