The Counterfoil MCP server,
connected in one click.
Read stored EU e-invoice rule notes and the invoice field map. Not a validator. Connect the official Counterfoil MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Counterfoil to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http counterfoil https://einvoicegoblin.com/mcpRun in your terminal, then restart Claude Code.
Counterfoil · https://einvoicegoblin.com/mcp
What your AI can do with Counterfoil
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “get_rule”: Read one stored EU e-invoice rule by id. Returns the stored statement, context, test, plain reading, fix, and source URL. Does not check an.”
“Use “search_rules”: Find stored rules by words, a BT code, or a group. Each hit returns the stored statement, plain reading, fix, and source URL. At most 100 hi.”
“Use “explain_error”: Read a stored rule named in a rule id or a validator message. Returns the stored statement, plain reading, fix, and source URL when a stored.”
“Use “check_invoice”: Read a UBL Invoice XML slice of at most 60000 characters. Returns the business terms that slice writes, the field-map gaps, and one stored n.”
How secure is the Counterfoil MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Counterfoil holds up.
Official endpoint
Operated by Counterfoil (einvoicegoblin.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Counterfoil adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Counterfoil
Choose Counterfoil in the gate directory. No sign-in needed.
Use it anywhere
Counterfoil's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Counterfoil exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
get_rule — Read one stored EU e-invoice rule by id. Returns the stored statement, context, test, plain reading, fix, and source URL. Does not check an
search_rules — Find stored rules by words, a BT code, or a group. Each hit returns the stored statement, plain reading, fix, and source URL. At most 100 hi
explain_error — Read a stored rule named in a rule id or a validator message. Returns the stored statement, plain reading, fix, and source URL when a stored
check_invoice — Read a UBL Invoice XML slice of at most 60000 characters. Returns the business terms that slice writes, the field-map gaps, and one stored n
Who runs the Counterfoil MCP server?
The Counterfoil MCP server at a glance
https://einvoicegoblin.com/mcpQuestions, answered
Is there an official Counterfoil MCP server?
Yes — Counterfoil operates its own remote MCP server at einvoicegoblin.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Counterfoil to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Counterfoil in the directory. No account or sign-in is needed. From then on, Counterfoil's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Counterfoil runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Counterfoil MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Counterfoil in minutes. No credit card required.
Connect more than just Counterfoil
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Counterfoil in: Claude · Claude Code · ChatGPT · Cursor · VS Code