A full-stack web application that enables users to log in with Google, authorize access to their Google Calendar, and receive phone call reminders for upcoming events via Twilio.

• Frontend: Next.js
• Backend: Node.js (Express)
• Authentication: Google OAuth 2.0
• APIs: Google Calendar API, Twilio Voice API
• Package Manager: pnpm

/project-root
├── frontend/                # Next.js application
├── backend/                 # Node.js backend
├── README.md

• Node.js ≥ 18.x
• pnpm ≥ 8.x
• Google Cloud Project (OAuth + Calendar API enabled)
• Twilio account with verified number

git clone https://github.com/your-username/google-calendar-twilio.git
cd google-calendar-twilio

pnpm install --filter ./frontend
pnpm install --filter ./backend

NEXT_PUBLIC_GOOGLE_CLIENT_ID=
NEXT_PUBLIC_GOOGLE_CLIENT_SECRET=
NEXT_PUBLIC_GOOGLE_CALLBACK_URL=
NEXT_PUBLIC_SECRET_KEY=

Create this file inside /frontend directory.

GOOGLE_CLIENT_ID=
GOOGLE_CLIENT_SECRET=
SESSION_SECRET=
PORT=
MONGO_URI=
JWT_SECRET=
TWILIO_ACCOUNT_SID=
TWILIO_AUTH_TOKEN=
TWILIO_PHONE_NUMBER=

Create this file inside /backend directory.

cd frontend
pnpm dev

Visit: http://localhost:3000

cd backend
pnpm dev

Backend runs at: http://localhost:5000

• Backend runs a scheduled check (default: every 5 minutes).
• If an event is found within the next 5 minutes, a phone call is triggered via Twilio.

Ensure the backend is running continuously to enable this feature.

• Make sure redirect URIs are consistent across .env and Google Console.
• Twilio trial accounts only allow calls to verified phone numbers.
• Use ngrok for local backend testing with external access if needed.

Name: Vijin Vinod