Thank you for your patience as we work through this. We are currently experiencing intermittent gateway timeout errors with our V3 API. I have asked that our status page to be updated to reflect this current system issue. We are still investigating the root cause. While I can't provide an ETA on a fix, I can say that we are taking this issue seriously and that this is currently our top priority.
Tier II API Support Engineer
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.
Based on our logs, it looks like you may have already resolved your issue, but if not, here is some more information:
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 an account once.
You'll want to paste the Authorization Request URL into the browser, grant access, and then you will be redirected to a URL containing the Authorization Code.
After the Authorization Code is returned in the browser, you should be able to take that value and perform the rest of the authorization process within your program.
OAuth2 Authorization Code Flow
Please have a look and let us know if you have any other questions!
You can also reach our team directly/securely via email at firstname.lastname@example.org