Before: giving an AI assistant email access meant writing wrapper functions, defining tool schemas by hand, managing OAuth tokens, and re-doing all of it for every agent runtime you supported. After: one install command registers a full set of email, calendar, and contacts tools in whatever MCP host you're running, and the agent can optionally own the mailbox outright.
That's the shift MCP (Model Context Protocol) brought to agent tooling, and email is one of the clearest places to see it.
The one-command integration
If your agent runs in an MCP-capable host — Claude Code, Claude Desktop, Cursor, Windsurf, VS Code, or the OpenAI Codex CLI — the Nylas CLI registers itself as an MCP server:
nylas mcp install --assistant claude-code
