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

# Authentication

> Use an API key from the app to call the Customer API — no login.

The Customer API uses **only API keys**. There is no login, password, or Bearer token. Generate a key in the app and send it with every request.

## Get an API key

1. Open the [Dashboard](https://geoark.ai) and go to **API Keys** (Custom plan).
2. Create a key and copy it — the value is shown only once.

## Send the key with requests

**Header (recommended):**

```http theme={null}
POST https://api.geoark.ai/api/customer/v1/reports/brands
Content-Type: application/json
X-API-Key: your_api_key_here

{}
```

**Query parameter (optional):**

```http theme={null}
POST https://api.geoark.ai/api/customer/v1/reports/brands?api_key=your_api_key_here
Content-Type: application/json

{}
```

## Errors

* **401** — Invalid or missing API key.
* **402** — Paid subscription required; create an API key on the Custom plan.