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

# What is Auth Key?

> Understanding the Authentication Key in OppiWallet API

### Auth Key Overview

* **Function**: The Auth Key serves as your identifier when making API requests to OppiWallet
* **Usage**: You must include this key with every API request
* **Visibility**: This can be considered similar to a public key

### Implementation

When making requests to the OppiWallet API, include your Auth Key in the request headers:

```javascript theme={null}
const headers = {
  'x-auth-key': 'YOUR_AUTH_KEY',
  'Content-Type': 'application/json'
};
```

### Purpose

The Auth Key allows OppiWallet's systems to:

* Identify which registered user is making the request
* Associate the request with your specific API integration
* Apply the correct permissions and rate limits to your requests

### Security Considerations

While the Auth Key is similar to a public key, you should still:

* Avoid unnecessarily exposing it in client-side code
* Follow proper API key management practices
* Use environment variables to store the key in your applications