Unofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP
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npx -y proton-mail-mcp{
"PROTONMAIL_USERNAME": "YOUR_VALUE_HERE",
"PROTONMAIL_PASSWORD": "YOUR_SECRET_VALUE",
"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": "YOUR_VALUE_HERE",
"IMAP_PASSWORD": "YOUR_SECRET_VALUE",
"READONLY": "false",
"RESTRICT_OUTBOUND_TO_SELF": "false",
"ALLOW_FILE_DOWNLOAD_DIR": "YOUR_VALUE_HERE",
"ALLOW_EMPTY_FOLDER": "false",
"DEBUG": "false"
}Add this server entry to the mcpServers object in your Claude Desktop config, then restart the app.
{
"mcpServers": {
"io-github-sethbang-proton-mail-mcp": {
"command": "npx",
"args": [
"-y",
"proton-mail-mcp"
],
"env": {
"PROTONMAIL_USERNAME": "YOUR_VALUE_HERE",
"PROTONMAIL_PASSWORD": "YOUR_SECRET_VALUE",
"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": "YOUR_VALUE_HERE",
"IMAP_PASSWORD": "YOUR_SECRET_VALUE",
"READONLY": "false",
"RESTRICT_OUTBOUND_TO_SELF": "false",
"ALLOW_FILE_DOWNLOAD_DIR": "YOUR_VALUE_HERE",
"ALLOW_EMPTY_FOLDER": "false",
"DEBUG": "false"
}
}
}
}~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.jsonNo remote HTTP endpoint is advertised. Use the package or stdio setup shown in Install.
Proton Mail (unofficial) is an MCP server for Unofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP. It supports STDIO transport.
Use the generated config in Install. This server runs with npx -y proton-mail-mcp; add any required environment variables before starting your client.
Choose the Claude Desktop tab in Install and copy the config for npx -y proton-mail-mcp. Add required environment variables before starting Claude Desktop.
Choose the Claude Code tab in Install and copy the config for npx -y proton-mail-mcp. Add required environment variables before starting Claude Code.
Choose the Codex tab in Install and copy the config for npx -y proton-mail-mcp. Add required environment variables before starting Codex.
Choose the Cursor or VS Code tab in Install and copy the config for npx -y proton-mail-mcp. Add required environment variables before starting Cursor or VS Code.
Proton Mail (unofficial) uses STDIO transport. Use the package or command config in Install.
Proton Mail (unofficial) inventory is listed when the MCP endpoint exposes tools, resources, or prompts. Some servers require auth first.
Proton Mail (unofficial) is marked with Auth required by registry metadata auth. You may need provider login, an API key, a bearer token, or a session header.
| Package | Registry | Version | Inputs |
|---|---|---|---|
proton-mail-mcpstdio | npm | 1.0.2 | Env: PROTONMAIL_USERNAME required Env: PROTONMAIL_PASSWORD required secret Env: PROTONMAIL_HOST Env: PROTONMAIL_PORT Env: PROTONMAIL_SECURE Env: IMAP_HOST Env: IMAP_PORT Env: IMAP_SECURE Env: IMAP_USERNAME Env: IMAP_PASSWORD secret Env: READONLY Env: RESTRICT_OUTBOUND_TO_SELF Env: ALLOW_FILE_DOWNLOAD_DIR Env: ALLOW_EMPTY_FOLDER Env: DEBUG |