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Connector guide3-minute read21 MCP tools7 languages

How to Connect Lexware Office to Claude — via MCP

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

HCBy HelpCode teamUpdated 3 min read Open-source on GitHub
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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
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  • Open-source on GitHub
    Open source · AGPL-3.0
  • Works with ChatGPT, Claude, Gemini
    Any MCP-compatible client

Skip the install. Get this working in under 2 minutes.

Start a free trial on cloud.anythingmcp.com, add the Lexware Office in one click, then point your AI client (Claude, ChatGPT, Copilot or Cursor) at the generated MCP endpoint. No Docker, no git clone, zero engineering experience required.

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AnythingMCP is listed in Claude's connector directory: add it to Claude in one click (opens in a new tab), then sign in and choose which MCP servers Claude may use.

Summary

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

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.

💡 No install? Use cloud.anythingmcp.com directly. Sign in, click Connectors → Lexware Office, paste your credentials, mint an MCP API key — done. No Docker, no git clone, no local server.

Lexware Office + Claude

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

Prerequisites

See the full setup instructions baked into the connector (visible in the in-app store when you select the connector). The required environment variables for this connector are:

LEXWARE_API_KEY

Step 1 — Get credentials

Getting a token

  1. Sign in to Lexware Office (lexoffice) with an account on a paid plan — the API is not available on the free tier.
  2. Open Einstellungen → Erweiterungen → Öffentliche API and create a new access token. The token is shown once; store it immediately.
  3. Set LEXWARE_API_KEY to that value. It is a personal token scoped to the one company (Mandant) it was created in; a tax adviser handling several clients needs one connector per client.

…(continued in the in-app connector instructions)

Step 2 — Install the adapter

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

Step 3 — Add the connector in Claude

Your server URL: in AnythingMCP, open MCP Servers → the server this connector is on, and copy its URL (https://cloud.anythingmcp.com/mcp/…). Use it wherever this guide shows YOUR_SERVER_ID.

Recommended path — works on claude.ai web without editing any config file.

  1. In Claude, open Customize → Connectors.
  2. Click +, then Add custom connector.
  3. Enter a name, e.g. Lexware Office, and the remote MCP server URL https://cloud.anythingmcp.com/mcp/YOUR_SERVER_ID, then click Add.
  4. Click Connect and sign in to AnythingMCP (OAuth) to allow access.

All tools below appear in your chat — start typing prompts.

Available tools

ToolWhat it does
lexware_office_get_profileRead the connected company profile: company name, tax number, VAT id, the connection's user id and the small-business (Kleinunternehmer) fla
lexware_office_list_contactsList contacts (customers and vendors) with paging
lexware_office_get_contactRead one contact by its Lexware id, including all addresses, the customer/vendor roles, contact persons, e-mail addresses and phone numbers
lexware_office_list_vouchersSearch the voucher list — the bookkeeping view across sales invoices, purchase invoices, credit notes, down payments and receipts
lexware_office_get_invoiceRead one sales invoice in full: header, addressee, every line item with net/gross and tax rate, the total amounts, the payment terms and the
lexware_office_get_quotationRead one quotation (Angebot) in full, including its line items, totals, validity date and current status
lexware_office_get_credit_noteRead one credit note (Rechnungskorrektur) in full: the invoice it corrects, its line items and its totals
lexware_office_list_articlesList articles (Artikel) from the product catalogue, optionally narrowed by article number or type, so an invoice line can reference a real p
lexware_office_list_countriesList the country codes Lexware Office accepts in an address, with their tax classification (intra-community, third country)
lexware_office_create_contactCreate a new contact with the customer and/or vendor role
lexware_office_create_invoiceCreate a sales invoice
lexware_office_get_voucherRead one bookkeeping voucher (voucher-list voucherType salesinvoice, salescreditnote, purchaseinvoice or purchasecreditnote): contact…
lexware_office_get_sales_documentRead one down payment invoice, order confirmation, delivery note or dunning by id

FAQ

Does it work with Claude Code as well as Claude Desktop? Yes — point both at https://cloud.anythingmcp.com/mcp/YOUR_SERVER_ID.

Next steps

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