Working with nylas mcp serve: Start the Nylas MCP server for AI assistant integration

Source: Dev.to

Overview

The nylas mcp serve command starts a Model Context Protocol (MCP) server that exposes Nylas email, calendar, and contacts as tools for AI assistants. Choose the transport mode that matches your integration:

• --transport stdio – direct piping to Claude Code, Cursor, or VS Code.
• --transport sse – network‑based connections (Server‑Sent Events).

Usage

nylas mcp serve [--transport stdio|sse] [--port PORT]

Start in stdio mode (for Claude Code)

nylas mcp serve --transport stdio

Start an SSE server on a custom port

nylas mcp serve --transport sse --port 3200

Debugging

Add --verbose to see the underlying API requests and responses—useful when something doesn’t behave as expected.

nylas mcp serve --transport stdio --verbose

Script‑friendly options

• --json – output machine‑readable JSON.
• --yes – automatically confirm prompts (where supported), enabling seamless use in automated pipelines.

nylas mcp serve --transport sse --port 3200 --json --yes

Model Context Protocol (MCP)

MCP is an open standard from Anthropic that defines how AI assistants discover and call external tools. The Nylas MCP server registers email, calendar, and contact operations as tools, so your assistant automatically sees them in its tool palette.

Related Nylas MCP commands

• nylas mcp install – install MCP configuration for AI assistants (Claude, Cursor, VS Code).
• nylas mcp status – check the status of the Nylas MCP server.
• nylas mcp uninstall – remove MCP integration from an AI assistant.

Documentation

• Full docs: [nylas mcp serve reference] – all flags, advanced examples, and troubleshooting.
• All commands: [Nylas CLI Command Reference]

Installation

brew install nylas/nylas-cli/nylas

Other installation methods are available in the Nylas CLI documentation.