📇 MCP Google Contacts Server

A Machine Conversation Protocol (MCP) server that provides comprehensive Google Contacts functionality for AI assistants.

✨ Features

• Complete Contact Management: Create, read, update, and delete contacts with 25+ fields
• Advanced Search: Multi-field search across names, emails, phones, and organizations
• Contact Groups: Full label/group management and organization
• Google Workspace Integration: Directory search and user management
• Efficient Performance: Pagination support for large contact lists (1000+ contacts)
• Rich Field Support: Multiple emails/phones, addresses, birthdays, relationships, custom fields

🚀 Installation

Prerequisites

• Python 3.12 or higher
• Google account with contacts access
• Google Cloud project with People API enabled
• OAuth 2.0 credentials

Setup

1. Clone and install:

   git clone git@github.com:4tal/mcp-google-contacts-server.git
   cd mcp-google-contacts-server
   
   # Using uv (recommended)
   uv venv && source .venv/bin/activate
   uv pip install -r requirements.txt
   
   # Or using pip
   pip install -r requirements.txt
   

2. Set up Google API credentials (choose one):

   Option A: Credentials file

   • Download credentials.json from Google Cloud Console
   • Place in project root or specify with --credentials-file

   Option B: Environment variables

   export GOOGLE_CLIENT_ID="your_client_id"
   export GOOGLE_CLIENT_SECRET="your_client_secret"
   export GOOGLE_REFRESH_TOKEN="your_refresh_token"
   

🛠️ Usage

Basic Startup

python src/main.py
# or
uv run src/main.py

Command Line Options

• --transport: Protocol (stdio or http, default: stdio)
• --host: HTTP host (default: localhost)
• --port: HTTP port (default: 8000)
• --credentials-file: Path to credentials.json
• --client-id, --client-secret, --refresh-token: OAuth credentials

Examples

# HTTP transport
python src/main.py --transport http --port 8080

# Specific credentials file
python src/main.py --credentials-file /path/to/credentials.json

🔌 MCP Client Integration

Add to your MCP configuration:

{
  "mcpServers": {
    "google-contacts-server": {
      "command": "uv",
      "args": [
        "--directory", "/path/to/mcp-google-contacts-server",
        "run", "main.py"
      ]
    }
  }
}

🧰 Available Tools

Contact Management

• list_contacts - List all contacts with filtering and pagination
• search_contacts - Advanced multi-field search
• get_contact - Get detailed contact information
• create_contact - Create contact with basic fields (11 fields)
• create_contact_advanced - Create contact with all fields (25+ fields)
• update_contact - Update contact with basic fields
• update_contact_advanced - Update contact with all fields
• delete_contact - Delete a contact

Contact Groups (Labels)

• list_contact_groups - List all contact groups/labels
• create_contact_group - Create new contact group
• get_contact_group - Get group details and members
• update_contact_group - Update group name
• delete_contact_group - Delete user-created groups
• add_contacts_to_group - Add contacts to a group
• remove_contacts_from_group - Remove contacts from group
• search_contacts_by_group - Find contacts in specific group

Google Workspace

• list_workspace_users - List organization directory
• search_directory - Search workspace directory
• get_other_contacts - Get "other contacts"

📝 Quick Examples

Search Contacts

# Basic search
search_contacts("john smith")

# Search specific fields
search_contacts("engineer", search_fields=["jobTitle", "organization"])

# Search phone numbers
search_contacts("+1234567890")

Create Contact

# Basic contact
create_contact(
    given_name="John",
    family_name="Smith",
    email="john@example.com",
    phone="+1-555-123-4567",
    organization="Acme Corp",
    job_title="Software Engineer"
)

# Advanced contact with multiple fields
create_contact_advanced({
    "given_name": "Jane",
    "family_name": "Doe",
    "emails": [
        {"value": "jane@work.com", "type": "work"},
        {"value": "jane@personal.com", "type": "home"}
    ],
    "phones": [
        {"value": "+1-555-111-2222", "type": "mobile"}
    ],
    "organization": "Tech Corp",
    "birthday": "1985-03-22"
})

Manage Contact Groups

# Create group
create_contact_group("Work Team")

# Add contacts to group
add_contacts_to_group("contactGroups/12345", ["people/67890", "people/11111"])

# Find contacts in group
search_contacts_by_group("contactGroups/12345")

❓ Troubleshooting

Authentication Issues

• Ensure People API is enabled in Google Cloud Console
• Check OAuth credentials are valid and have proper scopes
• Required scopes: contacts and directory.readonly

Search Not Working

• Use server-side search with search_contacts
• Try different search terms or fields

Performance Issues

• Use pagination with max_results parameter
• Set include_all_fields=False for faster queries

🔧 Development

# Development setup
uv sync --dev

# Format code
./scripts/format.sh

# Run linting
./scripts/lint.sh

# Test
uv run python test_contact_groups.py

📄 License

MIT License - see LICENSE file for details.

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Note: This server provides comprehensive Google Contacts functionality with support for all contact fields, advanced search, contact groups, and efficient handling of large contact lists.