HEY! It's the command-line interface!
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A CLI and TUI for HEY: your email and calendar, in the terminal and in your coding agent's hands.
Install
mise
mise use -g github:basecamp/hey-cli
Omarchy
omarchy-mise-install github:basecamp/hey-cli hey
macOS / Linux / WSL2
curl -fsSL https://hey.com/install-cli | bash
Windows (PowerShell)
irm https://hey.com/install-cli.ps1 | iex
Homebrew, Scoop, Nix, packages and source builds: docs/install.md.
Getting started
hey # sign in with your browser and connect your coding agents
hey tui # open the app
The app has Mail, Contacts, Calendar and Journal, with HEY's own keyboard shortcuts.
Press ? to see them. It follows HEY live: a thread you archive on your phone leaves the
screen a moment later.
Using the CLI
hey box view imbox # threads in a box
hey thread read 12345 # a whole thread, as Markdown
hey reply 12345 -m "Friday works for me."
hey compose --to [email protected] --subject "Lunch?" -m "Thursday at noon?"
hey search --from [email protected] --date last_30_days
hey screener list # first-time senders waiting on you
hey event add "Design review" --starts-on 2026-09-02 --start-time 14:00
hey watch --box imbox --events new # a line of JSON for every new email, as it lands
Every command explains itself with --help. At a terminal the output is made for reading.
Piped, a command that returns data writes JSON, and --jq filters it without a separate
jq:
hey box view imbox --jq '.data.postings[] | {topic_id, subject}'
hey label view 789 --ids-only # one ID per line, for xargs
Coding agents
The setup wizard connects the agents it finds. To do it yourself:
hey setup claude # skill + the hey@37signals plugin for Claude Code
hey setup codex # skill for Codex
claude mcp add hey -- hey mcp # HEY as MCP tools, on your signed-in account
hey mcp saves drafts and never sends mail. You send a draft from HEY or with hey draft send <id>.
Docs
Something wrong? hey doctor checks the install, sign-in and agent setup.
Development
make build # build ./bin/hey
make test # run tests
make lint # run golangci-lint
CONTRIBUTING.md has the rest. STYLE.md is the Go style.
License
MIT. See LICENSE.md.
