Free · For agents & assistants

Connect your assistant to live tax rates

A free Model Context Protocol server — your assistant can look up, compute and compare tax for 50 countries, the same rates Fin uses behind the comparison tool.

You ask

“What’s the GST on $4,400 in Australia?”

GST is $400 — the price before GST is $4,000, total $4,400.

You ask

“What’s my take-home on $90,000 in Australia?”

About $70,412 — $17,788 income tax plus a $1,800 Medicare levy (2025-26).

You ask

“CGT on a $20,000 crypto gain held over a year, $90k salary?”

About $3,200 — the 50% discount halves the gain to $10,000, taxed at your marginal rate.

The tools your assistant gets

tax_rate_lookup

A country’s GST/VAT, income and company tax rates.

compute_gst_vat

Add or remove a country’s GST/VAT on any amount.

compare_countries

Compare tax across several countries at once.

income_tax_estimate

Income tax and take-home pay for Australia or New Zealand.

company_tax_estimate

Corporate tax on a profit — AU, US, UK, Canada and India.

cgt_estimate

Australian capital gains tax, with the 50% discount.

Income-tax, company-tax and CGT estimates cover the source-verified countries (AU/NZ income; AU/US/UK/CA/IN company; AU CGT). General information, not tax advice.

This page · Public

Tax MCP

Tax rates and calculators for any country — no login, no account data. For everyone.

https://taxmcp.ai2fin.com

Your account

2Fin app MCP

Connect an assistant to your own 2Fin data — transactions, categories and live tax position. Asks you to sign in.

https://api.ai2fin.com/mcp

Connect in 3 steps

  1. 1

    Copy the endpoint

    https://taxmcp.ai2fin.com

  2. 2

    Add it as a connector

    In any MCP-compatible assistant — Claude, ChatGPT, Cursor or your own agent — add a custom connector and paste the endpoint. No API key.

  3. 3

    Just ask

    Ask your assistant “what’s the GST on $4,400 in Australia?” or “compare VAT in Germany, France and the UK” — it calls the tool and answers.

# try it from a terminal
curl -s https://taxmcp.ai2fin.com -X POST -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"compute_gst_vat","arguments":{"country":"AU","amount":100}}}'

Common questions

What is the Tax MCP?

A free Model Context Protocol server. It lets an AI assistant call tax tools directly — look up GST/VAT, income and company tax rates for 50 countries, add or remove GST/VAT on an amount, and compare countries.

How do I connect it to my assistant?

Add the endpoint (https://taxmcp.ai2fin.com) as a custom MCP connector in any MCP-compatible assistant — Claude, ChatGPT, Cursor, or your own agent. There is no login or API key — it is public.

Is my financial data involved?

No. This is the public tax server — Fin computes over published rate data only and stores nothing, with no login. It is completely separate from your 2Fin account. To connect an assistant to your OWN data, use the authenticated app server below.

Tax MCP or the 2Fin app MCP — which do I want?

Use this public Tax MCP (https://taxmcp.ai2fin.com) for rates and calculators — GST/VAT, income, company and capital-gains tax for any country, no sign-in. Use the 2Fin app MCP (https://api.ai2fin.com/mcp) when you want your assistant to work with your own account: your real transactions, categories and live tax position (it asks you to sign in first).

What can I ask it?

Things like “add GST to $200 in New Zealand”, “what’s the VAT rate in Ireland?”, or “compare GST and income tax for Singapore, Australia and the UK”.

Is it free?

Yes — completely free, no sign-up. The same rates power the free calculators and comparison tool on this site.

Prefer to just click?

The same tools run right in your browser — no setup.

Open the comparison tool →

Explore the tax tools

All tools →

Compare tax by country

Put countries side by side — rates, local names, structure and filing.

Tax rates by country

Every standard and reduced GST/VAT rate, with income and company tax, in one table.

GST Calculator

Add or remove GST/VAT on any amount, with the formula shown every time.

Income Tax & Take-Home

Your income tax, Medicare levy and take-home pay on any salary.

UK Income Tax & Take-Home

Your UK income tax, National Insurance and take-home pay — England, Wales & NI rates.

India Income Tax & Take-Home

Your India income tax on the new regime — the ₹75k standard deduction, the ₹12L rebate and 4% cess, with take-home.

Capital Gains Tax (AU)

Sold an asset? Fin works out your CGT — the 50% discount and your losses, at your marginal rate.

Crypto Tax (AU)

Sold or swapped crypto? Fin works out the CGT — same 50% discount, at your marginal rate.

Company Tax Calculator

See the tax on your company’s profit across AU, UK, US, Canada and India — every rate sourced.

Tax facts

The weird, wonderful and true history of GST and VAT — every fact sourced.