Thanks for reaching out to Constant Contact's API Developer support.
There are currently no plans in place yet to deprecate the V2 API, however our V3 API will likely become preferred due to added features which are missing from V2.
Please let me know if you have any other questions!
Tier II API Support Engineer
View API documentation, code samples, get your API key.
We want to hear from customers like you about your favorite features and how they have helped your business or organization. Tell us by answering a few questions in...Read More