> ## 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 Constant Contact OAuth app

> Register an OAuth app with Constant Contact and connect it to Nango

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

## Prerequisites

Before you begin, note the following requirements for Constant Contact API access:

* You must have a Constant Contact account

## Registering your application

<Steps>
  <Step title="Create a developer account">
    Go to the [Constant Contact V3 API Developer Portal](https://developer.constantcontact.com/) and sign in with your Constant Contact account.
  </Step>

  <Step title="Create a new application">
    1. Navigate to the [My Applications](https://app.constantcontact.com/pages/dma/portal/) tab in the Developer Portal
    2. Click **Create New Application** or **Add Application**
    3. Fill in all the required details.
    4. In **Application OAuth2 Settings**, select: **Authorization Code Flow and Implicit Flow.**
    5. For **Refresh Token Type**, select **Rotating Refresh Tokens**
    6. Click **Create** to create your application
  </Step>

  <Step title="Configure OAuth settings">
    1. After creating your application, click **Edit** for the app you just created
    2. In the **Redirect URI** section, add: `https://api.nango.dev/oauth/callback`
    3. Click **Save** to save your changes
  </Step>

  <Step title="Get your credentials">
    1. In your application settings, you'll find:
       * **API Key (Client ID)**: This is your `client_id` for OAuth requests
    2. Click **Generate Client Secret** to create your client secret
    3. Copy and save both the **API Key (Client ID)** and **Client Secret** securely. You'll need them when configuring the integration in Nango.

    <Warning>The client secret is only shown once when generated. Make sure to copy and save it immediately.</Warning>
  </Step>

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

## OAuth scopes

When configuring your OAuth app, you'll need to specify which scopes your app requires. For a complete list of available OAuth scopes and the endpoints they enable, see [Constant Contact's Authorization Scopes Overview](https://developer.constantcontact.com/api_guide/scopes.html).