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

# Backend SDK Overview

## Rownd Backend SDK Features

Rownd's Backend SDKs provide powerful tools for secure and efficient server-side authentication and user management.

### Robust Token Management

Ensure secure access to your backend resources with comprehensive token management:

* **Token Verification**: Easily verify user tokens to authenticate requests
* **Token Refresh**: Automatically handle token expiration and renewal
* **Custom Claims**: Add and manage custom claims for user tokens

### Understanding Rownd Tokens

Rownd uses JWT (JSON Web Tokens) for authentication. Here's an example token payload:

```json theme={null}
json
{
"jti": "e5aded8f-4950-4215-9a45-dc3e7x8575e90",
"aud": [
"app:app_v8q15ahdmpx3wqnbm6j19grlx",
"app_variant:cm4swjkos008x5bfc8x48d70xu"
],
"sub": "user_o7jyzlzbga2uhly698ba8a1s",
"iat": 1734467046,
"exp": 1734470646,
"iss": "https://api.rownd.io",
"https://auth.rownd.io/app_user_id": "user_o7jyzlzbga2uhly698ba8a1s",
"https://auth.rownd.io/is_verified_user": true,
"https://auth.rownd.io/auth_level": "verified"
}
```

Standard JWT claims:

* **jti**: Unique identifier for this token
* **aud**: Array of audiences this token is intended for (includes Rownd app ID and app variant ID if applicable);
* **sub**: Subject identifier (Rownd user ID)
* **iat**: Timestamp when the token was issued
* **exp**: Timestamp when the token expires
* **iss**: Token issuer (Rownd API)

Rownd-specific claims:

* **[https://auth.rownd.io/app\_user\_id](https://auth.rownd.io/app_user_id)**: User's unique identifier in Rownd
* **[https://auth.rownd.io/is\_verified\_user](https://auth.rownd.io/is_verified_user)**: Boolean indicating if the user is verified
* **[https://auth.rownd.io/auth\_level](https://auth.rownd.io/auth_level)**: User's authentication level (e.g., "verified")

### Seamless Integration

Integrate Rownd's backend capabilities with your existing infrastructure:

* **Framework Compatibility**: Support for popular server-side frameworks like Node.js, Django, and .NET
* **API Integration**: Effortlessly call Rownd's backend services
* **Server-Side Rendering Support**: Compatible with frameworks like Next.js and Remix for efficient SSR

### Advanced User Management

Manage user data and authentication flows with ease:

* **User Profiles**: Access and update user profiles programmatically
* **Role-Based Access Control**: Implement fine-grained access control for different user roles
* **Event Hooks**: Trigger custom logic on authentication events

### Developer-Friendly Tools

Streamline backend development with comprehensive tools and support:

* **Detailed Documentation**: In-depth guides and API references
* **Versioning and Compatibility**: Clear upgrade paths and backward compatibility
* **Technical Support**: Access to expert engineering support

## Steps for getting started:

1. [Set up your Rownd account](/welcome/getting-started) (only takes a minute).
2. Create an [app key](/configuration/app-credentials).
3. Install Rownd using an SDK.
4. [Configure customizations](/configuration/overview) and sign-in methods from the Rownd platform.

## Rownd Backend SDKs:

<CardGroup>
  <Card title="Node.js" icon="node" href="/sdk-reference/backend/nodejs">
    JavaScript and TypeScript
  </Card>

  <Card title="Go" icon="golang" href="/sdk-reference/backend/go">
    Python
  </Card>

  <Card title="Django" icon="python" href="/sdk-reference/backend/django">
    Python
  </Card>

  <Card title=".NET" icon="microsoft" href="/sdk-reference/backend/dotnet">
    C#
  </Card>

  <Card
    title="Ruby on Rails"
    icon={<svg
            className="h-6 w-6 bg-primary dark:bg-primary-light"
            style={{
                "WebkitMaskImage": "url('/images/ruby-on-rails.svg')",
                "WebkitMaskRepeat": "no-repeat",
                "WebkitMaskPosition": "center center",
            }}
        />}
    href="/sdk-reference/backend/ruby-on-rails"
  />

  <Card
    title="Convex"
    icon={<svg
        className="h-6 w-6 bg-primary dark:bg-primary-light"
        style={{
            "WebkitMaskImage": "url('/images/convex.svg')",
            "WebkitMaskRepeat": "no-repeat",
            "WebkitMaskPosition": "center center",
        }}
    />}
    href="/sdk-reference/backend/convex"
  >
    Convex
  </Card>
</CardGroup>