How to Use the freee MCP in Vercel AI SDK

Q: Can I stream a list of invoices from freee into my Vercel AI SDK app?

Absolutely. Just have your agent call the listinvoices tool. The Vercel AI SDK is built for streaming, so each invoice will appear in your UI as it's received from the server.

Build real-time financial dashboards for your Japanese operations with the Vercel AI SDK and the freee MCP server.

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Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect freee MCP to Vercel AI SDK

Create your Vinkius account to connect freee 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.

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Setup freee with Vercel AI SDK

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Stream Financial Data into Your UI

This MCP server connects your Vercel AI SDK app directly to your freee accounting data. Your agent can call `list_invoices` or `list_deals` and the results stream straight into your React or Svelte components. Users see transactions appearing in the UI instantly, not after a loading spinner. There’s no need to build a separate backend just to fetch and forward data. You call `streamText`, pass it the freee tools, and the AI SDK handles the connection. It works perfectly inside Vercel Edge Functions, keeping your app fast and responsive.

Build Interactive Audit Tools

Give your users an agent that can dig into financial details on command. When a user clicks a transaction in your app, your agent can use `get_deal` and `get_partner` to pull the underlying records from freee. It's a simple way to build powerful, context-aware financial tools. The data streams back as it's found, so the experience feels immediate. This lets you turn a static report into a dynamic audit interface where your users can ask the AI to fetch supporting documents or check balances with `list_walletables`.

A Simple Accounting Layer for Vercel AI SDK

This server exposes nine core freee accounting operations as ready-to-use tools. You don't have to study the freee API docs, handle auth, or manage infrastructure. Your agent gets simple functions like `list_accounts` and `list_taxes`. Just point the Vercel AI SDK's MCP client to the URL Vinkius gives you. You get a secure, sandboxed connection to your accounting data that you can use in any Next.js, Svelte, or Vue application.

Setup guide

Set up freee 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 freee 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 freee 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 freee. 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 freee 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 freee MCP in Vercel AI SDK

First, subscribe to the server on Vinkius to get your unique endpoint URL. Then, in your code, install `@ai-sdk/mcp`, create a client pointing to that URL, and pass the tools to `generateText` or `streamText`. That's it.

Yes, Vinkius provides a free tier for all MCP servers. You can connect your Vercel AI SDK application and make a limited number of calls to tools like `list_deals` to see how it works before committing to a paid plan.

Absolutely. Just have your agent call the `list_invoices` tool. The Vercel AI SDK is built for streaming, so each invoice will appear in your UI as it's received from the server.

This server handles the authentication, API schema, and infrastructure for you. Instead of writing custom fetch logic, you just give your agent the tool name, like `list_expenses`, and it works. It's much faster to get started.

Your freee data, such as invoice and partner details, is streamed through an encrypted, ephemeral Vinkius sandbox. The data is only active for the duration of the request and is never stored. Your Vinkius token is the only key to this temporary connection.

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