Connector guide4-minute read21 MCP tools7 languages

Lexware Office with Claude and ChatGPT: Invoices and Quotes

Draft Lexware Office invoices and quotes, find customers, see which vouchers are still open and get invoice PDFs, just by asking Claude, ChatGPT or Copilot.

HCBy HelpCode teamUpdated 4 min read Open-source on GitHub

No credit card · 7-day trial · Self-host alternative available

Lexware Office

Lexware Office

Lexware Office (formerly lexoffice) — Germany's most-used SMB bookkeeping app. Read and create contacts, invoices, quotations, delivery notes and articles, read credit notes, vouchers and document PDFs, and pull the voucher list that drives the Buchhaltung. Public REST API v1, bearer token.

tools

21

Region

DE

Category

Accounting

Authentication

Bearer Token

Required env vars

LEXWARE_API_KEY
Install in one click on Cloud

7-day free trial · No credit card

  • 7-day free trial
    No credit card required
  • GDPR & SOC 2 ready
    EU data residency, audit logs
  • Open-source on GitHub
    Open source · AGPL-3.0
  • Works with ChatGPT, Claude, Gemini
    Any MCP-compatible client

Summary

Draft Lexware Office invoices and quotes, find customers, see which vouchers are still open and get invoice PDFs, just by asking Claude, ChatGPT or Copilot.

Guided setup

Connect Lexware Office to Claude, ChatGPT or Copilot in 2 minutes

Start a free trial on AnythingMCP Cloud, connect Lexware Office in the guided setup, then add your MCP URL to your AI assistant. No code and no server to run.

No credit card · 7-day trial · Self-host alternative available

Try asking

Example prompts for Lexware Office

Click any prompt to copy it. Paste into Claude, ChatGPT, Cursor, Gemini, Copilot or OpenClaw to run it against this connector.

Lexware Office · live via MCP
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Opus 4.7

Claude is AI and can make mistakes. Please double-check responses.

Lexware Office

Your bookkeeping, one sentence away

Lexware Office (formerly lexoffice) is the bookkeeping app of hundreds of thousands of German small businesses and freelancers: contacts, quotes, invoices, delivery notes, receipts and the voucher list your tax adviser works from.

The work around it is repetitive. Look up the customer, copy the address, pick the articles, check the tax rate, save the draft. Find out which invoices are still unpaid. Send the PDF again.

With the Lexware Office connector for AnythingMCP, Claude, ChatGPT, Copilot and other AI assistants can do this directly in your Lexware Office company. You ask in plain language, the assistant reads or prepares the document, and you check it.

Pick your client:

What you can ask

NeedSample prompt
Draft an invoice"Create a draft invoice for Müller GmbH: 8 hours consulting at €95 and 1× setup fee, 19% VAT. Show it to me before saving."
Draft a quote"Prepare a quotation for Bäckerei Hofmann with articles WEB-01 and WEB-04, valid for 30 days."
Open items"Which sales invoices are still open, oldest first, with amount and customer?"
Customer lookup"Do we already have a contact for 'Schreinerei Weber'? Show the billing address and e-mail."
New customer"Create a customer contact for Weber Holzbau GmbH, Hauptstraße 4, 79098 Freiburg."
Invoice details"Show me invoice RE-2026-0142 with every line item and the payment terms."
Invoice PDF"Get the PDF of invoice RE-2026-0142 so I can forward it."
Month overview"List all purchase invoices from October and total them by vendor."
Delivery note"Create a draft delivery note for order 1043: 20 boxes of article PK-200 to the customer's shipping address."
Article catalogue"Raise the price of article SUP-12 to €49 net and keep everything else as it is."
Company check"Is our company set up as a Kleinunternehmer in Lexware Office? What VAT ID is stored?"

Drafts first, nothing booked by accident

The connector is built so the assistant prepares and you decide:

  • Invoices are saved as drafts unless you explicitly ask to finalize one. A draft can still be edited or deleted in Lexware Office; a finalized invoice is booked and becomes legally binding.
  • Quotations and delivery notes are always drafts. You review and send them from Lexware Office.
  • Most AI clients ask before a tool that writes. Claude, for example, shows you the call and waits for your OK.
  • You choose what is allowed. In AnythingMCP you can switch off single tools, such as creating invoices, or keep them for some roles only. A read-only setup for your tax adviser is a few clicks.

The 21 tools cover the company profile, contacts, the voucher list, sales invoices, quotations, credit notes, delivery notes, down payment invoices, order confirmations, dunnings, articles, countries and PDF downloads.

Combine it with your other systems

AnythingMCP puts several connectors behind one MCP endpoint, so one question can span more than Lexware Office:

  • "For every WooCommerce order completed yesterday, create a draft invoice in Lexware Office." (with the WooCommerce connector)
  • "Which Lexware customers with open invoices also have an open deal in our CRM?"
  • "Search our shared drive for the signed offer from Hofmann and draft the matching invoice." (with File Search)

Two minutes from zero to working

You need a Lexware Office plan that includes the public API (the free tier does not).

  1. In Lexware Office open Einstellungen → Erweiterungen → Öffentliche API and create a token. It is shown once.
  2. On AnythingMCP Cloud install the Lexware Office connector and paste the token as LEXWARE_API_KEY.
  3. Create an MCP API key and add the MCP URL to your AI client.

The token belongs to one company (Mandant). A tax adviser who looks after several clients adds one connector per client.

Self-hosted:

curl -fsSL https://raw.githubusercontent.com/HelpCode-ai/anythingmcp/main/docker-compose.quickstart.yml -o docker-compose.yml
printf 'JWT_SECRET=%s\nENCRYPTION_KEY=%s\n' "$(openssl rand -hex 32)" "$(openssl rand -hex 32)" > .env
docker compose up -d

Open http://localhost:3000/connectors/store, search Lexware Office and paste the token.

Get started

First prompt to try: "Which of our invoices are still open, and who owes us the most?"

Was this guide helpful?

Connect Lexware Office to Claude, ChatGPT or Copilot in 2 minutes

Start a free trial on AnythingMCP Cloud, connect Lexware Office in the guided setup, then add your MCP URL to your AI assistant. No code and no server to run.

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