This has worked in the past but recently stopped working. GET requests to campaigns to retrieve a list of campaigns works fine, but ones requesting a specific campaign fail.
Is this an issue with Constant Contact's servers/API?
Thank you for reaching out to Constant Contact API Developer Support.
We did experience an issue with our V1 API that caused a large number of 500 errors. We have since fixed that issue. Are you still seeing these errors?
Tier II API Support Engineer