Lettermint CLI
Send email, check what happened to a message and test webhooks on localhost, all from your terminal. You log in through your browser, so you don't need an API token.
brew install lettermint/tap/lettermintAvailable for macOS, Linux and Windows
One command and it's done
Send a test email, find out why a message hasn't arrived or set up a domain for a new client. The answer shows up in your terminal and you carry on with your work.
Send from a script
Send an email from any shell script without writing an API client. With an idempotency key, a retry never sends it twice.
Debug a delivery
Look up a message, read its delivery events and export the raw source to compare it with what your application built.
Webhooks on localhost
Forward live events to your local server without a tunnel. Fixed your handler? Replay the same event, no new email needed.
Set up a domain
Add a sending domain, check which DNS records are still missing and assign it to the projects that may send from it.
Email for your AI agent
Export the agent skill, and Claude Code or Codex knows how to send an email and check what happened to it.
Several teams, one terminal
Log in once per team and switch with one command. Each profile keeps its own default project.
Log in once, through your browser
The CLI connects to your account as an application, just like the MCP server. You approve access in your browser, and from then on every command runs with your own team permissions.
Stopped using a computer? Revoke its access under Applications in your account.
Browser login
No API token to create, copy or store.
Stored by your operating system
Your login sits in your system's credential store, not in a config file.
Your own permissions apply
The CLI only reaches the teams and projects you can access.
Signed releases
Every release comes with checksums and build provenance. The macOS and Windows builds carry our signature.
Frequently Asked Questions
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