Lexoffice is a cloud-based accounting software designed for freelancers and small businesses, offering invoicing, expense management, and integration with banks
Lexoffice is a cloud-based accounting software designed for freelancers and small businesses, offering invoicing, expense management, and integration with banks On Nagent, Lexoffice is exposed as a fully-configurable accounting integration that any agent can call — 42 actions, and API key authentication. No code is required to wire Lexoffice into your workflow — connect it once via the External Integrations panel and reuse it across every agent you build.
Agent builders use Lexoffice to automate the kinds of tasks accounting teams previously handled manually. Concrete examples — each one is a single agent step in Nagent — include:
Every action and trigger is paired with a structured input/output schema (visible in the sections below), so when you wire Lexoffice into Helix — our agentic agent builder — the editor knows exactly what each step expects and produces. Configure once, deploy anywhere across your Nagent agents.
Every operation an agent can call against Lexoffice, with input parameters and output schema. Drop these into any step of an agent built in Helix.
LEXOFFICE_CREATE_ARTICLETool to create a new article (product or service) in Lexoffice. Use when you need to add items to the product/service catalog for invoicing or quotations. The leadingPrice field must be uppercase (NET or GROSS).
Input parameters
Type of article: PRODUCT for physical goods or SERVICE for services.
Price information including net/gross price, tax rate, and which price is leading.
The title/name of the article (product or service).
Unit of measurement for the article (e.g., piece, hour, kg, meter). This field is required by the Lexoffice API.
Optional article number for internal identification. If not provided, Lexoffice will auto-generate one.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_CREATE_CONTACTTool to create a new contact (customer or vendor) in Lexoffice. Use when you need to add a new business contact. Either company or person details must be provided, and at least one role (customer/vendor) must be assigned.
Input parameters
Additional notes about the contact (maximum 1000 characters)
Contact roles - must contain at least one role (customer and/or vendor)
Person contact details - mutually exclusive with company.
Company contact details - mutually exclusive with person.
Version number (must be 0 for new contacts)
Container for billing and shipping addresses.
XRechnung-specific fields for electronic invoicing.
Phone numbers organized by type.
Email addresses organized by type.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_CREATE_CREDIT_NOTETool to create a credit note in Lexoffice. Credit notes are created in draft mode by default; set finalize=true to create with status 'open'. Use when you need to issue a refund or credit for an invoice. Maximum 300 line items per credit note.
Input parameters
Title of the credit note. Organization default is used if omitted.
Additional remarks. Organization default is used if omitted.
Recipient address information. Either contactId must be provided, or name/street/city/zip/countryCode.
Whether the credit note should be archived. Defaults to false.
If true, creates a finalized credit note with status 'open'. If false or omitted, creates a draft credit note. Note: Status cannot be changed via API after creation.
ISO 639-1 language code. Defaults to 'de'.
List of line items in the credit note. Maximum 300 items per credit note.
Total price information with currency specification.
Date of the credit note in RFC 3339/ISO 8601 format (yyyy-MM-ddTHH:mm:ss.SSSXXX).
Introduction text. Organization default is used if omitted. Recommended to include invoice number if related to an invoice.
UUID of the print layout to use. Organization default is used if omitted.
Tax conditions defining tax type and related settings.
Absolute discount amount. Maximum 2 decimal places.
Percentage discount. Maximum 2 decimal places.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_CREATE_DELIVERY_NOTECreate a delivery note in lexoffice. Delivery notes are created in draft mode by default (set finalize=true for open status). Use when shipping goods or providing services and need to document what was delivered without prices/payment terms. Maximum 300 line items allowed per delivery note.
Input parameters
Title of the delivery note. Organization default is used if omitted.
Additional remarks or notes for the delivery note.
Customer address. Either provide contactId for existing contact OR (name + countryCode) for one-time address.
Whether to archive the delivery note immediately after creation. Defaults to false.
If true, creates a finalized delivery note with status 'open'. If false (default), creates in draft mode.
Language for the delivery note.
