Subscriptions and Payments for a Telegram SaaS

An end-to-end subscription and billing system for a Telegram-based service, built in n8n for SaaS products, paid APIs and subscription services that need reliable payments, instant onboarding and clean accounting.

For the customer

• The customer starts the bot with /start and chooses a one-time payment or a recurring subscription.
• The bot replies with a secure, personal Stripe payment link; the customer’s Telegram ID travels with the payment.
• After payment the customer receives a confirmation and a link to the invoice in the same chat.

Behind the scenes

• A Stripe webhook drives everything after checkout, so actions run only for confirmed payments; duplicate events are dropped.
• An engineer is notified in Slack with structured client data, so the service is activated without back-and-forth.
• A PDF invoice is generated, stored in Google Drive and shared; the transaction and the invoice link are logged in Notion for accounting.
• Payment requests and their status are tracked in Google Sheets.

Business impact

• No manual billing or onboarding work.
• Fewer payment errors and no missed activations.
• Scales with the number of users; suitable for an MVP and for production.

The screenshots come from a demo environment with test data and Stripe test mode: no real customers or live payments are shown. The logic is the same as in production.