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To add mailsnail 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 7 environment variables, listed below.
Install
npx -y mailsnail@0.6.0Environment variables
MAIL_PROVIDERSet in your MCP configMAIL_API_BASE_URLSet in your MCP configCLICK2MAIL_USERNAMESet in your MCP configCLICK2MAIL_PASSWORDSet in your MCP configLOB_API_KEYSet in your MCP configMAIL_MCP_ALLOW_LIVESet in your MCP configMAIL_MCP_SPEND_CAP_USDSet in your MCP configInstall with your client
claude mcp add mailsnail --env MAIL_PROVIDER=<YOUR_MAIL_PROVIDER> --env MAIL_API_BASE_URL=<YOUR_MAIL_API_BASE_URL> --env CLICK2MAIL_USERNAME=<YOUR_CLICK2MAIL_USERNAME> --env CLICK2MAIL_PASSWORD=<YOUR_CLICK2MAIL_PASSWORD> --env LOB_API_KEY=<YOUR_LOB_API_KEY> --env MAIL_MCP_ALLOW_LIVE=<YOUR_MAIL_MCP_ALLOW_LIVE> --env MAIL_MCP_SPEND_CAP_USD=<YOUR_MAIL_MCP_SPEND_CAP_USD> -- npx -y mailsnail@0.6.0
Run this in a terminal to add the server to Claude Code.
What this does
mailsnail 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:
MAIL_PROVIDER MAIL_API_BASE_URL CLICK2MAIL_USERNAME CLICK2MAIL_PASSWORD LOB_API_KEY MAIL_MCP_ALLOW_LIVE MAIL_MCP_SPEND_CAP_USD
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install mailsnail?
Run the Claude Code command in the install section to add mailsnail 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 mailsnail?
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 mailsnail as well.
Does mailsnail need an API key?
Yes. Before it can run, set these environment variables: MAIL_PROVIDER, MAIL_API_BASE_URL, CLICK2MAIL_USERNAME, CLICK2MAIL_PASSWORD, LOB_API_KEY, MAIL_MCP_ALLOW_LIVE, MAIL_MCP_SPEND_CAP_USD. 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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[](https://clauderules.net/mcp/io-github-iancollins27-mailsnail)<a href="https://clauderules.net/mcp/io-github-iancollins27-mailsnail" target="_blank" rel="noopener noreferrer"><img src="https://clauderules.net/api/badge/io-github-iancollins27-mailsnail" alt="Listed on clauderules.net" /></a>More AI MCP servers
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