Mail and contacts on a self-hosted Stalwart server via JMAP: search, read, OCR, send, drafts.
To add stalwart-mail-mcp to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 8 environment variables, listed below.
Install
npx -y stalwart-mail-mcp@2.3.0Environment variables
STALWART_URLSet in your MCP configSTALWART_USERSet in your MCP configSTALWART_PASSWORDSet in your MCP configMAIL_LANGSet in your MCP configMAIL_OCR_PROVIDERSet in your MCP configMAIL_OCR_API_KEYSet in your MCP configMAIL_OCR_MODELSet in your MCP configMAIL_OCR_BASE_URLSet in your MCP configInstall with your client
claude mcp add stalwart-mail --env STALWART_URL=<YOUR_STALWART_URL> --env STALWART_USER=<YOUR_STALWART_USER> --env STALWART_PASSWORD=<YOUR_STALWART_PASSWORD> --env MAIL_LANG=<YOUR_MAIL_LANG> --env MAIL_OCR_PROVIDER=<YOUR_MAIL_OCR_PROVIDER> --env MAIL_OCR_API_KEY=<YOUR_MAIL_OCR_API_KEY> --env MAIL_OCR_MODEL=<YOUR_MAIL_OCR_MODEL> --env MAIL_OCR_BASE_URL=<YOUR_MAIL_OCR_BASE_URL> -- npx -y stalwart-mail-mcp@2.3.0
Run this in a terminal to add the server to Claude Code.
What this does
stalwart-mail-mcp exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
STALWART_URL STALWART_USER STALWART_PASSWORD MAIL_LANG MAIL_OCR_PROVIDER MAIL_OCR_API_KEY MAIL_OCR_MODEL MAIL_OCR_BASE_URL
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install stalwart-mail-mcp?
Run the Claude Code command in the install section to add stalwart-mail-mcp to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with stalwart-mail-mcp?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to stalwart-mail-mcp as well.
Does stalwart-mail-mcp need an API key?
Yes. Before it can run, set these environment variables: STALWART_URL, STALWART_USER, STALWART_PASSWORD, MAIL_LANG, MAIL_OCR_PROVIDER, MAIL_OCR_API_KEY, MAIL_OCR_MODEL, MAIL_OCR_BASE_URL. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
Is this your MCP server?
Claim this listing to see its traffic, fix details yourself, and skip the review queue on future updates.
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