You can sign up for Paytm Payment Gateway at https://dashboard.paytm.com/. Just sign in with your existing Paytm account or create a new one to get started. You can check out all available plans with pricing at https://business.paytm.com/pricing

You just need your personal or business PAN number and a bank account that is in your name to sign up with Paytm for Business instantly. For plans with higher monthly limits, please refer to https://business.paytm.com/document-requirements