List of items in the delivery note. Maximum 300 items allowed.
Date of the delivery note in ISO format (yyyy-MM-ddTHH:mm:ss.SSSXXX).
Introduction text shown at the beginning of the delivery note.
Delivery terms and conditions description.
UUID of the print layout template to use. Organization default is used if omitted.
Tax settings for the delivery note.
Shipping details including date and type. Required for delivery notes.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_CREATE_EVENT_SUBSCRIPTIONTool to register a new webhook for Lexoffice events. Use when you need to receive real-time notifications for specific events like invoice creation, contact changes, or payment updates.
Input parameters
The type of event to subscribe to. When this event occurs, a notification will be sent to the callback URL
The HTTPS URL where Lexoffice will send webhook notifications when the specified event occurs
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_CREATE_ORDER_CONFIRMATIONTool to create an Order Confirmation in Lexoffice/Lexware. Order confirmations are always created in draft mode and do not need to be finalized. Use when you need to confirm a customer order with line items, pricing, and shipping details.
Input parameters
Document title/heading
Closing remark or additional notes
Recipient address details
Whether the order confirmation should be archived immediately after creation
Document language (de for German, en for English). Defaults to de if not specified.
List of line items for the order confirmation (maximum 300 items)
Total price details
Document date in RFC 3339/ISO 8601 format (yyyy-MM-ddTHH:mm:ss.SSSXXX)
Introduction text that appears at the beginning of the document
Delivery terms description
UUID of custom print template to use
Tax conditions for the order confirmation
Shipping conditions for the order confirmation
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_CREATE_QUOTATIONTool to create a quotation in Lexoffice. Quotations are created in draft mode by default. Use the finalize parameter to create a finalized quotation with status 'open'. Requires address with either contactId or name+countryCode, line items, total pricing, and tax conditions.
Input parameters
Quotation title
Closing remark for the quotation
Recipient address details
Set to true to create a finalized quotation with status 'open'. If false, quotation is created in draft mode
Quotation language
List of line items in the quotation (maximum 300 items)
Total pricing information
Quotation date in RFC 3339/ISO 8601 format (e.g., '2026-02-13T10:00:00.000+01:00')
Introduction text for the quotation
Delivery terms text
UUID of the print layout to use
Tax conditions
Quotation expiration date in RFC 3339/ISO 8601 format (REQUIRED)
Shipping conditions text
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_CREATE_VOUCHERTool to create a bookkeeping voucher in Lexoffice. Use when you need to create expense receipts, sales invoices, purchase invoices, or other accounting vouchers. The voucher requires line items with amounts, tax rates, and posting category IDs.
Input parameters
Type of voucher to create (e.g., salesinvoice, purchaseinvoice)
Additional remarks or notes for the voucher
Due date for the voucher in ISO 8601 format (YYYY-MM-DD)
Tax calculation type - 'gross' for amounts including tax, 'net' for amounts excluding tax
UUID of the contact (customer or vendor) associated with this voucher
Date of the voucher in ISO 8601 format (YYYY-MM-DD)
Shipping date in ISO 8601 format (YYYY-MM-DD)
List of line items for the voucher with amounts and tax information (minimum 1 item required)
Custom voucher number/reference
Status of the voucher
Total tax amount of the voucher (sum of all item tax amounts)
Total gross amount of the voucher (sum of all item amounts if taxType is gross)
Whether to use a collective contact instead of a specific contact
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_DELETE_ARTICLETool to permanently delete an article by its ID. Returns success confirmation on 204, or raises error if article not found (404).
Input parameters
Unique identifier of the article to delete. Use List Articles or Get Article actions to find valid article IDs.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_DELETE_EVENT_SUBSCRIPTIONTool to delete an event subscription by its ID. Use when you need to remove an existing event subscription from Lexoffice.
Input parameters
The unique identifier of the event subscription to delete
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_DOWNLOAD_FILEDownload a file from lexoffice by its ID. Use this to retrieve PDF documents, images, or XML files associated with invoices, vouchers, or other records. The file format returned depends on the Accept header specified.
