Counterfoil

Overview

Counterfoil is a Model Context Protocol server that lets you read stored EU e-invoice rule notes and access the invoice field map. It's designed to help you understand e-invoice structures and requirements, though it does not perform validation itself. By connecting to your MCP client, Counterfoil exposes these resources as tools you can call directly from Claude, Cursor, VS Code, or any compatible assistant.

Counterfoil runs as a remote hosted service at https://einvoicegoblin.com/mcp with no authentication required and nothing to install on your machine. The latest release is v0.45.0. You connect by pointing your MCP client to the endpoint and are ready to go immediately.

Counterfoil is listed in the Finance category and works with Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and other MCP clients. If you maintain this server, claim your listing on mcp.site to verify ownership and keep the information up to date.

Installation

Settings → Connectors → Add custom connector
Name: Counterfoil
URL:  https://einvoicegoblin.com/mcp