Hello,
Thank you for reaching out to Constant Contact API Developer Support.
Can you clarify what you're looking to accomplish? Our Authorization headers should be Bearer rather than Basic, and your access token is obtained during the OAuth flow.
Are you using our V2 or V3 API?
Regards,
David B.
Tier II API Support Engineer
I am using v3
Hello,
Where are you being prompted to do this?
Are you working in an app you are building, or are you using a 3rd party integration?
Regards,
David B.
Tier II API Support Engineer
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