This template helps you manage your calendars by enriching each calendar event with data from Perplexity, OpenWeatherMap, & Open AI, and sending notifications on your Telegram.

🤖 Smart Calendar Agent: Enrich Calendar Events with AI Analysis using OpenAI, Perplexity & Weather Data

Problem

😤 Calendar management is a NIGHTMARE.

I waste hours manually checking weather, researching restaurants, remembering flight details, and missing important prep work for events—scattered, reactive, exhausting.

I wish calendars were actually SMART and would automatically prepare me for every event!

If only I could just add:
"Flight DL123 tomorrow at 9 AM from SFO to JFK"
and instantly get terminal info, check-in reminders, weather updates, and travel tips delivered right to my phone.

Introducing Smart Calendar Agent, an automated agentic workflow powered by n8n that turns your calendar into a proactive AI assistant.

Prerequisites

Required accounts/API keys for Google Calendar, OpenAI, OpenWeatherMap, Perplexity, and Telegram.

This would be helpful for:

🎯 Busy Professionals: Never miss important event prep again
🎯 Frequent Travelers: Get flight details, weather updates, and travel tips automatically
🎯 Event Planners: Stay ahead of weather changes and venue details
🎯 Anyone: Transform reactive calendar checking into proactive event intelligence

Step-by-step workflow:

Takes 10-15 minutes to setup.

1. Schedule Trigger runs daily at 8 AM to scan your calendar
2. Smart Calendar Agent analyzes each event and classifies type (flight, meeting, outdoor activity, etc.)
3. Contextual Intelligence automatically executes relevant actions:
   • Flights: Fetches terminal info, boarding gates, check-in procedures
   • Weather-sensitive events: Gets weather forecasts and clothing suggestions
   • Restaurant reservations: Gathers reviews and insights via Perplexity
   • Back-to-back meetings: Detects scheduling conflicts and suggests fixes
   • Travel bookings: Provides packing suggestions based on destination weather
4. Google Calendar integration reads your events and context
5. OpenWeatherMap provides weather forecasts for location-based events
6. Perplexity AI researches venues, reviews, and travel requirements
7. Telegram notifications deliver perfectly timed, actionable insights to your phone

Sample Query

Input: Calendar Event - "Flight DL123 tomorrow at 9 AM from SFO to JFK"

Output: Telegram notification - "✈️ Make sure to carry your REAL ID and boarding pass. The flight will depart from Terminal 2, Boarding Gate 1. Traffic to SFO: 45 mins from your location."

The system automatically sends contextual reminders 24 hours before flights, weather updates the night before outdoor events, and conflict alerts 30 minutes before back-to-back meetings.

Never be caught unprepared again—your calendar just got a brain! 🧠

Customizations

The Smart Calendar Agent is modular — you can mix and match services to fit your tech stack, region, and preferences. Here’s how you can customize each part of the workflow:

🔄 Replace Perplexity AI with Your Preferred AI Search Tool

If you don’t have access to Perplexity’s API or prefer another tool, swap it out easily:

Claude AI (Anthropic)

Use Claude for deeper, context-aware responses.

Replace the Perplexity HTTP Request node with an Anthropic-compatible OpenAI node using claude-3-opus or similar via https://api.anthropic.com.

Gemini (Google)

Use Vertex AI or Gemini API to generate summaries or travel tips.

Custom Web Scraper + GPT-4

Scrape restaurant/event URLs and feed scraped data to GPT for summarization.

Example:
Instead of Perplexity suggesting restaurant reviews, use Claude to analyze Google Maps reviews and suggest the top 3 things to try.

📆 Replace Google Calendar with Another Calendar Provider

Use a different calendar tool by adjusting your data source:

Microsoft Outlook Calendar

Use n8n’s Microsoft Graph integration.

Requires Azure App registration and Calendars.Read scope.

Notion Calendar (via Notion API)

Pull event data from a Notion table that acts like a calendar.

CSV or Google Sheets Input

Parse a CSV or Sheet that stores event information and act on that.

Example:
Use Outlook Calendar to pull events for the day, fetch weather via OpenWeatherMap, and message you on Slack.

📲 Replace Telegram with Other Notification Platforms

You can notify yourself through your preferred messaging app:

✅ WhatsApp (via Twilio or Ultramsg)
Use n8n’s HTTP Request node to call Twilio API for WhatsApp.

