How to Use the freee MCP in Mastra AI

Build resilient accounting workflows for your Japanese operations using Mastra AI and the freee MCP server.

See Vinkius in Action

Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect freee MCP to Mastra AI

Create your Vinkius account to connect freee to Mastra AI 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 freee with Mastra AI

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Automate Invoice Reconciliation

This server gives your Mastra AI agent the tools to manage your accounting pipeline. Create a workflow that regularly calls `list_deals` and `list_invoices`, automatically matching payments to invoices. It's a reliable way to keep your books clean. Use Mastra's built-in conditional logic to handle exceptions. If a deal doesn't match an invoice, the agent can flag it and trigger a notification. You're not just fetching data; you're building a system that makes decisions.

Build Fault-Tolerant Financial Workflows

APIs can be unreliable, especially during peak hours. With Mastra AI, if a call to `list_partners` or `list_expenses` fails, the framework's automatic retry logic kicks in. Your accounting processes don't grind to a halt because of a temporary network blip. You can design multi-step processes, like onboarding a new partner and creating their first deal, and trust that Mastra will see it through. Set `requireToolApproval` to add a human checkpoint before critical actions are taken.

Your Mastra AI Accounting Engine

Connect Mastra AI to this MCP Server to give your agents a direct line to Japanese accounting tasks. It exposes nine key freee operations, including `list_taxes` and `list_walletables`, without you writing any integration code. Your agent can construct complex reports, monitor account balances, and manage expense applications. Since Mastra handles the state and logic, you can focus on defining the workflow, not the plumbing.

Setup guide

Set up freee MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All freee tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "freee-mcp-client",
  servers: {
    "freee-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "freee Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to freee tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent freee transactions"
);
console.log(result.text);

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 Mastra AI

Subscribe on Vinkius to get your server URL. In your Mastra AI setup, instantiate the `MCPClient` with your server's name and URL. Then you can call `mcpClient.listTools()` and add them to your agent.

Yes. Mastra AI supports human-in-the-loop workflows. You can configure your agent to pause and wait for your approval before it executes a specific tool, like one that modifies partner data via the `freee` API.

Definitely. Vinkius offers a free tier that's perfect for development. You can connect your Mastra AI agent and run workflows using tools like `list_invoices` to confirm everything works before you upgrade.

Mastra AI has built-in resilience. If a tool call fails, it can automatically retry with exponential backoff. This ensures your accounting automations are robust and can handle temporary service interruptions.

All communication between your Mastra AI agent and freee goes through a secure Vinkius sandbox. Your financial data, including expense reports and deal records, is processed in an isolated environment and is never logged or stored by Vinkius.

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