> ## Documentation Index
> Fetch the complete documentation index at: https://docs.duix.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get token

> The access token authenticates API requests to Duix interactive services. Include the token in the HTTP header for all API calls.

## Overview

The **access token** serves as the authentication credential for all Duix interactive service APIs.\
Each HTTP request must include the token in the **Authorization Header**.

***

## How to Generate an Access Token

### Prerequisites

Before generating a token, ensure you have the following:

* **appId** — The unique identifier of your application.
* **appKey** — The secret key associated with your application.

***

### Steps to Generate a Token

1. Generate a **JWT signature** using your `appId` and `appKey`.
2. Pass the generated signature to the H5 SDK `init` method.

***

## Signature Generation

The signature is implemented using **JWT (JSON Web Token)**.\
Use the following parameters and example code to generate a valid signature.

### Parameters

| Name   | Type    | Description                                        | Example   |
| ------ | ------- | -------------------------------------------------- | --------- |
| appId  | string  | Application identifier obtained after registration | `xxxxxxx` |
| appKey | string  | Application secret key obtained after registration | `xxxxxxx` |
| sigExp | integer | Signature validity period (in seconds)             | `1800`    |

***

## Example: Java Implementation

### Add Maven Dependency

```xml theme={null}
<dependency>
    <groupId>com.auth0</groupId>
    <artifactId>java-jwt</artifactId>
    <version>3.8.3</version>
</dependency>

```

```java theme={null}
import com.auth0.jwt.JWT;
import com.auth0.jwt.algorithms.Algorithm;
import java.util.Calendar;
import java.util.Date;

public class SigUtils {
    /**
     * Create JWT Signature
     *
     * @param appId  Application ID
     * @param appKey Application Secret Key
     * @param sigExp Signature validity duration (seconds)
     * @return JWT signature string
     */
    public static String createSig(String appId, String appKey, int sigExp) {
        Calendar nowTime = Calendar.getInstance();
        nowTime.add(Calendar.SECOND, sigExp);
        Date expiresDate = nowTime.getTime();

        return JWT.create()
                // Issued time
                .withIssuedAt(new Date())
                // Expiration time
                .withExpiresAt(expiresDate)
                // Payload data
                .withClaim("appId", appId)
                // Sign using HMAC256 with appKey
                .sign(Algorithm.HMAC256(appKey));
    }
}
```

Note: This token is the H5 SDK signature value (`sign`).

### Integration

Once you have your appId, appKey, and generated token, follow the SDK and API guides to connect Duix to your application.