Hello there,
I recently checked the API for my personal business and yes they are not providing the API for recurring payment. If you have used their github plugin for Paytm then we can edit that plugin to be used for recurring payment, or we will develop a plugin from scratch to match your requirements.
PS. don't miss to check our 100% completion rate and 5Star review.
We made ad-on payment gateway plugin for my SA client for woocommerce subscriptions plugin they were using on their site. And so, we will make the plugin compatible with that.
Let's discuss in PM for more on this and we are available to get started on this project.
Waiting for your message to discuss further.
Regards,
Devin.