The Adfin MCP server provides a Claude Desktop integration that exposes Adfin's payments, invoicing, and accounting capabilities through a dedicated MCP. By configuring Claude to run main_adfin_mcp.py via UV, users can interact with Adfin services directly from the AI assistant. The Adfin MCP server authenticates using environment variables ADFIN_EMAIL and ADFIN_PASSWORD, ensuring secure access to the Adfin API. When Claude Desktop is launched, it installs and makes the latest Adfin API tools and documentation available to the assistant, enabling up-to-date functionality. The setup supports two MCP endpoints: Adfin (main_adfin_mcp.py) for core operations and a filesystem MCP (filesystem.py) for uploading multiple invoices from a folder. Typical workflows demonstrated include checking credit control status, creating new invoices (specifying amount, recipient, due date and contact email), and bulk-upload of PDF invoices from a directory. The MCP framework requires Python 3.10+ and UV installation; upon first use, the required packages are downloaded. This integration is intended for finance teams and developers who want to automate payments, invoicing, and document handling within Claude.