Node MCP Server

Mailjet API client

Local serverstdioTypeScript

What is the Node MCP server?

Most team communication work still happens through a UI a human drives. Node MCP server moves it into the conversation instead. Mailjet API client.

The short version

Welcome to the [Mailjet][mailjet] official JavaScript SDK built with webpack, babel & es5. \ This can be used in node or in the browser.

The tools it exposes

The server publishes 4 tools. What each one is for:

  • v3.1 — The Email Send API v3.1, which is the latest version of our Send API
  • Authentication — The Mailjet Email API uses your public and secret keys for authentication
  • Options — options have this structure: - headers - associative array describing additional header fields which you can pass to the request - timeout -
  • Config — config have this structure: - host - sets custom host URL - version - sets required version of API for determinate endpoint (set of v3, v3.1, v4) -

Getting it running

Installation goes through your MCP client rather than a global install: point it at node-mailjet on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.

What it needs from you

Configuration is passed through the environment: MJ_APIKEY_PUBLIC, MJ_APIKEY_PRIVATE, MJ_API_TOKEN. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

How it compares

Among the team communication options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Node's toolset — v3.1, Authentication, Options and 1 more — is a fair guide to whether it matches your workflow. It is maintained by oleksandr-mazepa; worth a glance at recent repository activity before you build anything load-bearing on it.

This entry was verified against Node's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.

Things to watch

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

Available tools

ToolWhat it does
v3.1The Email Send API v3.1, which is the latest version of our Send API
AuthenticationThe Mailjet Email API uses your public and secret keys for authentication.
Optionsoptions have this structure: - headers - associative array describing additional header fields which you can pass to the request - timeout - specifies the number of milliseconds before the request times out - proxy - def
Configconfig have this structure: - host - sets custom host URL - version - sets required version of API for determinate endpoint _(set of v3, v3.1, v4)_ - output - indicates the type of data that the server will respond with

How to install the Node MCP server

{
  "mcpServers": {
    "mailjet": {
      "command": "npx",
      "args": ["-y", "node-mailjet"],
      "env": {
        "MJ_APIKEY_PUBLIC": "your-value",
        "MJ_APIKEY_PRIVATE": "your-value",
        "MJ_API_TOKEN": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

VariableDescriptionRequired
MJ_APIKEY_PUBLICCredential the server authenticates with.Yes
MJ_APIKEY_PRIVATECredential the server authenticates with.Yes
MJ_API_TOKENCredential the server authenticates with.Yes

Example prompts to try

  • Use Node to v3.1.
  • Use Node to Authentication.
  • Use Node to Options.

Frequently asked questions

It connects Node to MCP-compatible AI assistants such as Claude and Cursor, exposing 4 tools (v3.1, Authentication, Options, and more) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Node directly.