Input parameters
The desired content type for the downloaded file. Use this to specify the format you want to receive.
The unique identifier of the file to download. This ID is typically obtained from invoice, voucher, or other document endpoints that return file references.
Optional filename for the downloaded file. If not provided, defaults to 'file_{file_id}' with appropriate extension based on content type.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_ARTICLETool to retrieve an article by ID from Lexoffice. Use when you need to fetch details of a specific article including its price, type, and other metadata.
Input parameters
The unique identifier of the article to retrieve.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_CONTACTTool to retrieve a specific contact by its ID. Use when you need to fetch detailed information about a contact.
Input parameters
Unique ID of the contact to retrieve
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_CREDIT_NOTETool to retrieve a credit note by its UUID from Lexoffice. Use when you need to fetch details of a specific credit note. Credit notes can be in draft or finalized (open) mode.
Input parameters
UUID of the credit note to retrieve
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_CREDIT_NOTE_DOCUMENTTool to render a credit note document (PDF). Use to trigger PDF document file rendering for credit notes in status 'open'. Note: This endpoint only works for credit notes that have been finalized (status 'open'), not for draft credit notes.
Input parameters
The unique identifier (UUID) of the credit note. The credit note must be in 'open' status (not 'draft') for document rendering to work.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_DELIVERY_NOTETool to retrieve a specific delivery note from Lexoffice by its ID. Use when you need to fetch complete details of a delivery note including address, line items, and tax information.
Input parameters
The unique identifier (UUID) of the delivery note to retrieve.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_DELIVERY_NOTE_DOCUMENTTool to render a delivery note document (PDF) and retrieve its file ID. This endpoint triggers the PDF document file rendering and returns a documentFileId that can be used to download the actual PDF. Note: This endpoint is deprecated; consider using GET /v1/delivery-notes/{id}/file instead to directly download the PDF.
Input parameters
Unique identifier (UUID format) of the delivery note to render. The delivery note must be finalized (not in draft status) for the document endpoint to work.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_DUNNINGTool to retrieve a dunning document by its ID. Use when you need to fetch details of a specific dunning from Lexoffice.
Input parameters
The unique identifier of the dunning to retrieve.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_DUNNING_DOCUMENTTool to render and retrieve a dunning document (PDF) reference. Triggers the PDF document file rendering for newly created dunnings. Use when you need to get the document file ID for a specific dunning to download or reference the PDF.
Input parameters
The unique identifier of the dunning for which to render the document. Must be a valid UUID.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_EVENT_SUBSCRIPTIONTool to retrieve a specific event subscription by its ID. Use when you need to get details about an existing event subscription.
Input parameters
The unique identifier of the event subscription to retrieve.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_INVOICETool to retrieve a specific invoice by its UUID. Use when you need to fetch detailed information about an invoice including line items, pricing, and payment terms.
Input parameters
UUID of the invoice to retrieve
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_INVOICE_DOCUMENTTool to render an Invoice Document (PDF) by invoice ID. Use when you need to generate or retrieve the PDF document reference for an invoice that is in 'open' status. This triggers the PDF rendering process and returns a document file ID that can be used to download the actual PDF file.
Input parameters
The unique identifier (UUID) of the invoice to render as PDF. This triggers the PDF document file rendering for invoices in 'open' status.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_ORDER_CONFIRMATIONTool to retrieve a specific order confirmation by its ID. Use when you need to fetch the complete details of an order confirmation including line items, pricing, addresses, and payment terms.
Input parameters
The unique identifier (UUID) of the order confirmation to retrieve.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_ORDER_CONFIRMATION_DOCUMENTTool to render an Order Confirmation Document as PDF. Use when you need to trigger PDF document rendering for a specific order confirmation by providing its ID. Returns a document file reference that can be used to retrieve the rendered PDF.
Input parameters
The unique identifier (UUID) of the order confirmation for which to render the PDF document.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_PAYMENTTool to retrieve payment information for a specific voucher (invoice or credit note) from Lexoffice. Use when you need to check payment status, outstanding amounts, or view payment transaction details for bookkeeping or sales vouchers.
