Lexware Office MCP by usefulapi MCP Server

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 first to avoid duplicates. POST /v1/contacts.

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 new id and lexwareAppUrl to review and finalize it in Lexware Office. POST /v1/invoices (without finalize).

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 Office. POST /v1/quotations (without finalize).

Get one article (product or service) by id: title, type, article number, GTIN, unit, net/gross price and tax rate. GET /v1/articles/{id}.

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/vouchers/{id}.

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}.

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}.

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}.

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}.

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}.

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}.

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}.

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/payments/{voucherId}.

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 first call. GET /v1/profile.

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}.

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.

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.

Countries known to Lexware Office with their code, English and German name and tax classification (de, intraCommunity, thirdPartyCountry). GET /v1/countries.

The payment conditions configured in Lexware Office (days until due, early-payment discount, label template, which is the organization default). GET /v1/payment-conditions.

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.

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, purchasecreditnote). Omit voucher_types / voucher_statuses for all. Then fetch details with the matching get tool (invoice → lexware_get_invoice, quotation → lexware_get_quotation, creditnote → lexware_get_credit_note, orderconfirmation → lexware_get_order_confirmation, deliverynote → lexware_get_delivery_note, downpaymentinvoice → lexware_get_down_payment_invoice, the four bookkeeping types → lexware_get_bookkeeping_voucher). Dates are yyyy-mm-dd, whole days in German time. Up to 10,000 results can be paged through; narrow the dates for more. GET /v1/voucherlist.