Send templated messages including time, location, and action items.

✅ Slack
Use Slack’s Webhook URL or Slack Node in n8n.

Great for team-wide prep messages or workspace reminders.

✅ Discord
Use a Discord Webhook to post prep summaries into a private server or DM.

✅ Email
Use the Email node in n8n to send daily summaries to your inbox.

Example:
Instead of sending alerts on Telegram, send a beautifully formatted Slack message 30 minutes before a flight.

🌐 Enhance with Other External Data Sources

Go beyond weather and flights:

FlightAware API: For accurate flight status updates, delays, and gate changes

Google Maps API: Estimate travel time to event location + suggest departure time

Eventbrite or Ticketmaster API: Fetch event entry rules, artist lineup, or parking info

ChatGPT Plugins (via Browser automation or 3rd-party wrappers): Fetch contextual insights from anywhere online

Example:
If your event is an outdoor concert, fetch artist bios via Ticketmaster, weather updates from OpenWeather, and Uber travel estimates from Google Maps API.

🧠 Personalize the AI Prompts for Your Needs

Customize the way OpenAI responds:

Add your name, preferences, or tone of voice in the system prompt

Tell it your travel habits, favorite cuisines, or packing preferences

Prompt Example:
“I’m a vegan traveler with asthma — summarize how I should prepare for this flight from NYC to Delhi and what the AQI is expected to be.”.

Setup Instructions

Here are step-by-step setup instructions for integrating each of the requested services in n8n:

1. Google Calendar Integration

A. Set up Google Calendar Credentials

Go to n8n, open the Credentials section.

Add new credentials for Google (OAuth2).

Follow the instructions to create a Google Cloud project and OAuth2 credentials:

Go to the Google Cloud Console.

Create a new project.

Enable the Google Calendar API.

Go to "APIs & Services" -> "Credentials"
-> "Create Credentials" -> "OAuth client ID".

Set the redirect URI to your n8n instance

Copy the Client ID and Client Secret into n8n.

Authenticate and save.

B. Add Google Calendar Node

In your workflow, click "Add node" and search for "Google Calendar".

Select the operation you need (e.g., Create Event, Get Events, Update Event).

Select your Google Calendar credentials.

Fill in the required fields (e.g., calendar ID, event details).

Execute the node to test.

2. OpenAI Integration

A. Set up OpenAI Credentials

Go to n8n, open the Credentials section.
Add new credentials for OpenAI.
Enter your OpenAI API key (get it from your OpenAI account).
Save the credentials.

B. Add OpenAI Node

In your workflow, click "Add node" and search for "OpenAI".

Choose the operation (e.g., Message a Model, Message an Assistant).

Select your OpenAI credentials.

Enter the prompt or parameters as needed.(already in the JSON)

Execute the node to test.

3. OpenWeatherMap Integration

A. Set up OpenWeatherMap Credentials

Sign up at OpenWeatherMap and verify your email.

Get your API key from your account dashboard (API Keys page).

In n8n, go to Credentials and add new OpenWeatherMap credentials.

Paste your API key and save.

B. Add OpenWeatherMap Node

In your workflow, click "Add node" and search for "OpenWeatherMap".

Select the operation (e.g., Get Current Weather, Get 5 Day Forecast).

Select your OpenWeatherMap credentials.

Enter the required parameters (e.g., city name, coordinates).

Execute the node to test.

4. Perplexity Integration

A. Set up Perplexity Credentials

Create a Perplexity account.

Generate an API key following the Perplexity API getting started guide.

In n8n, go to Credentials and add new Perplexity credentials.

Paste your API key and save.

B. Add Perplexity Node

In your workflow, click "Add node" and search for "Perplexity".

Select the operation (e.g., Message a Model).

Select your Perplexity credentials.

Enter the prompt or parameters as needed. (present in the JSON)

Execute the node to test.

5. Telegram Integration

A. Set up Telegram Credentials

Create a Telegram bot using BotFather in the Telegram app.

Copy the name token provided by BotFather (search for it on the Telegram app).

Create credentials on the Telegram Website.

In n8n, go to Credentials and add new Telegram credentials.

Paste your bot token and save.

B. Add Telegram Node

In your workflow, click "Add node" and search for "Telegram".

Select the operation (e.g., Send Message, Get Updates).

Select your Telegram credentials.

Enter the required parameters (e.g., chat ID, message text).

Execute the node to test.