Nylas CLI

Nylas CLI is an AI developer tool that gives scripts and AI agents a real email account, calendar, and contact list from the terminal across Gmail, Microsoft 365, Exchange, Yahoo, iCloud, and IMAP through a single auth flow. It is a free, open-source command-line tool built headless-first and pipe-friendly, so every command runs the same way in a script, a cron job, or an autonomous agent. Nylas CLI ships with a built-in MCP server, letting you pipe email and calendar access straight into any MCP-compatible agent without a separate integration. Beyond messaging, it includes GPG encryption, webhook management, and more than 250 commands for scripting and automation. A standout feature is agent accounts: instead of borrowing a human mailbox through an OAuth handshake, you provision a real managed address on a Nylas domain (for example support@you.nylas.email) that the agent fully owns. Policy guardrails let you set rules that block, archive, or flag anything outside your defined policy before the agent acts on it. Commands such as nylas email list --unread --limit 3 return structured output you can add --json to and pipe into jq, grep, or downstream tooling. Guided setup via nylas init signs you up, creates an app and API key, and connects your first email account in one flow, with manual auth available for teams that already have an API key. It installs via Homebrew, Linux/macOS, Windows, or Go. For developers building AI agents that need to send mail, manage calendars, and enforce guardrails from the command line, Nylas CLI provides a unified, provider-agnostic entry point.

Developers and AI-agent builders use Nylas CLI to give scripts and agents a real, provider-agnostic email, calendar, and contact account from the terminal with policy guardrails.