> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.alephant.io/api-reference/saa-s-api/auth/refresh-access-token/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.alephant.io/_mcp/server.

# Refresh access token

POST https://alephant.io/api/v1/auth/refresh

Uses httpOnly refresh token cookie and X-CSRF-Token. Returns new access token and rotates refresh cookie.

Reference: https://developers.alephant.io/api-reference/saa-s-api/auth/refresh-access-token

## Servers

- `https://alephant.io` (Production, default)
- `https://dev.alephant.io` (Development)

## Request

### Headers

- `X-CSRF-Token` (string, required) — CSRF token from GET /auth/csrf

## Response

### 200

data: \{ accessToken }

- `map from string to any`

## Errors

### 401 Unauthorized Error

AUTH_REFRESH_INVALID

- `map from string to any`

### 403 Forbidden Error

CSRF_INVALID

- `map from string to any`

## Examples

**Response**

```json
{}
```

**SDK Code**

```python
import requests

url = "https://alephant.io/api/v1/auth/refresh"

headers = {"X-CSRF-Token": "X-CSRF-Token"}

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

print(response.json())
```

```javascript
const url = 'https://alephant.io/api/v1/auth/refresh';
const options = {method: 'POST', headers: {'X-CSRF-Token': 'X-CSRF-Token'}};

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://alephant.io/api/v1/auth/refresh"

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

	req.Header.Add("X-CSRF-Token", "X-CSRF-Token")

	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://alephant.io/api/v1/auth/refresh")

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

request = Net::HTTP::Post.new(url)
request["X-CSRF-Token"] = 'X-CSRF-Token'

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://alephant.io/api/v1/auth/refresh")
  .header("X-CSRF-Token", "X-CSRF-Token")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://alephant.io/api/v1/auth/refresh', [
  'headers' => [
    'X-CSRF-Token' => 'X-CSRF-Token',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://alephant.io/api/v1/auth/refresh");
var request = new RestRequest(Method.POST);
request.AddHeader("X-CSRF-Token", "X-CSRF-Token");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["X-CSRF-Token": "X-CSRF-Token"]

let request = NSMutableURLRequest(url: NSURL(string: "https://alephant.io/api/v1/auth/refresh")! 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()
```