Verify Telegram Channel Subscriptions with Postgres Access Control

This n8n workflow enables Telegram bot developers and marketers to automatically verify if users have subscribed to specific Telegram channels before providing access to premium resources or rewards. It uses a Postgres database to manage channel IDs and user verification status, allowing dynamic addition and removal of channels via bot commands. Upon verification, users receive confirmation and optionally access to files (Google Drive integration is configurable).

Key benefits include significant time savings by eliminating manual checks, enhanced security through bot-enforced access control, and scalability for large user bases. The workflow handles referral links for easy sharing, processes subscription status via Telegram's getChatMember API, and stores data persistently in Postgres for auditing and management.

Ideal use cases: Marketing campaigns requiring channel subscriptions for lead gating, exclusive content distribution, affiliate programs with subscription proofs, or community management tools. Customize by modifying the SQL schema, toggling Google Drive delivery, or integrating additional rewards like API calls or emails.