Enables AI assistants to manage Gmail through natural language interactions, including sending emails, reading messages, searching emails, managing labels, and handling attachments via the Gmail API with OAuth2 authentication.
Requires Google Cloud Project setup to obtain OAuth credentials for Gmail API access. Users must create a project in Google Cloud Console and enable the Gmail API.
Gmail AutoAuth MCP Server
A Model Context Protocol (MCP) server for Gmail integration in Claude Desktop with auto authentication support. This server enables AI assistants to manage Gmail through natural language interactions.
Features
Send emails with subject, content, attachments, and recipients
Support for HTML emails and multipart messages with both HTML and plain text versions
Full support for international characters in subject lines and email content
Read email messages by ID with advanced MIME structure handling
View email attachments information (filenames, types, sizes)
Search emails with various criteria (subject, sender, date range)
Comprehensive label management with ability to create, update, delete and list labels
List all available Gmail labels (system and user-defined)
List emails in inbox, sent, or custom labels
Mark emails as read/unread
Move emails to different labels/folders
Delete emails
Batch operations for efficiently processing multiple emails at once
Full integration with Gmail API
Simple OAuth2 authentication flow with auto browser launch
Support for both Desktop and Web application credentials
Global credential storage for convenience
Installation & Authentication
Installing via Smithery
To install Gmail AutoAuth for Claude Desktop automatically via Smithery:
Installing Manually
Create a Google Cloud Project and obtain credentials:
a. Create a Google Cloud Project:
Go to Google Cloud Console
Create a new project or select an existing one
Enable the Gmail API for your project
b. Create OAuth 2.0 Credentials:
Go to "APIs & Services" > "Credentials"
Click "Create Credentials" > "OAuth client ID"
Choose either "Desktop app" or "Web application" as application type
Give it a name and click "Create"
For Web application, add
http://localhost:3000/oauth2callback
to the authorized redirect URIsDownload the JSON file of your client's OAuth keys
Rename the key file to
gcp-oauth.keys.json
Run Authentication:
You can authenticate in two ways:
a. Global Authentication (Recommended):
# First time: Place gcp-oauth.keys.json in your home directory's .gmail-mcp folder mkdir -p ~/.gmail-mcp mv gcp-oauth.keys.json ~/.gmail-mcp/ # Run authentication from anywhere npx @gongrzhe/server-gmail-autoauth-mcp authb. Local Authentication:
# Place gcp-oauth.keys.json in your current directory # The file will be automatically copied to global config npx @gongrzhe/server-gmail-autoauth-mcp authThe authentication process will:
Look for
gcp-oauth.keys.json
in the current directory or~/.gmail-mcp/
If found in current directory, copy it to
~/.gmail-mcp/
Open your default browser for Google authentication
Save credentials as
~/.gmail-mcp/credentials.json
Note:
After successful authentication, credentials are stored globally in
~/.gmail-mcp/
and can be used from any directoryBoth Desktop app and Web application credentials are supported
For Web application credentials, make sure to add
http://localhost:3000/oauth2callback
to your authorized redirect URIs
Configure in Claude Desktop:
Docker Support
If you prefer using Docker:
Authentication:
Usage:
Cloud Server Authentication
For cloud server environments (like n8n), you can specify a custom callback URL during authentication:
Setup Instructions for Cloud Environment
Configure Reverse Proxy:
Set up your n8n container to expose a port for authentication
Configure a reverse proxy to forward traffic from your domain (e.g.,
gmail.gongrzhe.com
) to this port
DNS Configuration:
Add an A record in your DNS settings to resolve your domain to your cloud server's IP address
Google Cloud Platform Setup:
In your Google Cloud Console, add your custom domain callback URL (e.g.,
https://gmail.gongrzhe.com/oauth2callback
) to the authorized redirect URIs list
Run Authentication:
npx @gongrzhe/server-gmail-autoauth-mcp auth https://gmail.gongrzhe.com/oauth2callbackConfigure in your application:
{ "mcpServers": { "gmail": { "command": "npx", "args": [ "@gongrzhe/server-gmail-autoauth-mcp" ] } } }
This approach allows authentication flows to work properly in environments where localhost isn't accessible, such as containerized applications or cloud servers.
Available Tools
The server provides the following tools that can be used through Claude Desktop:
1. Send Email (send_email
)
Sends a new email immediately. Supports plain text, HTML, or multipart emails.
HTML Email Example:
Multipart Email Example (HTML + Plain Text):
2. Draft Email (draft_email
)
Creates a draft email without sending it.
3. Read Email (read_email
)
Retrieves the content of a specific email by its ID.
4. Search Emails (search_emails
)
Searches for emails using Gmail search syntax.
5. Modify Email (modify_email
)
Adds or removes labels from emails (move to different folders, archive, etc.).
