Proton Mail MCP via Bridge (IMAP/SMTP) · 13 tools · dual transport stdio + HTTP.
Connect Runs on your machine
claude mcp add proton-mail-mcp -e PROTON_BRIDGE_HOST=<PROTON_BRIDGE_HOST> -e PROTON_IMAP_PORT=<PROTON_IMAP_PORT> -e PROTON_SMTP_PORT=<PROTON_SMTP_PORT> -e PROTON_USERNAME=<PROTON_USERNAME> -e PROTON_PASSWORD=<PROTON_PASSWORD> -- npx -y @alexendros/[email protected]{
"mcpServers": {
"proton-mail-mcp": {
"command": "npx",
"args": [
"-y",
"@alexendros/[email protected]"
],
"env": {
"PROTON_BRIDGE_HOST": "<PROTON_BRIDGE_HOST>",
"PROTON_IMAP_PORT": "<PROTON_IMAP_PORT>",
"PROTON_SMTP_PORT": "<PROTON_SMTP_PORT>",
"PROTON_USERNAME": "<PROTON_USERNAME>",
"PROTON_PASSWORD": "<PROTON_PASSWORD>"
}
}
}
}{
"mcpServers": {
"proton-mail-mcp": {
"command": "npx",
"args": [
"-y",
"@alexendros/[email protected]"
],
"env": {
"PROTON_BRIDGE_HOST": "<PROTON_BRIDGE_HOST>",
"PROTON_IMAP_PORT": "<PROTON_IMAP_PORT>",
"PROTON_SMTP_PORT": "<PROTON_SMTP_PORT>",
"PROTON_USERNAME": "<PROTON_USERNAME>",
"PROTON_PASSWORD": "<PROTON_PASSWORD>"
}
}
}
}{
"servers": {
"proton-mail-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@alexendros/[email protected]"
],
"env": {
"PROTON_BRIDGE_HOST": "<PROTON_BRIDGE_HOST>",
"PROTON_IMAP_PORT": "<PROTON_IMAP_PORT>",
"PROTON_SMTP_PORT": "<PROTON_SMTP_PORT>",
"PROTON_USERNAME": "<PROTON_USERNAME>",
"PROTON_PASSWORD": "<PROTON_PASSWORD>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
PROTON_BRIDGE_HOSTOptional | Hostname or IP of the Proton Mail Bridge (default: 127.0.0.1 for local, or container hostname in compose). |
PROTON_IMAP_PORTOptional | IMAP port exposed by Proton Mail Bridge (default: 1143). |
PROTON_SMTP_PORTOptional | SMTP port exposed by Proton Mail Bridge (default: 1025). |
PROTON_USERNAMERequired | Bridge username (your Proton Mail address). |
PROTON_PASSWORDRequired, secret | Bridge-generated app password (NOT your Proton account password). |
Details
| Package | @alexendros/[email protected] (NPM, stdio) |
| First published | 2 May 2026 |
| Last updated | 2 May 2026 |
| Registry name | io.github.Alexendros/proton-mail-mcp |
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