nylas/cli

Email, calendar, and contacts from your terminal. One CLI for Google, Microsoft, and IMAP -- no SMTP config, no provider SDKs, no boilerplate.
**Documentation** | **API Reference**
Install
**Homebrew (macOS/Linux):**
**Go:**
**Binary:** Download from Releases and add to PATH.
**Docker:**
See Docker development notes for credential and volume usage.
Get Started
1. Run the setup wizard
The wizard walks you through four steps:
1. **Account** -- Create a free Nylas account (via Google, Microsoft, or GitHub SSO), or log into an existing one
2. **Application** -- Select an existing app or create your first one automatically
3. **API Key** -- Generate and activate a key (stored securely in your system keyring)
4. **Email Accounts** -- Detect and sync any email accounts already connected to your app
That's it. You're ready to go:
Already have an API key?
Skip the interactive wizard entirely:
Just want to explore first?
Try the demo mode -- no account or API key needed:
Connect an email account later
After setup, you can authenticate additional email accounts at any time:
What You Can Do
Email
Calendar
Contacts
Webhooks
Timezone Tools (works offline, no API key required)
**Full Command Reference**
Interfaces
The CLI has two ways to interact with your data:
| Interface | Launch | Description |
|-----------|--------|-------------|
| **CLI** | nylas | Standard command-line interface |
| **TUI** | nylas tui | Interactive terminal UI with vim keys and 9 themes |
AI & MCP Integration
Give your AI coding agent access to email, calendar, and contacts:
Works with Claude Code, Cursor, Codex CLI, and any MCP-compatible assistant. For agent-focused markdown references, see the email agents, calendar agents, MCP agents, and Agent Accounts hubs.
Guides
Step-by-step tutorials on cli.nylas.com:
- Give your AI coding agent an email address -- Claude Code, Cursor, Codex CLI, and OpenClaw
- Send email from the command line -- one command, no SMTP
- AI agent email access via MCP -- connect any MCP-compatible assistant
- Manage calendar from the terminal -- events, availability, timezone handling
Configuration
Credentials are stored in your system keyring (macOS Keychain, Linux Secret Service, Windows Credential Manager). Non-secret grant metadata, such as account email/provider and the local default grant, is cached separately for fast local lookup.