How to Use the Mail-in-a-Box MCP in Vercel AI SDK

Q: Can I list all mail users in my Next.js app?

Yes. Call the listmailusers tool from your agent. The SDK streams the array of active mailboxes straight to your frontend components.

Stream live Mail-in-a-Box admin tasks straight into your React frontend using the Vercel AI SDK.

See Vinkius in Action

Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect Mail-in-a-Box MCP to Vercel AI SDK

Create your Vinkius account to connect Mail-in-a-Box to Vercel AI SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

GDPR Free for Subscribers

Setup Mail-in-a-Box with Vercel AI SDK

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Stream live server health to the UI

This MCP server lets your Vercel AI SDK application pull real-time diagnostics via `get_system_status` directly into the browser. You watch the health metrics appear instantly for the user, bypassing loading spinners entirely. It works the same for your infrastructure footprint. You can trigger `list_mail_domains` to render active domains dynamically. The user sees their hosting environment populate instantly on the screen.

Build interactive user provisioning

Your Vercel AI SDK application can execute `create_mail_user` and `delete_mail_user` to build interactive provisioning flows. The client handles the HTTP transport while the user watches the mailbox creation succeed live. Password resets happen exactly where the customer expects them. When a support rep triggers an `update_user_password` action, the framework streams the confirmation right back to the dashboard.

Render forwarding rules instantly

This MCP Server exposes `list_mail_aliases` so your Next.js app can grab current mappings and display them natively. Complex email routing is hard to visualize, but rendering it live solves the problem. Updating those rules takes one step. The agent fires off `create_or_update_alias` or `delete_mail_alias` based on the user's chat input. The UI updates the moment the tool finishes executing.

Setup guide

Set up Mail-in-a-Box MCP in Vercel AI SDK

Prerequisites

Node.js 18+ and a TypeScript project
ai + @modelcontextprotocol/sdk packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies

Run npm install ai @modelcontextprotocol/sdk plus your preferred model provider (e.g. @ai-sdk/openai).
2

Create the Streamable HTTP transport

Use StreamableHTTPClientTransport with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and use tools

Call mcpClient.tools() to auto-discover all Mail-in-a-Box tools. Pass them directly to generateText() or streamText() — no manual schema definitions needed.
4

Works with any model provider

Swap openai("gpt-4o") for any AI SDK provider — Anthropic, Google, Mistral. The MCP tools work identically across all supported models.

index.ts

import { experimental_createMCPClient as createMCPClient } from "ai";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp";
import { generateText } from "ai";
import { openai } from "@ai-sdk/openai";

const transport = new StreamableHTTPClientTransport(
  new URL("https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")
);

const mcpClient = await createMCPClient({ transport });
const tools = await mcpClient.tools();

const { text } = await generateText({
  model: openai("gpt-4o"),
  tools,
  prompt: "List recent Mail-in-a-Box transactions",
});

console.log(text);
await mcpClient.close();

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Mail-in-a-Box. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

Why Choose Vinkius

Vinkius connects your tools to AI with real-time monitoring and automatic cost savings — all from one dashboard.

Connect Mail-in-a-Box now

Real-time monitoring

Live

visibility into every interaction

Connect your favorite tools to your AI and see exactly what's happening — every request, every response, in real time.

Built-in savings

60%

lower AI costs

Vinkius compresses data between your apps and your AI automatically. Lower bills every month — no configuration required.

Single dashboard

One

place for every integration

Every tool your AI connects to, managed from a single screen. One account, complete control.

Common questions about Mail-in-a-Box MCP in Vercel AI SDK

Use createMCPClient with the HTTP transport option. Pass the endpoint URL, then call mcpClient.tools() to feed the actions into your streamText function. Remember to close the client when you finish.

Yes. Call the list_mail_users tool from your agent. The SDK streams the array of active mailboxes straight to your frontend components.

It does. You can deploy your agent to the edge and execute Mail-in-a-Box MCP Server operations with minimal latency. Just ensure your endpoint URL is accessible from edge regions.

Keep the tool execution server-side. Your user submits the request, the agent runs update_user_password, and the SDK streams back a success message without exposing the raw credentials in the client state.

Your application touches raw passwords, email addresses, and forwarding targets. The Mail-in-a-Box MCP Server runs inside Vinkius's V8 Isolate Sandbox. The connection is ephemeral, meaning user credentials and server status logs vanish the moment the transport closes.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

OpenAI Agents SDK sdk-python

Google ADK sdk-python

Pydantic AI sdk-python

Vercel AI SDK sdk-typescript