Google Calendar Meeting Setup

Automation script for creating Google Calendar meeting invites with minimal input. The script authenticates via OAuth, then creates an event on your primary calendar using the Google Calendar API.

Demo Video

Watch the setup walkthrough on YouTube.

Prerequisites

• Python 3.11 (or use the provided Conda instructions).
• Google Cloud project with the Calendar API enabled.
• OAuth client credentials (credentials.json) downloaded to this folder.

Recommended Conda Environment

conda create -n meeting_setup python=3.11
conda activate meeting_setup
pip install google-api-python-client google-auth-httplib2 google-auth-oauthlib mcp

Obtain credentials.json

1. Visit the Google Cloud Console and sign in.
2. Create/select a project.
3. Enable Google Calendar API under APIs & Services → Library.
4. Configure the OAuth consent screen (External is fine for testing) and add the Google accounts that will run this script as test users.
5. Navigate to APIs & Services → Credentials and create an OAuth client ID of type Desktop app.
6. Download the client configuration JSON, rename it to credentials.json, and place it beside create_meeting_invite.py.
7. (First run only) When the script opens a browser window, approve access—token.json will be saved for subsequent runs.

Usage

python create_meeting_invite.py \
  --meeting-time "2025-11-09 17:00" \
  --other-email "karan.xyz@gmail.com" \
  --meeting-title "Karan <> Arjun | Intro call" \
  --meeting-notes "https://example.com/agenda"

• --meeting-time is required (IST timezone, format YYYY-MM-DD HH:MM or YYYY-MM-DDTHH:MM).
• --other-email is required.
• Optional flags:
  • --meeting-title (default: Meeting)
  • --host-email (default: arjuntheprogrammer@gmail.com)
  • --meeting-notes (default: empty)
  • --duration-minutes (default: 60)

The script prints the event details, including a link to view it in Google Calendar.

MCP Server

This project also exposes a Model Context Protocol (MCP) server so MCP-capable assistants can call the meeting tool directly.

conda activate meeting_setup
python mcp_server.py

The server currently runs over stdio transport. When connected, call the create_meeting_invite tool with the same argument names used by the CLI flags (e.g. meeting_time, other_email, meeting_title, meeting_notes, duration_minutes, host_email). The tool responds with key event details (summary, start, end, htmlLink, etc.).

Configure Codex to Use This MCP Server

1. Ensure the MCP environment is active (step above) and Codex CLI is installed.
2. Register the server once with Codex:

   codex mcp add calendar_meeting /Users/arjungupta/anaconda3/envs/meeting_setup/bin/python /Users/arjungupta/Development/extra/google_calendar_meeting_setup/mcp_server.py
   

3. Verify the registration:

   codex mcp list
   

   You should see calendar_meeting with transport stdio and the Python command.
4. Launch Codex normally (codex, codex exec, etc.). When Codex needs MCP tools it will start this server automatically.
5. Inside Codex, invoke the create_meeting_invite tool by supplying the same arguments as the CLI flags, for example:

   create_meeting_invite meeting_time="2025-11-16 16:00" other_email="partner@example.com" meeting_title="Strategy Sync"
   

Remove or reconfigure the server any time with codex mcp remove calendar_meeting.

Configure Claude Desktop

1. Launch Claude Desktop once so it generates claude_desktop_config.json at ~/Library/Application Support/Claude/.
2. Add (or merge) this entry inside the "mcpServers" object:

   {
     "calendar-meeting": {
       "command": "/Users/arjungupta/anaconda3/envs/meeting_setup/bin/python",
       "args": [
         "/Users/arjungupta/Development/extra/google_calendar_meeting_setup/mcp_server.py"
       ]
     }
   }
   

3. Restart Claude Desktop (or toggle MCP servers in its settings) so it picks up the new server. The create_meeting_invite tool is then available directly within Claude.