How do I install Proton Mail (unofficial)?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is Proton Mail (unofficial) official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 26 (Limited). The formula is published on the methodology page.

MCPpedia

Proton Mail (unofficial) MCP Server | MCPpedia

Proton Mail (unofficial) MCP Server

Name: Proton Mail (unofficial) MCP Server
Author: sethbang

Unofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP

Tools Versions Alternatives

Registrysethbang

26Limited

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "sethbang-proton-mail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "proton-mail-mcp@1.0.2"
      ],
      "env": {
        "PROTONMAIL_USERNAME": "",
        "PROTONMAIL_PASSWORD": "YOUR_PROTONMAIL_PASSWORD",
        "PROTONMAIL_HOST": "smtp.protonmail.ch",
        "PROTONMAIL_PORT": "587",
        "PROTONMAIL_SECURE": "false",
        "IMAP_HOST": "127.0.0.1",
        "IMAP_PORT": "1143",
        "IMAP_SECURE": "false",
        "IMAP_USERNAME": "",
        "IMAP_PASSWORD": "YOUR_IMAP_PASSWORD",
        "READONLY": "false",
        "RESTRICT_OUTBOUND_TO_SELF": "false",
        "ALLOW_FILE_DOWNLOAD_DIR": "",
        "ALLOW_EMPTY_FOLDER": "false",
        "DEBUG": "false"
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
PROTONMAIL_USERNAME	Yes	Your Proton Mail email address
PROTONMAIL_PASSWORD	Yes	Your Proton Mail SMTP password (not your login password; generate one in Proton settings) Secret.
PROTONMAIL_HOST	No	SMTP host
PROTONMAIL_PORT	No	SMTP port
PROTONMAIL_SECURE	No	Use TLS for SMTP (true for port 465)
IMAP_HOST	No	Proton Mail Bridge IMAP host (required for read/search tools)
IMAP_PORT	No	Proton Mail Bridge IMAP port
IMAP_SECURE	No	Use TLS for IMAP
IMAP_USERNAME	No	Proton Mail Bridge username (falls back to PROTONMAIL_USERNAME)
IMAP_PASSWORD	No	Proton Mail Bridge password (falls back to PROTONMAIL_PASSWORD) Secret.
READONLY	No	Disable all mutating tools (send, move, delete, flags, labels, bulk ops, folder/label management)
RESTRICT_OUTBOUND_TO_SELF	No	Refuse live sends to any recipient other than PROTONMAIL_USERNAME (for throwaway/QA accounts)
ALLOW_FILE_DOWNLOAD_DIR	No	Allowlist directory enabling download_attachment.saveTo; when unset, attachments return as inline base64
ALLOW_EMPTY_FOLDER	No	Register the empty_folder tool (not recommended)
DEBUG	No	Enable verbose logging to stderr

Proton Mail (unofficial) MCP Server

Install

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Environment

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