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Not able to fetch contact lists - V3 Api

Campaign Collaborator
0 Votes

For below apis,




Getting below response,

{"error_key":"server_temporarily_timeout","error_message": "Endpoint request timed out"}




Campaign Expert
0 Votes


The V3 API has been degraded for more than 24 hours now. I have found a few endpoints that work but most don't.

0 Votes

Hello everyone,


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.




David B.
Tier II API Support Engineer

Campaign Collaborator
0 Votes

Thanks for reply, David

0 Votes

Hi @user431876 and @HonestA,


The 5xx errors should be resolved now.

Jimmy D.
Tier II API Support Engineer
Campaign Collaborator
0 Votes

Yes, It is. Thanks for your support.

0 Votes

cannot able to generate access token it shows an html page in postman...

0 Votes

Hello user371954,


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


Courtney E.
Tier II API Support Engineer

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