Programmatic Access to v3 API without web sign in

Regular Participant

I'm looking to write a script to automate a few tasks with just a single connection with no user interaction.


I can generate the authorization url, and when I do Postman does show me the CC login prompt. However, I don't want to have to log in via a web page to grant access each time I run this script. I know with the v2 API there was a way to just use the access token given through the site along with the client id and secret, but there doesn't seem to be a way to do that in v3. I am fine even with having to use my user credentials to log in somewhere if I knew how to push those credentials within the script to receive the proper authorization code back. It doesn't make sense to try to generate a refresh token as I would have to store the new one somewhere each time I run this script (either scheduled or manually).


I thought it made more sense to do this with v3, since I assume that v2 will be deprecated at some point but otherwise this seems like it is more trouble than it's worth. I also don't understand why there is not a flow for this as it seems like a rather common thing to need to access the endpoints programmatically without needing a web interface.

Occasional Participant

I am also interested in signing in without a web sign in. It does not make sense to me that I can't. I'm trying to manage my own contacts, list and email delivery via my own services, no UI.

Hello Everyone,


Thank you for reaching out to Constant Contact's API Support.


We are looking in to other options to authenticate. As of right now you will need to go through the oAuth flow listed in the v3 documentation to get the Access Token and Refresh Token. Please keep in mind the need to enter the Constant Constact username/password and clicking Allow/Deny only occurs once. After you do that you just need to track/save the Access and Refresh Tokens.

Jimmy D.
Tier II API Support Engineer

I am looking to do some of my own automation.  This would be a case where there is not a user, there is not a browser to allow the access.  OAuth2 is great when you have a user doing the work and using a browser.  When you do not have this, it does not work very well.

Regular Participant

This is the first time I've checked this thread in awhile. Disappointing they still have done nothing with this apparently, since it seems like a very common use case.

Frequent Participant

Almost a year later and nothings changed.

Occasional Participant

Anything with this issue? I've got same problem, our application uses api to create new contacts programatically, but now we can't do it with OAuth...

Hello EmmaH41,


Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.


There is currently no way to bypass the initial Authorization Request screen, which can only be accessed/authorized via a browser window, but you should only need to authorize/connect an account once. 


After you complete the OAuth2 Authorization Code Flow for V3, Constant Contact returns an access token and refresh token. You can use access tokens to make requests using the V3 API, and you can use the refresh tokens to obtain new access tokens without any user input. This ensures that you only need to authenticate the account you’ll be connecting to once. After the initial authentication, you’ll just use the refresh token and access token to complete your future requests.


V3 OAuth2 Authorization Code Flow


V3 OAuth2 Tokens Overview


Please have a look and let us know if you have any other questions!


Courtney E.
Tier II API Support Engineer

Did I answer your question?
If so, please mark my post as an "Accepted Solution" by clicking the Accept as Solution button in the bottom right hand corner of this post.
Developer Portal

View API documentation, code samples, get your API key.

Visit Page


API Updates

Join our list to be notified of new features and updates to our V3 API.

Sign Up