ContactList GET Request - 'Modified_since' Not Working?


ContactList GET Request - 'Modified_since' Not Working?

Hi everyone,


I am using a GET request on the ContactList method to view a list of customers in my employer's Constant Contact list, and I wish to see contacts that have modified their settings on today's date. However, I am getting data returned to me that shows dates earlier than today. Does anyone know why this is happening? I have attached a couple screenshots that show you what I am talking about.


Thank you for any help you may be able to provide.

Forum query 1.PNG

Forum query 2.PNG




Based on your screenshots, something is definitely happening that is not intended. There is an issue that may be realted to this that we recently discovered and are currently working to triage. Would you be willing to send us an email with the full details for the API request so that we can investigate what is happening?


The best email address to reach our API Support team is


Best Regards,

Elijah G.
API Support Engineer

I'll send an email to the link you provided. Thanks for replying.

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