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Allow AI systems to list, search, and manage contacts via Google Contacts.
About
Allow AI systems to list, search, and manage contacts via Google Contacts.
Security Report
This Google Contacts MCP server implements OAuth 2.0 delegation appropriately with proper authentication and authorization checks. The architecture acts as a stateless OAuth proxy to Google, minimizing token storage risk. Code quality is solid with input validation via Zod schemas and appropriate permissions scoping. A few minor code quality observations exist around error handling and token validation logging, but do not represent security vulnerabilities. Supply chain analysis found 6 known vulnerabilities in dependencies (2 critical, 2 high severity). Package verification found 1 issue.
7 files analyzed · 12 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: GOOGLE_ACCESS_TOKEN
Environment variable: MCP_TRANSPORT
Environment variable: GOOGLE_CLIENT_ID
Environment variable: GOOGLE_CLIENT_SECRET
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-domdomegg-google-contacts-mcp": {
"env": {
"MCP_TRANSPORT": "your-mcp-transport-here",
"GOOGLE_CLIENT_ID": "your-google-client-id-here",
"GOOGLE_ACCESS_TOKEN": "your-google-access-token-here",
"GOOGLE_CLIENT_SECRET": "your-google-client-secret-here"
},
"args": [
"-y",
"google-contacts-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
google-contacts-mcp
MCP server for Google Contacts - list, search, and manage contacts.
Use Cases
Email lookup: "See the latest JIRA ticket that's come in. Can we email Sarah from the security team to get their input?" → finds Sarah's email and drafts the message.
Business card capture: After a networking event, snap photos of business cards → your assistant extracts the details and adds them as contacts with a note about where you met.
Find connections: "Who do I know at Google?" or "I'm visiting London next week - who should I catch up with?" → search your personal network.
Call reminder: "Remind me to call Mike at 3pm" → creates a calendar event with Mike's phone number attached so you can dial straight from the reminder.
Contact updates: You receive an out-of-office saying someone left their company with a new personal email → your assistant updates their contact automatically.
(These are just examples - any workflow that needs contact lookup or management can use this.)
Setup
1. Create Google OAuth credentials
- Go to Google Cloud Console
- Create a new project (or use existing)
- Enable the People API
- Go to APIs & Services → OAuth consent screen, set up consent screen
- Go to APIs & Services → Credentials → Create Credentials → OAuth client ID
- Choose Web application
- Add
http://localhost:3000/callbackto Authorized redirect URIs - Note your Client ID and Client Secret
2. Run the server
GOOGLE_CLIENT_ID='your-client-id' \
GOOGLE_CLIENT_SECRET='your-client-secret' \
MCP_TRANSPORT=http \
npm start
The server runs on http://localhost:3000 by default. Change with PORT=3001.
3. Add to your MCP client
With the server running, follow the instructions on install-mcp, which generates the right config for your MCP client (Claude Code, Claude Desktop, Cursor, Cline, VS Code, and more).
Architecture
This server acts as an OAuth proxy to Google:
graph LR
A[MCP client] <--> B[google-contacts-mcp] <--> C[Google OAuth/API]
- Server advertises itself as an OAuth authorization server via
/.well-known/oauth-authorization-server /registerreturns the Google OAuth client credentials/authorizeredirects to Google, encoding the client's callback URL in state/callbackreceives the code from Google and forwards to the client's callback/tokenproxies token requests to Google, injecting client credentials/mcphandles MCP requests, using the bearer token to call People API
The server holds no tokens or state - it just proxies OAuth to Google.
Tools
| Tool | Description |
|---|---|
contacts_list | List contacts with names, emails, phones, organizations, birthdays, events, URLs, addresses, nicknames, relations, IM usernames, genders, external IDs, client data, and custom fields |
contacts_search | Search contacts by name, email, or phone |
directory_search | Search organization directory for coworkers |
contact_get | Get detailed info for a single contact |
contact_create | Create a new contact |
contact_update | Update an existing contact |
contact_delete | Permanently delete a contact |
contact_photo_update | Set or replace a contact's photo |
contact_photo_delete | Remove a contact's photo |
contact_groups_list | List contact groups (labels) |
contact_group_get | Get a contact group, including its members |
contact_group_create | Create a new contact group |
contact_group_update | Rename a contact group |
contact_group_delete | Permanently delete a contact group |
contact_group_members_modify | Add or remove contacts from a contact group |
Contributing
Pull requests are welcomed on GitHub! To get started:
- Install Git and Node.js
- Clone the repository
- Install dependencies with
npm install - Run
npm run testto run tests - Build with
npm run build
Releases
Versions follow the semantic versioning spec.
To release:
- Use
npm version <major | minor | patch>to bump the version - Run
git push --follow-tagsto push with tags - Wait for GitHub Actions to publish to the NPM registry.
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