Hello @KelseyT4,
Thank you for reaching out to Constant Contact API Developer Support.
There appears to have been an intermittently increased rate of '500 Internal Server Error' responses from our v3 API, between roughly 11:00 AM and 1:00 PM ET, though the issue currently appears to be resolved.
If you're continuing to receive 500 responses from our v3 API, please let us know, along with timestamps if possible. We apologize for any inconvenience this caused, and thank you for your patience.
Regards,
Aarron G.
API Support Engineer
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