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How to Use the Lexware Office (Accounting & Invoicing) MCP in Mastra AI

Automate complex billing workflows and German tax compliance using Mastra AI and our Lexware Office MCP Server.

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Connect Lexware Office (Accounting & Invoicing) MCP to Mastra AI

Create your Vinkius account to connect Lexware Office (Accounting & Invoicing) 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.

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Multi-step billing workflows with Mastra AI.

The `list_invoices` and `get_invoice` tools allow you to build automated follow-up workflows for overdue payments. Mastra AI handles the conditional logic, routing actions based on invoice status. If a payment is marked unpaid, the workflow branches to check payment terms before alerting staff.

Automated ledger reconciliation loops.

The `list_vouchers` and `list_credit_notes` tools let your system automate monthly reconciliation loops. Mastra manages the state transitions, pausing the workflow for human approval if a discrepancy is found. This ensures your ledger remains accurate without manual oversight.

Resilient contact creation via MCP Server.

The `create_contact` tool lets you sync external CRM data directly into your Lexoffice bookkeeping system. Wrapping this in a Mastra workflow ensures that every customer record is written with strict error handling. The framework retries failed requests automatically to prevent duplicate records.

Setup guide

Set up Lexware Office (Accounting & Invoicing) 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. 1

    Install dependencies

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

  2. 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. 3

    Discover and inject tools

    Call mcpClient.listTools() and spread the result into your agent's tools object. All Lexware Office (Accounting & Invoicing) tools become native Mastra tools.

  4. 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: "lexware-office-accounting-invoicing-mcp-client",
  servers: {
    "lexware-office-accounting-invoicing-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

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

const result = await agent.generate(
  "List recent Lexware Office (Accounting & Invoicing) transactions"
);
console.log(result.text);

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Lexware Office. 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.

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Common questions about Lexware Office (Accounting & Invoicing) MCP in Mastra AI

Instantiate `MCPClient` pointing to your Vinkius endpoint, then call `mcpClient.listTools()`. Spread these tools directly into your Mastra Agent constructor to give it immediate access.
Yes. You can configure `requireToolApproval` on critical actions like `create_contact` to halt execution until a finance manager signs off on the new customer record.
Mastra AI automatically manages rate limits using its workflow retry engine. If `list_vouchers` fails due to rate limits, the system backs off and retries without dropping the execution state.
You can deploy your agent using a single command to any cloud provider. The environment variables containing your Lexoffice credentials remain securely stored in your deployment environment.
No. The framework processes your customer records, DATEV tax categories, and transaction histories in-memory during workflow execution. Vinkius secures the MCP Server gateway, ensuring zero persistent storage of your financial details.

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