Hi, thanks for your enquiry. We have this command on the page: https://www.dynadot.com/domain/api3.html under “Renew Command” section :
price_check (optional) -You can add this parameter to the command to check the price detail for renewing this domain. NOTE: Adding this parameter to command, our api will not renew the domain, but only display the price info.
Renew Domain Prices Api