Setting Up a Constant Contact REST Connection Manager

The REST Connection Manager is an SSIS connection manager that can be used to establish connections and facilitate data integration with REST based APIs and services such as Constant Contact, among many more.

Integration for Constant Contact is enabled by the following two components:

To add a new connection, right-click the Connection Manager area in your Visual Studio project, and choose "New Connection..." from the context menu. You will be prompted the "Add SSIS Connection Manager" window. Select the "REST (KingswaySoft)" item to add a new REST Connection Manager.

New SSIS Connection

Add SSIS REST Connection Manager

The REST Connection Manager contains 2 pages of configuration.

  • General
  • Advanced Settings

General page

The General page allows you to specify connection properties and login credentials for Constant Contact REST service:

SSIS REST Constant Contact Connection Manager

Service Name

The REST service that will be connected to.

API Version

Choose the API version:

  • V3 (since v22.1)
  • V2
API Throttle Rate

The API Throttling Rate will limit the number of requests that can be sent per second.

Generate Token File…

This button allows you to log in to the service endpoint and authorize your app to generate a token.

Constant Contact Connection Manager - OAuth

  • App Provided by KingswaySoft: use the Client Id and Secret that is provided by KingswaySoft for your convenience when setting up the connection, it should NEVER be used for production purposes.
  • My Own: specify your own application registration with Constant Contact
    • Client Id
    • Client Secret
    • RedirectUrl
    • Scope
    • Use PKCE: Enable this option to use the PKCE OAuth authorization code flow.

Warning: The KingswaySoft OAuth App is provided for your convenience when setting up the connection, and it should NEVER be used for production purposes. We would recommend you create your own app to connect to your instance, in which case you have better control of the access and also the token generated. 

Sign in using the default web browser

When this option is checked the Generate Token File button will open your default web browser in order to complete the OAuth authentication.

When this option is unchecked, the Generate Token File button will complete the entire OAuth authentication process inside of the toolkit.

Path to Token File

The path to the Constant Contact v3 API token file on the file system.

Token File Password

The password to the token file.

Access Token

If you have an Access Token that you would like to use, enter it in the access token field. If you do not have a Constant Contact access token you can generate one by clicking the Generate Token button. Note this property only applies to Constance Contact v2 API.

Test Connection

After all the connection information has been provided, you may click the "Test Connection" button to test if the user credentials entered can connect to the selected REST service.

Advanced Settings page

REST Connection Manager - Advanced

Proxy Mode

The Proxy Mode option allows you to specify how you want to configure the proxy server setting. There are three options available:

  • No Proxy
  • Auto-detect (Using system-configured proxy)
  • Manual
Proxy Server

Using the Proxy Server option allows you to specify the name of the proxy server for the connection.


The Port option allows you to specify the port number of the proxy server for the connection.

Username (Proxy Server Authentication)

The Username option (under Proxy Server Authentication) allows you to specify the proxy user account.

Password (Proxy Server Authentication)

The Password option (under Proxy Server Authentication) allows you to specify the proxy user's password.

Note: The Proxy Password is not included in the connection manager's ConnectionString property by default. This is by design for security reasons. However, you can include it in your ConnectionString if you want to parameterize your connection manager. The format would be ProxyPassword=myProxyPassword; (make sure you have a semicolon as the last character). It can be anywhere in the ConnectionString.


The number of seconds requests should wait before timing out.

Retry on Intermittent Errors

The retry on intermittent errors option determines if requests will be retried when there is an error. If this option is checked, requests will be retried up to 3 times.

Ignore Certificate Errors

This option can be used to ignore those SSL certificate errors when connecting to Constant Contact servers.

Warning: Enabling the "Ignore Certificate Errors" option is generally NOT recommended, particularly for production instances. Unless there is a strong reason to believe the connection is secure - such as the network communication is only happening in an internal infrastructure, this option should be unchecked for best security.