ProtonMail MCP Server

An MCP (Model Context Protocol) server that connects to ProtonMail via Bridge, enabling AI assistants like Claude to manage your email.

Features

• Email Management: Read, search, send, reply, forward, and delete emails
• Folder Management: List, create, rename, and delete folders
• Label Management: Apply and remove labels from emails
• Trend Analysis: Analyze email patterns, identify important emails, track sender statistics

Requirements

• Node.js >= 18
• ProtonMail Bridge installed and running
• ProtonMail account (Plus, Unlimited, or Business)

Installation

git clone https://github.com/robotben/protonmail-mcp.git
cd protonmail-mcp
npm install
npm run build

Configuration

1. Copy the example config:

   cp config/protonmail.config.example.json config/protonmail.config.json
   

2. Edit config/protonmail.config.json with your credentials:

   {
     "protonmail": {
       "auth": {
         "user": "your-email@protonmail.com",
         "pass": "your-bridge-password"
       }
     }
   }
   

   Note: Use the Bridge password from ProtonMail Bridge app (not your account password).

Running the Server

npm start

The server listens on port 3000 by default. Set the PORT environment variable to change it:

PORT=8080 npm start

MCP endpoint: http://localhost:3000/mcp

Usage with Claude Desktop

The server uses the MCP Streamable HTTP transport (spec 2025-03-26), so configure Claude Desktop with a URL instead of a command:

{
  "mcpServers": {
    "protonmail": {
      "url": "http://localhost:3000/mcp"
    }
  }
}

Note: Start the server before launching Claude Desktop (npm start).

Legacy stdio (not supported)

This server no longer supports stdio transport. If you need stdio, use an earlier version.

Available Tools (22)

Email Reading

Tool	Description
list_emails	List emails from a folder with pagination
get_email	Get full email content by UID
get_email_headers	Get email headers only (lightweight)
search_emails	Search emails with query, date range, filters
get_unread_count	Get unread count for folders
mark_as_read	Mark emails as read
mark_as_unread	Mark emails as unread

Email Sending

Tool	Description
send_email	Send a new email
reply_to_email	Reply to an email
forward_email	Forward an email

Folder Management

Tool	Description
list_folders	List all folders
create_folder	Create a new folder
delete_folder	Delete a folder
rename_folder	Rename a folder
move_emails	Move emails between folders

Label Management

Tool	Description
list_labels	List all labels
create_label	Create a new label
apply_labels	Apply labels to emails
remove_labels	Remove labels from emails

Analytics

Tool	Description
analyze_email_trends	Analyze email patterns over time
analyze_label_distribution	Analyze email distribution across folders
identify_important_emails	Find important emails based on criteria

Utility

Tool	Description
delete_emails	Permanently delete emails

Resources

URI	Description
protonmail://inbox/summary	Inbox statistics
protonmail://folders	Folder list with counts
protonmail://labels	Label summary
protonmail://recent	Recent 24h activity
protonmail://stats	Email analytics

Development

# Build
npm run build

# Watch mode
npm run dev

# Run directly with tsx
npx tsx src/server.ts

License

MIT