2Fin MCP server

• Registry namecom.ai2fin/ai2fin-tax-mcpverified in the MCP registry

The registry name sits under ai2fin.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-20
• Tools10
• Server calls itselfai2fin-tax
• Server version0.6.0
• Protocol version2025-06-18

On 2026-10-20 the server answered initialize and tools/list without a sign-in. First answer in 145 ms.

• Its tools do none of the product's use cases we checked: Upload photo receipts and match them to transactions; Send categorised transactions to Google Sheets or Excel.
• Checked on 5 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 5 so far
• What an agent can do with it0 of 2 use cases
• Answeredmeasuring5 of the 7 daily checks it takes to print a share
• Median first answer148 ms
• Space in an agent's context≈ 5,562 tokensthe definitions of all its tools (10), which an agent carries on every turn
• Tool definitionsA · 100 of 100
• Typed results10 of 10 toolsdeclared outputSchema: results come typed, read once

• Every tool passes all six checks.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• 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…

• 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…

• 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…

• 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…

• 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…

• 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"…

• 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…

• 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…

• 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…

• 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…