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

# Introduction

> Here you’ll find detailed information on every endpoint, including request parameters, response formats, and examples.

<Note>Production API endpoint URL: `https://api.paywalls.ai/v1`</Note>

## Authentication

All requests to Paywalls API require authentication using your **paywall's API key**.

### How it works

Each paywall in your account has a unique secret API key. This key identifies your paywall and ensures that only you can access and modify your data.

* **Keep your API key secure**
* **Rotate keys in your dashboard if needed**

### Adding the API key to requests

You must include your API key in the `Authorization` header of every request to the paywalls.ai API:

```shellscript theme={null}
Authorization: Bearer YOUR_API_KEY
```

For example:

```bash theme={null}
curl -X GET "https://api.paywalls.ai/v1/models" \
-H "Authorization: Bearer YOUR_API_KEY"
```

### Where to find your API key

1. Log in to your Dashboard.
2. Go to Paywalls section
3. Copy the secret APY key for the paywall you want to integrate

<Warning>
  If your API key is compromised, rotate it from the dashboard to protect your
  data.
</Warning>

### Tips for API key usage

* Never commit your API key to public repositories.
* Use environment variables (process.env.YOUR\_API\_KEY) in your backend for secure usage.
* Periodically review and rotate keys to maintain security.