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

# WebApp (MFP)

> Program × Developer: embedding the Paylead WebApp inside a bank mobile app.

The **MFP** (Modular Front Platform) is Paylead's WebApp, embedded in partner bank mobile apps via a WebView. This section covers how to integrate it.

<Info>
  For *what* the WebApp is and *which flows* it delegates to Paylead, see the [WebApp concept](/program/user-journey/concepts/web-app).
</Info>

<CardGroup cols={2}>
  <Card title="Authentication" icon="key" href="/program/webapp/authentication">
    The SSO flow between your bank app and the WebApp, covering session management, access pre-check, and silent re-authentication.
  </Card>

  <Card title="WebView configuration" icon="settings" href="/program/webapp/configuration">
    Cookie and WebView setup, User-Agent configuration, and opening URL parameters (language, visual theme).
  </Card>

  <Card title="Troubleshooting" icon="life-buoy" href="/program/webapp/troubleshooting">
    Diagnose a recurring auth screen, lost cookies, or hard-to-trace behaviour.
  </Card>

  <Card title="Mobile Bridge" icon="cable" href="/program/webapp/bridge/overview">
    How the WebApp calls native iOS/Android capabilities (open a URL, write to the clipboard, download a file) over a JSON-RPC 2.0 `postMessage` bridge.
  </Card>
</CardGroup>