This MCP server allows Claude to interact with your Google Calendar, enabling capabilities like listing events, creating meetings, and finding free time slots.
https://www.googleapis.com/auth/calendar
https://www.googleapis.com/auth/calendar.events
getToken.js
:const { google } = require('googleapis');
const http = require('http');
const url = require('url');
// Replace these with your OAuth 2.0 credentials
const CLIENT_ID = 'your-client-id';
const CLIENT_SECRET = 'your-client-secret';
const REDIRECT_URI = 'http://localhost:3000/oauth2callback';
// Configure OAuth2 client
const oauth2Client = new google.auth.OAuth2(
CLIENT_ID,
CLIENT_SECRET,
REDIRECT_URI
);
// Define scopes
const scopes = [
'https://www.googleapis.com/auth/calendar',
'https://www.googleapis.com/auth/calendar.events'
];
async function getRefreshToken() {
return new Promise((resolve, reject) => {
try {
// Create server to handle OAuth callback
const server = http.createServer(async (req, res) => {
try {
const queryParams = url.parse(req.url, true).query;
if (queryParams.code) {
// Get tokens from code
const { tokens } = await oauth2Client.getToken(queryParams.code);
console.log('\n=================');
console.log('Refresh Token:', tokens.refresh_token);
console.log('=================\n');
console.log('Save this refresh token in your configuration!');
// Send success response
res.end('Authentication successful! You can close this window.');
// Close server
server.close();
resolve(tokens);
}
} catch (error) {
console.error('Error getting tokens:', error);
res.end('Authentication failed! Please check console for errors.');
reject(error);
}
}).listen(3000, () => {
// Generate auth url
const authUrl = oauth2Client.generateAuthUrl({
access_type: 'offline',
scope: scopes,
prompt: 'consent' // Force consent screen to ensure refresh token
});
console.log('1. Copy this URL and paste it in your browser:');
console.log('\n', authUrl, '\n');
console.log('2. Follow the Google authentication process');
console.log('3. Wait for the refresh token to appear here');
});
} catch (error) {
console.error('Server creation error:', error);
reject(error);
}
});
}
// Run the token retrieval
getRefreshToken().catch(console.error);
npm install googleapis
Update the script with your OAuth credentials:
your-client-id
with your actual client IDyour-client-secret
with your actual client secretRun the script:
node getToken.js
For MacOS:
code ~/Library/Application\ Support/Claude/claude_desktop_config.json
For Windows:
code %AppData%\Claude\claude_desktop_config.json
{
"mcpServers": {
"google-calendar": {
"command": "node",
"args": [
"/ABSOLUTE/PATH/TO/YOUR/build/index.js"
],
"env": {
"GOOGLE_CLIENT_ID": "your_client_id_here",
"GOOGLE_CLIENT_SECRET": "your_client_secret_here",
"GOOGLE_REDIRECT_URI": "http://localhost",
"GOOGLE_REFRESH_TOKEN": "your_refresh_token_here"
}
}
}
}
mkdir google-calendar-mcp
cd google-calendar-mcp
npm init -y
npm install @modelcontextprotocol/sdk googleapis google-auth-library zod
npm install -D @types/node typescript
{
"compilerOptions": {
"target": "ES2022",
"module": "Node16",
"moduleResolution": "Node16",
"outDir": "./build",
"rootDir": "./src",
"strict": true,
"esModuleInterop": true,
"skipLibCheck": true,
"forceConsistentCasingInFileNames": true
},
"include": ["src/**/*"],
"exclude": ["node_modules"]
}
{
"type": "module",
"scripts": {
"build": "tsc && node -e \"require('fs').chmodSync('build/index.js', '755')\""
}
}
mkdir src
GOOGLE_CLIENT_ID=your_client_id_here
GOOGLE_CLIENT_SECRET=your_client_secret_here
GOOGLE_REDIRECT_URI=http://localhost
GOOGLE_REFRESH_TOKEN=your_refresh_token_here
npm run build
The server provides the following tools:
list_events
: List calendar events within a specified time rangecreate_event
: Create a new calendar eventupdate_event
: Update an existing calendar eventdelete_event
: Delete a calendar eventfind_free_time
: Find available time slots in the calendarAfter setup, you can use commands like:
Tools not appearing in Claude:
tail -f ~/Library/Logs/Claude/mcp*.log
Authentication Errors:
Server Connection Issues:
node /path/to/build/index.js
To view server logs:
## For MacOS/Linux:
tail -n 20 -f ~/Library/Logs/Claude/mcp*.log
## For Windows:
Get-Content -Path "$env:AppData\Claude\Logs\mcp*.log" -Wait -Tail 20
If you’re getting environment variable errors, verify each one:
MIT License - See LICENSE file for details.
If you encounter any issues:
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