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

# Authentication

> How to authenticate requests to the Blockradar API.

The Blockradar API uses API keys to authenticate all requests. Every API key is scoped to a specific master wallet.

## Sending your API key

Include your API key in the `x-api-key` header on every request:

```bash theme={null}
curl https://api.blockradar.co/v1/wallets   -H "x-api-key: YOUR_API_KEY"
```

<Warning>
  Never expose your API key in client-side code, public repositories, or logs. Treat it like a password.
</Warning>

## Getting your API keys

1. Log in to the [Blockradar dashboard](https://dashboard.blockradar.co)
2. Navigate to your master wallet settings
3. Copy your API key from the **API Keys** section

## Key scoping

Each API key is tied to a single master wallet. If you operate multiple wallets across different networks, you will have a separate key per wallet.

<Card title="Full API Reference" icon="book" href="/en/api-reference/authentication">
  View the authentication reference in the API Reference tab.
</Card>