Hello @dwarde,   Thank you for reaching out to Constant Contact's API Support.   When moving to live did you change/update the redirect URI when doing oAuth? It sounds like your Access Token is not approved to make whatever changes you are asking it to make. ... View more

Hello, Thank you for reaching out to Constant Contact API Developer Support. At this time you can create an email campaign, but not yet schedule one with our V3 API. We're still in the process of building out additional features for V3. Our V2 API has the scheduling and reporting endpoints implemented and available for use; you are welcome to still develop with our V2 API. For documentation on this in V2 see the following links. Using the Email Campaign Endpoints: https://developer.constantcontact.com/docs/email-campaigns/email-campaign-api-index.html Email Campaign Schedule Collection: https://developer.constantcontact.com/docs/campaign-scheduling/campaign-schedule-collection.html?method=POST Tracking Email Campaign Results: https://developer.constantcontact.com/docs/campaign-tracking/email-campaign-tracking-.html Regards, David B. Tier II API Support Engineer ... View more