# Lexware Office Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## Lexware Office

Read and create invoices, contacts, quotations and financial documents in Lexware Office accounting software.

- Record: https://musedirectory.ai/connector/lexware-office
- Category: Finance & Bills
- Developer: usefulapi (https://usefulapi.io/lexware-office/)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 1768ms, checked 2026-10-29T10:31:21Z
- Endpoint: https://lexware-office.usefulapi.io/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-29T12:41:36Z)
- Source: Found in the official MCP Registry (io.usefulapi/lexware-office) https://registry.modelcontextprotocol.io/v0/servers?search=io.usefulapi%2Flexware-office

Connects to Lexware Office, German accounting and invoicing software. Muse can read invoices, quotations, credit notes, contacts, articles and payment status; create new contacts and draft invoices for review before finalization.

Example request: "Show me all unpaid invoices from the last month and create a draft invoice for a new customer."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Lexware Office to help me. It is a free service with an MCP server at https://lexware-office.usefulapi.io/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- lexware_get_profile: The connected Lexware Office organization: organizationId, company name, the user who created the API key, tax type (net/gross/vatfree), small-business flag (Kleinunternehmer), distance-sales principle and the plan's business features (INVOICING, INVOICING_PRO, BOOKKEEPING). Good
- lexware_list_contacts: List customers and vendors, optionally filtered (filters combine with AND). name and email match as case-insensitive substrings (at least 3 characters; _ and % are wildcards). Paged: pass next_page as page. GET /v1/contacts.
- lexware_list_articles: List articles (products and services usable as invoice line items), with price, tax rate and unit. Optional exact filters by article number, GTIN or type. Paged: pass next_page as page. GET /v1/articles.
- lexware_list_vouchers: Search the voucher list: metadata (id, type, status, number, dates, contact, total and open amount) of sales documents (invoice, quotation, creditnote, orderconfirmation, deliverynote, downpaymentinvoice) and bookkeeping vouchers (salesinvoice, salescreditnote, purchaseinvoice, p
- lexware_get_invoice: Get one invoice by id: status (draft/open/paid/voided), line items, totals, tax amounts, payment and shipping conditions, related vouchers. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1/invoices/{id}.
- lexware_get_quotation: Get one quotation by id: status (draft/open/accepted/rejected), expiration date, line items, totals. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1/quotations/{id}.
- lexware_get_credit_note: Get one credit note by id: status, line items, totals, related invoice. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1/credit-notes/{id}.
- lexware_get_order_confirmation: Get one order confirmation by id: status, line items, totals, delivery terms. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1/order-confirmations/{id}.
- lexware_get_delivery_note: Get one delivery note by id: status, line items, shipping conditions. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1/delivery-notes/{id}.
- lexware_get_down_payment_invoice: Get one down payment invoice (Abschlagsrechnung) by id: status, amounts, related closing invoice. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1/down-payment-invoices/{id}.
- lexware_get_dunning: Get one dunning (payment reminder) by id: status, the dunned invoice in relatedVouchers, line items, totals. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1/dunnings/{id}.
- lexware_get_bookkeeping_voucher: Get one bookkeeping voucher (salesinvoice, salescreditnote, purchaseinvoice or purchasecreditnote from the voucher list) by id: status, voucher items with posting category ids, tax amounts, contact, file ids. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1
- lexware_get_article: Get one article (product or service) by id: title, type, article number, GTIN, unit, net/gross price and tax rate. GET /v1/articles/{id}.
- lexware_get_contact: Get one contact (customer and/or vendor) by id: customer/vendor numbers, company or person, contact persons, addresses, emails, phones, note. Includes lexwareAppUrl, a link that opens it in Lexware Office. GET /v1/contacts/{id}.
- lexware_get_payments: Payment status of an invoice, credit note, down payment invoice or bookkeeping voucher: open amount, payment status (balanced/openRevenue/openExpense), paid date and the payment items (bank transactions, cash, credit notes, Skonto). Not available for quotations or drafts. GET /v1
- lexware_list_countries: Countries known to Lexware Office with their code, English and German name and tax classification (de, intraCommunity, thirdPartyCountry). GET /v1/countries.
- lexware_list_payment_conditions: The payment conditions configured in Lexware Office (days until due, early-payment discount, label template, which is the organization default). GET /v1/payment-conditions.
- lexware_list_posting_categories: Bookkeeping posting categories (id, name, group, income or outgo, whether a contact is required and split tax rates are allowed), used by bookkeeping vouchers' categoryId. Optionally only income or outgo. GET /v1/posting-categories.
- lexware_create_contact: WRITE: creates a new customer and/or vendor in Lexware Office (Lexware assigns the customer/vendor number). Give company_name for a company OR person_last_name for a private person. One billing and one shipping address, one email and one phone at most. Check lexware_list_contacts
- lexware_create_draft_invoice: WRITE: creates an invoice in Lexware Office as a DRAFT (never finalized, numbered or sent; Lexware assigns the number when the user finalizes it in the app). Address it to an existing customer (contact_id) or a one-time address (name + country_code). Prices are EUR. Returns the n
- lexware_create_draft_quotation: WRITE: creates a quotation (Angebot) in Lexware Office as a DRAFT (never finalized or sent). Address it to an existing customer (contact_id) or a one-time address (name + country_code). Prices are EUR. Returns the new id and lexwareAppUrl to review and finalize it in Lexware Offi

Screening checks:
- MCP handshake: pass (Answered in 41ms)
- Domain against threat feeds (Cloudflare security DNS): pass (lexware-office.usefulapi.io, usefulapi.io not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (21 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)