MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Payments & trading

AI2Fin (2Fin) Tax MCP

Free public tax MCP: GST/VAT, income, company & capital-gains tax for 50+ countries, source-cited.

Checks passed
13 / 22

1 failed · 8 not measured

Median response
108 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
10

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
312

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 108 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-06-18, serverInfo.name ai2fin-tax.

  • Pass
    Lists tools

    tools/list returned 10 tools.

  • Pass
    Current protocol

    Negotiated 2025-06-18. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 108 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 108 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    44 of 44 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Fail
    Website matches publisher

    The website host does not match the reverse-domain namespace.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-07-03T08:10:59.486074Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using AI2Fin (2Fin) Tax MCP

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http ai2fin-2fin-tax-mcp https://taxmcp.ai2fin.com

Capabilities

Tools 10

cgt_estimate

Estimate capital gains tax on one sale of shares or property by a resident individual, for 71 countries (AE, AR, AT, AU, BE, BG, BR, CA, CH, CL, CN, CO, CY, CZ, DE, DK, EE, EG, ES, FI, FR, GB, GH, GR, GT, HK, HR, HU, ID, IE, IL, IN, IS, IT, JM, JP, KE, KR, LI, LK, LT, LU, LV, MT, MU, MX, MY, NG, NL, NO, NZ, PH, PK, PL, PT, QA, RO, RS, RU, SA, SE, SG, SI, SK, TR, TW, TZ, UA, UG, US, ZA). Where the country's rule can be computed the answer is a figure; where it depends on facts the engine cannot model, the answer is the rule itself (rate, holding period, annual exemption, main residence) with the reason — never a borrowed number. Any other country returns 'not covered'. Pass income (other taxable income for the year) where the gain is taxed at marginal rates, and heldMoreThan12Months or holdingMonths where the holding period matters (the Australian 50% discount, the US long-term rate). capitalLosses apply before any discount. Finland (FI) adds its own detail: the better of the actual cost or the deemed acquisition cost (hankintameno-olettama: 20% of the price, 40% after 10 years), the 1 000 € small-disposals rule and 30%/34% capital income tax — pass yearsHeld, and otherCapitalIncome if there is any; costBase may be omitted there. Each answer cites the capital-gains source and date for that country — not the GST/VAT one. For pay without an asset sale use income_tax_estimate. Non-resident rules are out of scope. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered
company_tax_estimate

Estimate company/corporate income tax on an annual profit at the headline rate for 139 countries (28 verified against the national authority; the rest are indicative OECD headline rates, and the answer says "not verified — confirm with" the authority). Use it for company profit questions; individuals belong to income_tax_estimate. smallBusiness applies the small-company rate only where it covers all of the company's income (AU, IN); where the reduced rate is a profit band (UK small profits, the Canadian small-business deduction and similar) it is noted, not applied. Headline-rate arithmetic only: state and provincial tax, surcharges and marginal relief are named in the note, not computed. Each answer cites the company-tax source and date — not the GST/VAT one. A negative profit returns an explanation (losses carry forward), never a negative tax; a country not covered says so. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered
compare_countries

Compare headline tax rates — GST/VAT, top personal income tax and company tax — across several countries at once. Use it to shortlist or contrast jurisdictions (relocation, expansion, pricing); for one country's full detail use tax_rate_lookup, and to apply a rate to an amount use compute_gst_vat. Pass income to add, per country, the income_tax_estimate result for that income (income tax, total tax, take-home, average rate, with its own source). The same number is read in each country's own currency and is not converted between currencies. Income tax is estimated for 57 countries; any other row reports 'not covered' for that part and still shows its headline rates. Codes the dataset does not cover are reported back in unmatchedCodes rather than silently dropped; every matched row cites its national tax authority. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered
compute_gst_vat

Add or remove a country's GST/VAT — or its other national consumption tax, such as Japan's consumption tax or Malaysia's SST — on a monetary amount, returning the net / tax / gross split. Use it to convert between tax-exclusive and tax-inclusive prices (invoices, quotes, receipts); for the rates themselves use tax_rate_lookup. Pure arithmetic on the current standard rate, rounded to 2 decimals, in the local currency. Pass region for a state or provincial rate (CA, US): in Canada that is GST plus the provincial tax, in the US the state sales tax. A country with no national rate (the US without a region, or a country with no consumption tax) returns an explanatory error instead of a wrong number. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered
income_tax_estimate

