Calcuris

io.github.tresor4k由 GitHub 帳號 tresor4k 發布v0.1.1更新於 Oct 24, 2026

Tax calculators for US, UK, Canada, Australia: income tax, property tax, stamp duty.

已驗證STDIO僅桌面金融資料與分析

概覽

AI 產生的概覽

Calcuris 是本地 MCP 伺服器，讓助理計算美國、加拿大、澳洲與英國的所得稅、薪資實拿金額、房產稅與印花稅估算。

可以做什麼
計算美國聯邦與州所得稅，以及依發薪週期計算含 FICA 扣繳的實拿薪資，並依房屋價值與州稅率估算房產稅。計算加拿大聯邦與省級所得稅，含 CPP/QPP 與 EI/QPIP，可選擇比較所有省份。計算澳洲居民所得稅，含 Medicare 稅與 HELP 還款，以及各州印花稅（含首次購屋優惠與外國買家附加稅），可選擇比較所有州。計算英國股利稅，採用 HMRC 疊加法、遞減個人免稅額與年度比較。每次回應都附來源說明與對應線上計算器的參考連結。
適用情境
適合在編列預算、比較各省或各州稅負，或在諮詢專業人士前快速核對數字時，取得美國、加拿大、澳洲或英國的在地化稅務與實拿薪資估算。
執行需求
以本地 stdio 程序執行，通常透過 calcuris-mcp npm 套件以 npx 啟動，因此需要 Node.js。無需 API 金鑰、帳號或網路存取，所有計算都在本地完成。
安裝前請注意
結果僅為參考估算，不構成稅務、法律或財務建議；地方稅、扣除額、抵減與邊緣情況未全部建模。做出財務決定前請向合格稅務專業人士或相關機關核實。此伺服器只做計算，不會讀取或修改你的資料。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Calcuris，將其新增到工作區。
  2. 為需要使用其工具的對話啟用該服務。

Desktop only，透過 STDIO。 STDIO 服務會啟動本機處理程序，因此需要 SourceWeft 桌面主機。

其他 MCP 客戶端

參照 儲存庫 中的啟動說明。

README

calcuris-mcp

[npm version] [license]

An MCP (Model Context Protocol) server that exposes the tax engines behind Calcuris — real 2026 US income tax & paycheck math, US state property tax, Canadian federal + provincial income tax, Australian income tax & stamp duty, and UK dividend tax. No API key, no network calls: every number is computed locally from data sourced from the IRS, Tax Foundation, CRA/Revenu Québec, the ATO and state revenue offices, and HMRC.

Quick Start

Run directly with npx — no install required.

Claude Desktop / Claude Code

Add to your MCP config (claude_desktop_config.json or .mcp.json):

json
{  "mcpServers": {    "calcuris": {      "command": "npx",      "args": ["-y", "calcuris-mcp"]    }  }}

Cursor

Add to .cursor/mcp.json:

json
{  "mcpServers": {    "calcuris": {      "command": "npx",      "args": ["-y", "calcuris-mcp"]    }  }}

Tools

Every response includes a source note and a reference_url pointing to the live calculator on calcuris.com that uses the same engine.

ToolDescriptionExample callExample response (excerpt)
us_income_taxUS federal (2026 IRS brackets, post-OBBBA) + estimated state income tax, with a full progressive bracket breakdown.{ "grossIncome": 95000, "filingStatus": "single", "stateCode": "CA" }{ "federalTax": 12070, "stateTax": 4758.42, "totalTax": 16828.42, "marginalRate": 0.22, "takeHome": 78171.58 }
us_paycheckUS take-home pay per pay period: federal withholding, Social Security, Medicare (+ Additional Medicare), state tax, net pay.{ "payType": "salary", "annualSalary": 80000, "payFrequency": "biweekly", "filingStatus": "single", "stateCode": "TX" }{ "net": { "annual": 65110, "perPeriod": 2504.23 }, "federal": { "annual": 8770 }, "socialSecurity": { "annual": 4960 } }
us_property_taxAnnual/monthly property tax from a home value and either a custom rate or a state's real 2026 effective rate.{ "homeValue": 450000, "stateCode": "TX" }{ "annualTax": 6300, "monthlyTax": 525, "effectiveRatePct": 1.4 }
ca_income_taxCanadian federal + provincial/territorial income tax, CPP/QPP (+ CPP2/QPP2), EI/QPIP, and net take-home pay. Optional compareAllProvinces.{ "grossIncome": 75000, "provinceCode": "ON", "rrspContribution": 0 }{ "federalTax": 8468.74, "provincialTax": 3696.06, "netIncome": 57465.69 }
au_income_taxAustralian resident income tax (2025-26 ATO brackets) + Medicare levy, Medicare Levy Surcharge, LITO offset, HELP/HECS repayment.{ "taxableIncome": 95000, "privateHospitalCover": true, "hasHelpDebt": false }{ "incomeTax": 19288, "medicareLevy": 1900, "totalTax": 21188, "takeHome": 73812 }
au_stamp_dutyAustralian state/territory stamp duty, including first-home-buyer concessions and the foreign purchaser surcharge. Optional compareAllStates.{ "propertyValue": 750000, "stateCode": "NSW", "firstHomeBuyer": false, "foreignResident": false, "principalResidence": true }{ "baseDuty": 28162.5, "totalDuty": 28162.5, "effectiveRate": 3.755 }
uk_dividend_taxUK dividend tax with HMRC's stacking method (dividends sit on top of other income), tapered Personal Allowance, £500 dividend allowance, year-over-year comparison.{ "otherIncome": 40000, "dividends": 15000, "year": "2026/27" }{ "dividendTax": 2741.25, "totalTax": 8227.25, "extraVsPrior": 290 }

Each tool's inputSchema documents every field (types, enums, defaults) and is discoverable via tools/list — see the source in src/index.ts for the full parameter set.

Data sources & freshness

All engines target tax year 2026 (UK: 2026/27, with 2025/26 comparison built in). Rates and brackets are sourced from:

  • US — IRS Rev. Proc. 2025-32 (federal brackets, standard deduction, Child Tax Credit), SSA/IRS FICA wage base and rates, Tax Foundation (state income tax brackets and property tax effective rates), state revenue offices.
  • Canada — CRA (federal brackets, BPA, CPP/CPP2), Revenu Québec (QPP, QPIP, Quebec abatement), provincial finance ministries.
  • Australia — ATO (2025-26 individual tax rates, Medicare levy, LITO, HELP/HECS repayment thresholds), state and territory revenue offices (stamp duty schedules and first-home-buyer concessions).
  • UK — HMRC (Personal Allowance, dividend allowance, Income Tax bands and dividend rates for 2025/26 and 2026/27).

These are the same datasets that power the live calculators:

Disclaimer

Results are estimates for guidance only and do not constitute tax, legal, or financial advice. Tax situations vary by individual (local taxes, deductions, credits, and edge cases are not exhaustively modeled). Always confirm figures with a qualified tax professional or the relevant government authority before making financial decisions.

Development

bash
npm installnpm run build   # compiles src/ → dist/ with tscnpm test        # spawns the built server and runs the smoke test

License

MIT © 2026 tresor4k

來源：README.md，提交 5b770d5

工具

0
SourceWeft 尚未在沙箱中啟動過該軟體包，因此其工具未知。

版本歷史

1
  1. v0.1.1最新Sep 16, 2026

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