searchTaxGuides
Search the GoodVAT tax guides for technical tax guides, state laws, and VAT regulations.
LABSCO SUMMARY
Tax questions answered where the invoice is being written.
The two halves fit together: work out whether you owe VAT in a jurisdiction, then check the customer's VAT number is real before you zero-rate the invoice. The VIES check is a live registry lookup, not a format test.
What it is
GoodVat's remote MCP server at https://api.goodvat.com/mcp. It searches a body of tax guidance — UK VAT, EU VAT across member states, US state sales tax, India GST, registration thresholds and invoicing rules — and validates EU VAT numbers in real time against the European Commission's VIES registry.
What you get
- Natural-language answers on VAT rates and rules, sourced from the GoodVat tax guides
- Coverage of UK VAT, EU VAT across all member states, US sales tax state by state, and India GST
- Registration thresholds and invoicing requirements by jurisdiction
- An EU VAT number validated live against the official VIES database
Requirements
A client that supports remote HTTP servers can point straight at https://api.goodvat.com/mcp with nothing installed. Clients limited to stdio use the @goodvat/mcp-server bridge over npx, which needs Node.js 18 or newer. UK VAT number lookup through HMRC is listed as coming soon.
Setup effort
One command — npx @goodvat/mcp-server
USE CASES
01
Deciding what to charge a customer abroad
Ask for the rate and the rule for that jurisdiction and product type, rather than reading a member state's guidance yourself.
02
Zero-rating an invoice safely
Check the customer's EU VAT number against VIES in real time, so the exemption rests on a verified registration.
03
Working out where you have to register
Ask about registration thresholds by state or member state before your sales cross them.
04
Getting the invoice format right
Check the invoicing requirements for the jurisdiction, since what must appear on the document varies by country.
2 tools
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
validateEuVatNumber
Validate an EU VAT number against the official European Commission VIES database.
BEFORE YOU INSTALL
What to know first
Tools you get
2 tools when we connected.
Requires
- npx on PATH
- Node.js >= 18
CONTEXT COST
Light Standing cost
Rated by the size of the 2 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
Connect your client
Add the block to your client, or run the command directly.
Server setup
Configuration file
JSON
{
"mcpServers": {
"goodvat": {
"command": "npx",
"args": [
"@goodvat/mcp-server"
]
}
}
}npx
TERMINAL
npx @goodvat/mcp-serverHosted endpoint
ENDPOINT URL
https://api.goodvat.com/mcpAdd this hosted endpoint to your MCP client.
