Hello NahilN,
Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API. I apologize for the delay in our reply.
We still do not have an endpoint for the QuickSend feature at this time, however, we greatly appreciate your feedback. It has been submitted for review and consideration by our engineering team. Your feedback and experience with this request is essential to improving our product, so thank you for reaching out to us regarding this matter.
Please let us know if you have any other questions!
Regards,
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