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

# RPID Configuration Overview

> Learn how to properly configure the RPID (Relying Party Identifier) for your application, especially when managing both web and native/mobile applications.

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The **RPID** (Relying Party Identifier) is a crucial security parameter in passkey authentication that defines which domains and applications can access your passkeys. Similar to how a cookie domain determines where a cookie can be used (read and written), the **RPID** determines where your passkeys can be used.

Proper **RPID** configuration is essential for ensuring seamless passkey functionality across your web and native/mobile applications. For additional information, please refer to the official [WebAuthn specification](https://www.w3.org/TR/webauthn-2/#rp-id).

You can configure the **RPID** in the [Corbado Management Console](https://app.corbado.com/settings/general?tab=URLs). Review the following pages to understand how **RPID** validation functions and what key considerations apply to your application type:

<CardGroup cols={2}>
  <Card href="/corbado-connect/helpful-guides/rpid-configuration/web" title="Web Applications" icon="globe">
    Configure **RPID** to match your web application's domain or a parent domain for consistent passkey access across subdomains.
  </Card>

  <Card href="/corbado-connect/helpful-guides/rpid-configuration/native-mobile" title="Native/Mobile Applications" icon="mobile">
    Set up **RPID** to enable passkey sharing between your web and native/mobile applications while maintaining security boundaries.
  </Card>
</CardGroup>