Reminder MCP Server

A MCP server for scheduling and triggering reminders via Slack or Telegram.

Reminders are delivered even if your server is not running.

This is possible because reminders are scheduled and triggered by an external service (cron-job.org), which will send the notification to Slack or Telegram at the scheduled time, regardless of your server's status.

Configuration

{
  "mcpServers": {
    "reminder": {
      "command": "npx",
      "args": ["-y", "reminder-mcp"],
      "env": {
        "CRON_JOB_API_KEY": "your_api_key",
        "NOTIFICATION_PLATFORM": "slack",
        "SLACK_WEBHOOK_URL": "https://hooks.slack.com/services/xxxxxxx",
        "TELEGRAM_BOT_TOKEN": "",
        "TELEGRAM_CHAT_ID": ""
      }
    }
  }
}

Environment Variables

Name	Description
CRON_JOB_API_KEY	API key from cron-job.org
NOTIFICATION_PLATFORM	slack or telegram
SLACK_WEBHOOK_URL	(Slack only) Webhook URL for your channel
TELEGRAM_BOT_TOKEN	(Telegram only) Bot token from @BotFather
TELEGRAM_CHAT_ID	(Telegram only) Chat ID for your group/user

Usage Examples

You can use natural language instructions with an LLM. Here are some examples:

• Remind me to call Alice in 5 minutes.
• Remind me to make a doctor appointment at 3:00 PM tomorrow.
• List all my reminders.
• Delete the reminder titled "Call Alice".

Note: Reminders are required to be set at least 2 minutes ahead of time.

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How to Get Your Credentials

Cron Job API Key

• Register at cron-job.org and generate an API key.

Slack Webhook URL

1. Go to Slack Apps.
2. Create or select an app.
3. Add the 'Incoming Webhooks' feature.
4. Activate and create a webhook URL for your channel.
5. Set SLACK_WEBHOOK_URL in the configuration env.

Telegram Bot Token & Chat ID

1. Create a bot with @BotFather.
2. Add your bot to your group or message it directly.
3. Get your chat ID via the Telegram API: https://api.telegram.org/bot<YOUR_BOT_TOKEN>/getUpdates.
4. Set TELEGRAM_BOT_TOKEN and TELEGRAM_CHAT_ID in the configuration env.