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

# How to register your own Mercury OAuth app

> Request OAuth access from Mercury and connect your app to Nango

This guide shows you how to register your own app with Mercury to obtain your OAuth credentials (client ID & secret). These are required to let your users grant your app access to their Mercury account.

<Steps>
  <Step title="Request OAuth access">
    1. Submit Mercury's [integration request form](https://mercurytechnologies.notion.site/2b1951a7f2158076b600db0ce173317c) with:
       * Your company name and website.
       * Company address.
       * A short description of your company.
       * Details about the product you plan to integrate with Mercury.
       * How you plan to use Mercury's API.
    2. Mercury will review your request. Approval timelines vary; they may ask for additional information. Approval depends on security, use case fit, and regulatory considerations.
  </Step>

  <Step title="Provide technical setup (after approval)">
    When your integration is approved, provide Mercury with:

    * **Redirect URI:** `https://api.nango.dev/oauth/callback`.
    * Links to your app's terms of service, privacy policy, and logo.
    * Your **GPG public key** so Mercury can securely send your client credentials.
  </Step>

  <Step title="Receive credentials">
    Mercury will create your OAuth2 client and securely share:

    * **Client ID** and **Client secret**.
    * Credentials for a **test client** that can be used with Mercury [sandbox](https://docs.mercury.com/reference/using-mercury-sandbox).
      Save these; you will need them when configuring the Mercury integration in Nango.
  </Step>

  <Step title="Next">
    Follow the [*Quickstart*](/getting-started/quickstart).
  </Step>
</Steps>

For more details, see the [Mercury OAuth2 API documentation](https://docs.mercury.com/docs/integrations-with-oauth2).

***