Estimate personal income tax and take-home pay from gross annual income for 57 countries, using the engine's effective-dated brackets with each country's own levies, offsets and social contributions as its scheme defines them. Covered: AE, AR, AT, AU, BD, BE, BR, CA, CH, CL, CN, CO, CR, CZ, DE, DK, EE, EG, ES, FI, FR, GB, GR, GT, HU, ID, IE, IL, IN, IS, IT, JM, JP, KE, KR, LU, LV, MX, MY, NG, NL, NO, NZ, PH, PK, PL, PT, SA, SE, SG, SI, SK, TH, TR, US, VN, ZA. Any other country returns 'not covered' rather than a guess; its headline rates live in tax_rate_lookup. Pass region for a state, province or nation where the scheme has one (CA: 13 regions, e.g. AB, BC, MB; ES: 3 regions, e.g. AN, CT, MD; GB: SCT (Scotland); US: 51 regions, e.g. AK, AL, AR); without it the answer is national only and says so in its assumptions. For Finland pass `municipality` (Finnish or Swedish name, e.g. 'Tampere' or 'Helsingfors') for that municipality's own rate — otherwise the national average is used and the answer says so — plus `church` for a parish member and `age` where it changes the contributions; Finland also returns the tax-card rate (veroprosentti). The figure is for EMPLOYMENT income (salary or wages) wherever a country applies an employee-only item — India's salary standard deduction, UK Class 1 National Insurance, US FICA — and the first assumption says so. For freelance or self-employed profit pass incomeType "self-employed": India and the UK compute it, countries where it is taxed the same answer it, and the rest refuse with what differs rather than return a salaried figure. This is a resident-individual estimate, not a filing calculation: relay the assumptions it returns. Each answer cites the income-tax source and date for that country — not the GST/VAT one. For AU HELP/HECS use student_loan_repayment. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered
student_loan_repayment

Estimate the compulsory annual study or training loan repayment (HELP, HECS, VSL, SFSS, SSL, AASL) for an Australian resident from their repayment income, using the marginal system introduced in 2025-26 with effective-dated thresholds that roll over each financial year. Use it for "how much HELP/HECS will I repay" questions in AU; it does not cover the loan balance, indexation or voluntary repayments, and applies to Australia only. Repayment income is broader than taxable income — it adds back reportable super contributions, reportable fringe benefits, net investment loss and exempt foreign income; pass that combined figure. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered
superannuation_estimate

Estimate Australian superannuation for an employee: the compulsory Superannuation Guarantee contribution (12% from 2025-26), concessional (before-tax) contributions cap usage, the 15% in-fund contributions tax, and the Division 293 high-earner surcharge — all effective-dated so a future budget year is picked automatically. Use it for "how much super will I get / can I contribute / will I be taxed" questions in AU; it does not model fund fees, insurance, investment returns, non-concessional contributions or carry-forward caps, and applies to Australia only. Salary sacrifice reduces salary; a personal deductible contribution is a deduction against total assessable income. Both add to the concessional total. The Division 293 threshold is tested against taxable income plus LOW-TAX contributions — that is, concessional contributions excluding any excess over the cap, since the excess is already counted inside taxable income. ordinaryEarnings therefore counts toward the threshold; pass otherTaxableIncome only for income beyond salary, such as investment or business income. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered
tax_facts

Sourced facts about a country's tax system: when and why its GST/VAT was introduced, what it replaced, and memorable, true stories (court cases, elections, odd rulings) — each fact linked to its own source. Omit country for a primer on what a consumption tax is plus famous tax stories from history. Pass topic to keep only facts about one tax (each fact lists its topics). Use it for background, explainers, teaching or a conversation opener; for any rate or amount use tax_rate_lookup, compute_gst_vat or the estimate tools, because facts are dated stories, not live figures. Countries without curated facts return the list of countries that have them rather than an invented one.

Discovered
tax_rate_as_of

Look up the GST/VAT standard rate that applied in a country ON A GIVEN DATE, rather than today's rate. Use it when reconciling or amending a past transaction, invoice or return — several countries changed rate recently (Estonia twice since 2024, Finland, Kazakhstan, Russia, Romania, Slovakia, Ghana, Israel, Ecuador), so the rate today is not the rate that applied then. For the current rate use tax_rate_lookup. The answer states plainly whether a real dated change backs it or whether only the present rate is on record. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered
tax_rate_lookup

Look up one country's headline tax rates: GST/VAT standard and reduced rates, top personal income tax rate, and company tax rate — national rates for 193 countries, plus state and provincial sales tax for CA and US when you pass region. Use it for a single country; to see several countries side by side use compare_countries, and to apply GST/VAT to an amount use compute_gst_vat. Rates come from a fixed dataset verified against the national tax authority — every answer names its source and verification date, and an unsupported country returns a clear error rather than a guess. Results may include one sourced background fact (relatedFact); the figures do not depend on it.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected108 ms10