6. Delete Email (delete_email
)
Permanently deletes an email.
7. List Email Labels (list_email_labels
)
Retrieves all available Gmail labels.
8. Create Label (create_label
)
Creates a new Gmail label.
9. Update Label (update_label
)
Updates an existing Gmail label.
10. Delete Label (delete_label
)
Deletes a Gmail label.
11. Get or Create Label (get_or_create_label
)
Gets an existing label by name or creates it if it doesn't exist.
12. Batch Modify Emails (batch_modify_emails
)
Modifies labels for multiple emails in efficient batches.
13. Batch Delete Emails (batch_delete_emails
)
Permanently deletes multiple emails in efficient batches.
Advanced Search Syntax
The search_emails
tool supports Gmail's powerful search operators:
Operator | Example | Description |
|
| Emails from a specific sender |
|
| Emails sent to a specific recipient |
|
| Emails with specific text in the subject |
|
| Emails with attachments |
|
| Emails received after a date |
|
| Emails received before a date |
|
| Emails with a specific state |
|
| Emails with a specific label |
You can combine multiple operators: from:john@example.com after:2024/01/01 has:attachment
Advanced Features
Email Content Extraction
The server intelligently extracts email content from complex MIME structures:
Prioritizes plain text content when available
Falls back to HTML content if plain text is not available
Handles multi-part MIME messages with nested parts
Processes attachments information (filename, type, size)
Preserves original email headers (From, To, Subject, Date)
International Character Support
The server fully supports non-ASCII characters in email subjects and content, including:
Turkish, Chinese, Japanese, Korean, and other non-Latin alphabets
Special characters and symbols
Proper encoding ensures correct display in email clients
Comprehensive Label Management
The server provides a complete set of tools for managing Gmail labels:
Create Labels: Create new labels with customizable visibility settings
Update Labels: Rename labels or change their visibility settings
Delete Labels: Remove user-created labels (system labels are protected)
Find or Create: Get a label by name or automatically create it if not found
List All Labels: View all system and user labels with detailed information
Label Visibility Options: Control how labels appear in message and label lists
Label visibility settings include:
messageListVisibility
: Controls whether the label appears in the message list (show
orhide
)labelListVisibility
: Controls how the label appears in the label list (labelShow
,labelShowIfUnread
, orlabelHide
)
These label management features enable sophisticated organization of emails directly through Claude, without needing to switch to the Gmail interface.
Batch Operations
The server includes efficient batch processing capabilities:
Process up to 50 emails at once (configurable batch size)
Automatic chunking of large email sets to avoid API limits
Detailed success/failure reporting for each operation
Graceful error handling with individual retries
Perfect for bulk inbox management and organization tasks
Security Notes
OAuth credentials are stored securely in your local environment (
~/.gmail-mcp/
)The server uses offline access to maintain persistent authentication
Never share or commit your credentials to version control
Regularly review and revoke unused access in your Google Account settings
Credentials are stored globally but are only accessible by the current user
Troubleshooting
OAuth Keys Not Found
Make sure
gcp-oauth.keys.json
is in either your current directory or~/.gmail-mcp/
Check file permissions
Invalid Credentials Format
Ensure your OAuth keys file contains either
web
orinstalled
credentialsFor web applications, verify the redirect URI is correctly configured
Port Already in Use
If port 3000 is already in use, please free it up before running authentication
You can find and stop the process using that port
Batch Operation Failures
If batch operations fail, they automatically retry individual items
Check the detailed error messages for specific failures
Consider reducing the batch size if you encounter rate limiting
Contributing
Contributions are welcome! Please feel free to submit a Pull Request.
Running evals
The evals package loads an mcp client that then runs the index.ts file, so there is no need to rebuild between tests. You can load environment variables by prefixing the npx command. Full documentation can be found here.
License
MIT
Support
If you encounter any issues or have questions, please file an issue on the GitHub repository.
This server cannot be installed
local-only server
The server can only run on the client's local machine because it depends on local resources.
Server for Gmail integration in Claude Desktop with auto authentication support. This server enables AI assistants to manage Gmail through natural language interactions.
- Features
- Installation & Authentication
- Available Tools
- 1. Send Email (send_email)
- 2. Draft Email (draft_email)
- 3. Read Email (read_email)
- 4. Search Emails (search_emails)
- 5. Modify Email (modify_email)
- 6. Delete Email (delete_email)
- 7. List Email Labels (list_email_labels)
- 8. Create Label (create_label)
- 9. Update Label (update_label)
- 10. Delete Label (delete_label)
- 11. Get or Create Label (get_or_create_label)
- 12. Batch Modify Emails (batch_modify_emails)
- 13. Batch Delete Emails (batch_delete_emails)
- Advanced Search Syntax
- Advanced Features
- Security Notes
- Troubleshooting
- Contributing
- Running evals
- License
- Support
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