Multi-Channel Event Countdown Manager with Telegram, Slack and Email

This n8n workflow automates the creation and countdown notifications for events like product launches or birthdays via a Telegram bot, ensuring timely group alerts through multi-channel routing (e.g., Slack or email). It processes incoming event data from webhooks, stores it persistently, and triggers scheduled reminders to keep teams or groups informed.

Key Features Handles event creation or updates via webhook from Telegram chats or external sources. Fetches and processes upcoming events on a customizable schedule for countdown notifications. Routes alerts dynamically to channels like Slack or email based on event settings. Validates incoming data, formats messages for optimal delivery, and confirms responses to initiators.

Workflow Process The Webhook Trigger node starts the workflow when an external system (e.g., Telegram bot) sends a POST request with event details like date, description, and notification preferences. The Process Webhook Event node parses and validates incoming webhook data, ensuring required fields (e.g., event date, channel) are present before proceeding. The Events Database node fetches upcoming events (e.g., launches or birthdays) from a data source, either triggered by the webhook for updates or scheduled for notifications. The Webhook Response node sends a confirmation or status response back to the webhook sender (e.g., Telegram bot) in JSON format. The Schedule Trigger node runs the workflow automatically on a defined schedule (e.g., daily at 9AM) to check for countdown-eligible events. The Is Slack? node checks if the event's notification channel is set to Slack; if true, it routes to Slack-specific formatting. The Format Slack Message node formats the event countdown message in a Slack-friendly layout (e.g., with mentions or embeds). The Send to Slack node sends the formatted message to the target Slack channel for group notifications. The Is Email? node checks if the event's notification channel is set to email (fallback from Slack check); if true, it routes to email-specific formatting. The Format Email node formats the event countdown message in an email-friendly detail (e.g., with HTML for readability). The Send Email node sends the formatted email to the recipient list (e.g., group organizers or participants).

Setup Instructions Import the workflow into n8n and configure the Webhook Trigger with your Telegram bot's webhook URL for event creation requests. Set up database credentials in the Events Database node (e.g., connect to PostgreSQL or Airtable for event storage). Configure channel integrations: Slack app token for Send to Slack, SMTP credentials for Send Email, and ensure Schedule Trigger aligns with your countdown frequency (e.g., hourly for real-time alerts). Test by sending a sample POST request to the webhook with event data and manually triggering the schedule to verify notifications. Monitor executions in the n8n dashboard and refine validation logic in Process Webhook Event for custom event fields.

Prerequisites Telegram bot with webhook setup for incoming event creation messages. Database service (e.g., PostgreSQL or Google Sheets) for storing and querying events. Slack workspace and email provider (e.g., Gmail SMTP) for notifications. n8n instance with webhook and cron scheduling enabled. Basic API setup for Telegram bot token and channel routing.

Modification Options Add a Telegram-specific check node (e.g., "Is Telegram?") branching from Events Database to integrate direct bot messaging. Customize the Schedule Trigger for dynamic timing, like event-specific intervals for countdowns (e.g., daily leading up to the date). Extend Format Slack Message or Format Email with dynamic templates, such as embedding countdown timers or images. Integrate additional channels (e.g., Discord) by duplicating the Is Slack? / Is Email? logic. Enhance Process Webhook Event to support recurring events or auto-populate recipient lists from Telegram group data.

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