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

# xApp Nodes

<Note>
  The existing payment terms for xApps are outlined in the [Billing](https://docs.cognigy.com/ai/administer/billing/) article. Cognigy reserves the right to change the billing of xApps in the future.
</Note>

The xApp Flow Nodes allow creating xApps, flexible micro-web applications for customer self-service. You can build the actual xApp pages by yourself in various ways, for example, by providing HTML code or by specifying an Adaptive Card in JSON format.

Cognigy.AI supports the following Nodes:

<CardGroup cols={3}>
  <Card title="xApp: Init Session" href="/ai/agents/develop/node-reference/xApp/init-xApp-session">
    This Node initializes a new xApp session.
  </Card>

  <Card title="xApp: Get Session PIN" href="/ai/agents/develop/node-reference/xApp/get-xApp-session-PIN">
    This Node generates a new xApp session PIN. You can access it using the [xApp: Get Session PIN](/xApps/tokens#xapp-session-pin) token or via `input.apps.session.pin`.
  </Card>

  <Card title="xApp: Show Adaptive Card" href="/ai/agents/develop/node-reference/xApp/set-AdaptiveCard-xApp-state">
    This Node builds an xApp page by providing an Adaptive Card in JSON format.
  </Card>

  <Card title="xApp: Show HTML" href="/ai/agents/develop/node-reference/xApp/set-html-xApp-state">
    This Node builds an xApp page by providing custom HTML code.
  </Card>
</CardGroup>

## More Information

* [xApps](/xApps/overview)
* [xApp Tokens](/xApps/tokens)
* [xApp Flow API](/xApps/api)