Input parameters
Unique identifier of the voucher (invoice or credit note) to retrieve payment information for
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_PROFILERetrieves the user and company profile information from Lexoffice. Use this action to get account details, enabled features, subscription status, and company information.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_QUOTATIONTool to retrieve a quotation by its ID. Use when you need to fetch details of a specific quotation including line items, pricing, and payment terms.
Input parameters
UUID of the quotation to retrieve
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_QUOTATION_DOCUMENTTool to render a quotation document as a PDF file. Triggers the PDF document file rendering for newly created quotations in status open. Returns a document file ID that can be used to download the PDF.
Input parameters
The unique identifier (UUID) of the quotation for which to render the PDF document.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_GET_VOUCHERTool to retrieve a specific voucher by its UUID. Use when you need to fetch detailed information about vouchers such as sales invoices, credit notes, and other financial documents.
Input parameters
UUID of the voucher to retrieve
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_ARTICLESTool to list articles from Lexoffice using filters and pagination. Use when you need to retrieve articles filtered by articleNumber, gtin, or type (PRODUCT/SERVICE). Supports pagination with page and size parameters.
Input parameters
Filter by Global Trade Item Number (GTIN) of the article.
Specify the page number for pagination (zero-indexed). Default is 0.
Specify the number of articles per page. Maximum is 25.
Specify the sort order for results. Format: 'property,direction' (e.g., 'title,asc' or 'createdDate,desc').
Article type enumeration.
Filter by article number as given by the user.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_CONTACTSTool to retrieve all contacts from Lexoffice with optional filters. Use when you need to list contacts with filtering options for number, email, name, vendor status, or customer status.
Input parameters
Filter by name
Page number for pagination
Number of records per page
Sort field and direction (e.g., 'name,asc' or 'number,desc')
Filter by email address
Filter by contact number
Filter by vendor status
Filter by customer status
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_COUNTRIESTool to retrieve the list of all available countries with tax classifications from Lexoffice. Use when you need to get country information for invoicing, tax calculations, or address validation.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_EVENT_SUBSCRIPTIONSTool to retrieve all event subscriptions for the current access token. Use when you need to inspect configured webhook subscriptions for events.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_PAYMENT_CONDITIONSTool to retrieve list of currently configured payment conditions from Lexoffice. Use when you need to view all payment terms and conditions set up in the organization.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_POSTING_CATEGORIESTool to retrieve the list of posting categories for bookkeeping vouchers (revenue or expense) supported in lexoffice. Use when you need to get available posting categories for creating or updating vouchers.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_PRINT_LAYOUTSTool to retrieve all print layouts for invoices and other documents. Use when you need to list available print layouts that can be referenced when creating sales vouchers (invoices, delivery notes, credit notes, etc.).
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_RECURRING_TEMPLATESTool to retrieve all recurring templates from Lexoffice. Use when you need to list recurring invoice templates with pagination and sorting options.
Input parameters
Page number for pagination (zero-indexed)
Number of records per page
Sort field and direction (e.g., 'title,asc' or 'createdDate,desc')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_VOUCHERLISTTool to retrieve voucherlist from Lexoffice including bookkeeping vouchers (salesinvoices, salescreditnotes), invoices, credit notes, order confirmations, quotations, and delivery notes. Use when you need to list vouchers with filtering options for type, status, dates, or contact.
Input parameters
Page number for pagination (zero-indexed). Default is 0.
Number of vouchers per page. Maximum is 250.
Sort field and direction (e.g., 'voucherNumber,DESC' or 'voucherDate,ASC').
Filter by archived status. Set to true for archived vouchers, false for non-archived.
Filter by contact ID (UUID format).
Filter by voucher type (salesinvoice, invoice, creditnote, etc.).
Filter by created date to (ISO date format: YYYY-MM-DD).
Filter by updated date to (ISO date format: YYYY-MM-DD).
