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

# Quickstart

> Make your first ClassQuill API call in under 5 minutes.

## Step 1: Get your API key

Follow the [Authentication guide](/authentication) to create an API key in your org settings. You'll need it for every request.

## Step 2: Verify your key works

The `/v1/ping` endpoint confirms your key is valid and shows which organisation it belongs to.

<CodeGroup>
  ```bash cURL theme={null}
  curl https://api.classquill.com/v1/ping \
    -H "Authorization: Token token=ei_live_your_key_here"
  ```

  ```python Python theme={null}
  import requests

  response = requests.get(
      "https://api.classquill.com/v1/ping",
      headers={"Authorization": "Token token=ei_live_your_key_here"},
  )
  print(response.json())
  ```

  ```javascript JavaScript theme={null}
  const response = await fetch("https://api.classquill.com/v1/ping", {
    headers: { Authorization: "Token token=ei_live_your_key_here" },
  });
  const data = await response.json();
  console.log(data);
  ```
</CodeGroup>

**Expected response:**

```json theme={null}
{
  "status": "ok",
  "org_id": "ce374c65-...",
  "org_name": "Your Organisation Name"
}
```

If you see a `401`, double-check that:

* Your key starts with `ei_live_`
* The header format is exactly `Token token=ei_live_...` (note the space before `token=`)
* The key has not been revoked in your org settings

## Step 3: Fetch your sessions

Once your key is verified, you're ready to pull real data.

```bash theme={null}
curl "https://api.classquill.com/v1/sessions?limit=10" \
  -H "Authorization: Token token=ei_live_your_key_here"
```

Sessions are the core record — they power tutor earnings calculations, parent invoices, and accounting exports.

## What's next?

<CardGroup cols={2}>
  <Card title="Sessions" icon="calendar-check" href="/api-reference/sessions">
    List completed sessions, filter by tutor or student, and pull session details.
  </Card>

  <Card title="Invoices" icon="file-invoice" href="/api-reference/invoices">
    Fetch invoices by organisation, parent, or date range for accounting reconciliation.
  </Card>
</CardGroup>