Hi
i did not get chance to use ManyChat API but i am quite confident i can complete your requirement .i can programm ManyChat bot as well and other change as well
below is not copy paste its just my introduction to you
I offer a wide range of services, including , PHP , Javascript , AJAX , WordPress , WooCommerce
I can create and deliver the project as per the information.I have skilled,
expert programmers I'm very excited to assist you in making your Sites successful
please feel free to contact me directly to discuss this position further.
Thanks