Install MailSandbox in Claude Code
This server doesn't publish a package to a registry, so follow the install steps in its README. Once it runs, register it with Claude Code:
claude mcp add mailsandbox -- <command to start the server>Frequently asked questions
What does the MailSandbox MCP server do?
MailSandbox (a fork of Mailpit) is a fast, zero-dependency email testing tool & API with a web UI, SMTP server, Postmark API emulation, and MCP server for AI-assisted debugging.
Is the MailSandbox MCP server free?
Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.
Does MailSandbox run locally or remotely?
Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.
How do I add MailSandbox to Claude Code?
Follow the install steps in the project's README at https://github.com/btafoya/mailsandbox, then register it with "claude mcp add".
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