lexware-mcp
Active·★ 42·MIT·Updated 2026-10-01
The Lexware Office MCP Server is an open-source, self-hostable server designed to integrate the Lexware Office accounting API with LLM agents. It enables agents to read, draft, and manage accounting documents like invoices, vouchers, and contacts.
#MCP Server#Accounting API#LLM Integration#Self-hosted#OAuth#Docker#Financial Automation#API Wrapper
01
Features
01Comprehensive Accounting Data Access: Read profiles, contacts, articles, voucher lists, full documents (invoices, quotations, credit notes), and render documents to PDF.
02Draft and Update Capabilities: Create and update draft invoices, quotations, credit notes, contacts, articles, and bookkeeping vouchers, including file uploads and receipt attachments.
03Optional Finalization of Legally Binding Documents: Enable agents to issue legally binding finalized documents and perform irreversible deletions (with explicit configuration).
04Flexible Authentication Methods: Supports OAuth 2.1 for custom connectors in Claude/ChatGPT web apps and static bearer tokens for Claude Code/Desktop.
05Containerized and Cloud-Ready Deployment: Easily deployable as a Docker container, with specific instructions and considerations for production environments like Google Cloud Run.
02
Compatibility
Docker
Deployment
Verified via docs
Node.js
Runtime
Verified via docs
Lexware Office API
Integration
Verified via docs
Claude
Client
Verified via docs
ChatGPT
Client
Verified via docs
OAuth 2.1
Authentication
Verified via docs
03
Quick start
1
$ git clone https://github.com/marselsel/lexware-mcp
2
$ cd lexware-mcp
3
$ cp .env.example .env
4
$ docker compose up --build
04
Use cases
↳Automated Invoice and Document Processing: Allow LLM agents to automatically read, draft, and manage invoices, quotations, and other financial documents.
↳Smart Financial Data Retrieval and Querying: Agents can intelligently query and retrieve specific accounting information like contact details, article lists, or voucher records.
↳Streamlined Receipt and File Management: Automate the upload and attachment of receipts and files to vouchers, simplifying bookkeeping workflows.
↳Custom LLM Connector for Accounting Platforms: Integrate specialized accounting functionalities directly into LLM platforms like Claude or ChatGPT for financial assistance.
↳Self-hosted Secure Financial API Gateway: Provide a secure, self-controlled gateway for LLM agents to interact with sensitive accounting data.
05
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