Filter by voucher date to (ISO date format: YYYY-MM-DD).
Filter by specific voucher number.
Filter by voucher status (draft, open, paid, etc.).
Filter by created date from (ISO date format: YYYY-MM-DD).
Filter by updated date from (ISO date format: YYYY-MM-DD).
Filter by voucher date from (ISO date format: YYYY-MM-DD).
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_LIST_VOUCHERSTool to filter vouchers by voucher number from Lexoffice. Use when you need to retrieve vouchers with a specific voucher number.
Input parameters
Page number for pagination, defaults to 0
Number of items per page
Filter vouchers by voucher number (REQUIRED)
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_UPDATE_ARTICLETool to update an existing article in Lexoffice with new data. Use when you need to modify article details such as price, title, type, or other attributes. Requires the article ID and version number for optimistic locking.
Input parameters
The unique identifier (UUID) of the article to update.
Global Trade Item Number (GTIN) for the article.
Additional notes or description for the article.
Type of the article. Must be either 'PRODUCT' for physical goods or 'SERVICE' for services.
Price information including leading price type, gross price, net price, and tax rate.
Title or name of the article.
Version number of the article for optimistic locking. Must match the current version to prevent conflicts.
Unit name for the article (e.g., 'Stunden' for hours, 'Stück' for pieces).
Custom article number for identification.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_UPDATE_CONTACTTool to update an existing contact in lexoffice. Use when modifying customer or vendor information. Requires the contact ID and current version number for optimistic locking.
Input parameters
UUID of the contact to update
Notes about the contact
Contact roles (customer and/or vendor). At least one role is required.
Person contact details. Use this for individual contacts (mutually exclusive with company).
Company contact details. Use this for business contacts (mutually exclusive with person).
Current version number of the contact for optimistic locking. Get this from the contact details before updating.
Contact addresses (billing and/or shipping).
Phone number information.
Email address information.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
LEXOFFICE_UPLOAD_VOUCHER_FILETool to upload and assign files (PDF or image) to a specific voucher in lexoffice. Use when you need to attach supporting documents or receipts to an existing voucher. The file upload is asynchronous and returns HTTP 202 (Accepted) when the file is accepted for processing.
Input parameters
Unique identifier of the voucher to which the file will be uploaded.
File (PDF or image) to upload to the voucher. Only PDF and image files are accepted.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
No publicly available marketplace agent is found using this tool yet. There are 35 agents privately built on Nagent that already use Lexoffice.
Build on Nagent
Connect Lexoffice to any Nagent agent in minutes — no API key management, no boilerplate. Just configure and deploy.
The five questions agent builders ask before adopting a new integration.
Open the External Integrations panel inside Nagent (app.nagent.ai/externalIntegration), find Lexoffice, and click "Connect Now." You'll authenticate with an API key — Nagent handles credential storage and refresh automatically. Once connected, Lexoffice is available to any agent in your workspace.
No. Nagent provides no-code integration for every tool. Once Lexoffice is connected, you configure its 42 actions directly in the agent builder UI — no API calls, no boilerplate, no schema management.
Helix — Nagent's agentic agent builder — lets you drop Lexoffice steps into any workflow visually. Pick an action (e.g., one of those listed above), fill in the inputs (Helix knows the required vs. optional schema for each parameter), and connect it to upstream/downstream steps. Triggers run as the entry point of an agent, so when a Lexoffice event fires, the agent kicks off automatically.
Every Lexoffice action and trigger ships with a fully-typed schema — input parameters with name, type, required flag, and description, plus the output payload shape. The schemas are documented in the sections above. Helix uses these schemas to validate your configuration at build time and to type-check the data flowing between steps.
Yes. While Lexoffice ships with 42 pre-built accounting actions, you can layer custom logic around them inside Helix — pre/post-processing steps, conditional branches, retries, or stitching Lexoffice together with other connected tools. For deeper customization, talk to our team about Nagent's Agentic AI Lab — forward-deployed engineers who build Lexoffice-based workflows tailored to your business.