An all-in-one SaaS platform that simplifies integration and management of billing and subscription flows, supporting redirects, billing key issuance, and automatic payment form handling.

Repository: taiengineering/tai-api Author: taiengineering The SaaS subscription payment system on the page new.taieng.co.kr/service/saas is being transitioned to a billing flow. The backend billing API is fully completed, including routes for prepare, return, and charge billing. The billing_pay.html template was created and the GET /payments/billing/pay route added. Only frontend modifications remain (Cursor work). The form charset is corrected to UTF-8 and the payment button is changed to redirect to the billing URL instead of single payment. The full subscription flow includes redirecting to the billing page, auto-loading the template, calling the API to prepare billing, filling and auto-submitting the form to inicis, issuing the billing key, entering card info, receiving the result, storing the key and activating the subscription, and redirecting to the result page. There is a dependency on fixing a payment form display issue related to domain registration.