Live integrationAI assistants · AI assistant from Anthropic
Tax answers you can trust in Claude
Connect Claude to GoodVat’s MCP server. Ask about VAT, GST and sales tax in plain words and get current, sourced answers — plus live EU VAT number checks. Free, with no account needed.
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- Included in every plan
- 140+ countries
- Filing by local partners
ClaudeWhat Claude can do with GoodVat
Connected- VAT and GST rates Available
- US sales tax Available
- Registration rules Available
- EU VAT numbers Available
- Invoicing rules Available
What Claude gains with GoodVat
Answers, not guesses
Claude looks up VAT, GST and US sales tax rules in GoodVat’s knowledge base instead of relying on what the model remembers.
Live VAT number checks
Ask Claude to verify an EU VAT number and it checks the official VIES register on the spot.
Nothing new to learn
Keep working in Claude as you do today. GoodVat is there whenever a question touches tax.
How it works
How Claude connects to GoodVat
- 01
Copy the server address
GoodVat’s MCP server lives at https://api.goodvat.com/mcp — free, no account or API key.
- 02
Add it to Claude
Add GoodVat as a custom connector in Claude using the server address. It works in Claude on the web, Claude Desktop and Claude Code.
- 03
Ask away
Ask tax questions as normal. Claude pulls answers from GoodVat instead of guessing.
What Claude can do with GoodVat
| Ask about | What GoodVat gives it |
|---|---|
| VAT and GST rates | Current rates by country and product type — standard, reduced and zero. |
| US sales tax | State rules, economic nexus thresholds and what counts toward them. |
| Registration rules | When you need to register, and how — OSS, IOSS and local schemes. |
| EU VAT numbers | A live check against the EU’s VIES register. |
| Invoicing rules | What a compliant invoice needs to show in each country. |
Who uses GoodVat with Claude
Founders with a quick question
“Do I need to register for VAT in Germany?” — answered in Claude, with sources.
Developers building tax logic
Look up the right rule while you build, instead of hard-coding a rate that changes next year.
Finance and support teams
Check a customer’s VAT number or a country’s rate without leaving Claude.
How tax answers work in Claude
- What Claude does on its own
- Claude reasons through tax questions well, but its knowledge of rates and thresholds comes from training data with a cut-off date.
- Where it falls short
- Thresholds and rates change every year, and without a live source Claude can’t be sure a figure is still current or check an EU VAT number.
- What GoodVat adds
- GoodVat’s MCP server gives Claude current VAT, GST and US sales tax rules with sources, plus live EU VAT number checks. When you’re ready to collect and file, GoodVat’s compliance product takes over.
FAQ · Claude
Questions, answered
Every business is different. If your question isn’t here, ask a real person.
How do I connect Claude to GoodVat?
Add GoodVat as a custom connector in Claude using the server address. It works in Claude on the web, Claude Desktop and Claude Code. The server address is https://api.goodvat.com/mcp, and our setup guide walks through it step by step.
Is it free?
Yes. The GoodVat MCP server is free to use, with no account or API key needed.
What can Claude look up through GoodVat?
VAT and GST rates, US sales tax rules and nexus thresholds, registration rules and invoicing requirements — plus live EU VAT number checks against the official VIES register.
Does this replace an accountant?
No. It gives you fast, sourced answers so you understand your obligations. When you need registrations and filings handled, GoodVat’s compliance product and our local partners do that work.
Ready to automate tax with Claude?
Tell us about your business and we’ll get you connected — a real person replies within one business day.
