> ## 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.

**1. 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.

**2. 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.

**3. Receive credentials**

Once your OAuth2 client is created, Mercury will securely share your **client ID** and **client secret**, as well as credentials for a **test client** that can be used in their sandbox environment.

Save all credentials — you will need both the production and sandbox sets when configuring the Mercury integration in Nango.

**4. Next**

Follow the [*Quickstart*](https://nango.dev/docs/getting-started/quickstart.md).

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

***


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.