Hi Tim, Yes, using OAuth you can have users login with their Constant Contact credentials and then an OAuth token will be passed back to you. You would then just store this token and use it when communicating with their account. The first step to using OAuth is to make sure you have the proper redirect URI setup for your application. You will want it to be either your domain (http://www.yoursite.com/) or even the script that would store the OAuth token (although if you just put the domain you will be able to use multiple pages/ change this dyanmically). You can then direct users to the following URL for them to login (replacing the placeholder for the API key and the Redirect URI with the proper values): ]https://oauth2.constantcontact.com/oauth2/oauth/siteowner/authorize?response_type= token &client_id=< your_API_KEY >&redirect_uri=< your_encoded_redirect_URI > Once the user logs in and grants your application privileges to access their account you'll receive a JSON response back on the Redirect URI that should look something like this: { "access_token":"a46950a6-7cad-413a-8183-550756d096f4", "expires_in":315359999, "token_type":"Bearer" } Again, just store that token and you will be able to use that for connecting to their account through the API. Hopefully that makes sense, and if not feel free to contact me or API Support directly and we will be more than happy to assist you! Thanks, Mike
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