US Mortgage Calculator

com.usmortgagecalc由 usmortgagecalc.com 發布官方發布者v1.0.1更新於 Oct 24, 2026

US mortgage calculator and amortization API with 50-state property tax, PMI, and affordability data.

已驗證Streamable HTTP可網頁執行金融資料與分析

概覽

AI 產生的概覽

一個遠端美國房貸計算器,讓助理計算月付、攤還、房貸保險、房產稅、可負擔額度、再融資以及租屋與購屋的比較。

可以做什麼
計算美國房貸的完整每月住房成本、終身總額與還清時間,可選用某一州的平均房產稅率。按月或按年列出攤還明細,並顯示額外償還本金能提前多久還清。估算傳統、FHA、VA 等各類貸款的房貸保險,包括預付保費與取消時點。計算房產稅、依 28/36 比率得出的可負擔上限、再融資回本時間與過戶費用。比較二到五個貸款方案,分別按月付與終身成本排序,並以淨資產比較租屋與購屋。查詢各州房產稅規則,列出各州平均稅率與房價中位數。
適用情境
適合回答美國購屋相關問題:估算月付、比較貸款方案、房貸保險與稅費、購屋者可負擔的房價、是否值得再融資,以及租屋與購屋的取捨。
執行需求
遠端 streamable HTTP 端點;未宣告任何套件、帳號、API 金鑰或環境變數。需要能存取提供方的端點。
安裝前請注意
結果是依輸入與州平均值估算,租屋與購屋的結果被說明為對升值假設高度敏感。未宣告身分驗證,請勿提交不願提供給第三方服務的個人財務資訊。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 US Mortgage Calculator,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。

Web executable,透過 Streamable HTTP。 遠端服務在工作區中設定後即可從網頁執行環境執行。

交給代理程式安裝

把這段提示詞貼上到 Claude Code、Codex、Cursor 等代理程式,或 SourceWeft 對話中。代理程式會讀取該伺服器的安裝指南,先向你展示發布者、端點和登入方式,經你同意後再把它新增到你的客戶端。金鑰不會寫進任何命令。

閱讀 https://sourceweft.com/mcp/com.usmortgagecalc%2Fmortgage/install.md,並按其中說明把這個 MCP 伺服器接入我的客戶端。修改任何設定之前,先告訴我它的發布者、端點和登入方式,等我確認。不要把 API 金鑰寫進命令或我會提交的檔案;問我金鑰應從哪裡取得。

檢視代理程式所依據的安裝指南

其他 MCP 客戶端

把它新增到你客戶端的 mcpServers 設定中。

{
  "mcpServers": {
    "us-mortgage-calculator": {
      "type": "http",
      "url": "https://www.usmortgagecalc.com/mcp"
    }
  }
}

工具

11

calculate_mortgage

Calculate a monthly mortgage payment

Full monthly housing cost for a US mortgage: principal and interest, property tax, homeowners insurance, mortgage insurance and HOA dues, plus lifetime totals and payoff timing. Pass a state name to use that state's average property tax rate. This is the right tool for 'what would my payment be on a $400,000 house'.

輸入參數stateloanTypehomePrice必填monthlyHoaloanTermYearsannualInsurancedownPaymentPercentmonthlyExtraPrincipalpropertyTaxRatePercentannualInterestRatePercent

calculate_amortization

Build an amortization schedule

Payment-by-payment breakdown of how a loan is repaid, showing the split between principal and interest and the falling balance. Use granularity 'monthly' for the first years in detail, 'yearly' for a whole-term overview. Also reports how much sooner extra principal pays the loan off.

輸入參數stateloanTypehomePrice必填monthlyHoagranularityloanTermYearsannualInsurancedownPaymentPercentmonthlyExtraPrincipalpropertyTaxRatePercentannualInterestRatePercent

calculate_pmi

Calculate mortgage insurance

Mortgage insurance for any US loan programme, including the upfront charges most calculators omit. Conventional: monthly PMI and the month it cancels at 80% and 78% loan-to-value. FHA: the 1.75% upfront premium, monthly MIP, and whether it runs for the life of the loan or ends after 11 years. VA: the funding fee, tiered by down payment and prior use, and waivers. USDA: guarantee and annual fees.

輸入參數loanTypehomePrice必填creditScoreloanTermYearsvaSubsequentUsedownPaymentPercentmonthlyExtraPrincipalvaExemptFromFundingFeeannualInterestRatePercent

calculate_property_tax

Estimate property tax

Annual and monthly property tax for a home, using a state's average effective rate. Also returns how that state ranks nationally and how its rate compares with the national average. For the mechanics behind the number — assessment basis, caps, exemptions, appeal deadlines — use get_state_mortgage_rules.

輸入參數state必填homePrice必填

calculate_affordability

Work out how much house someone can afford

Maximum affordable home price from income, existing debt payments and available down payment, using the 28/36 qualifying ratios. Reports which of the two ratios is the binding constraint, which is the actionable part: a buyer limited by the back-end ratio can raise their budget by clearing debt, one limited by the front-end ratio cannot.

輸入參數statemonthlyHoaloanTermYearsannualInsuranceannualGrossIncome必填downPaymentAmount必填backEndRatioPercentmonthlyDebtPaymentsfrontEndRatioPercentpropertyTaxRatePercentannualInterestRatePercent

calculate_refinance

Evaluate a refinance

Whether refinancing is worth it: the new payment, monthly saving, and how many months it takes to recover closing costs. Also compares lifetime interest, which catches the common trap where a lower payment costs more overall because the term was reset.

輸入參數closingCosts必填newTermYearscurrentBalance必填financeClosingCostsnewAnnualRatePercent必填currentAnnualRatePercent必填currentRemainingTermMonths必填

estimate_closing_costs

Itemise closing costs

Line-by-line buyer closing costs — lender fees, title, appraisal, transfer taxes, prepaid escrow — plus total cash needed at the table including the down payment. Marks which items are worth shopping for and which are fixed by the county, and adds the FHA upfront premium, VA funding fee or USDA guarantee fee where they apply.

輸入參數stateloanTypehomePrice必填escrowMonthsannualInsurancevaSubsequentUsedownPaymentPercenttransferTaxPercentpropertyTaxRatePercentvaExemptFromFundingFee

calculate_rent_vs_buy

Compare renting with buying

Compares renting and buying on net wealth rather than on monthly payment, accounting for equity, appreciation, maintenance, selling costs, and the return a renter earns on money not spent on a down payment. Returns the year buying overtakes renting. The result is highly sensitive to the appreciation and investment-return assumptions, which are returned alongside it.

輸入參數statehomePrice必填monthlyHoamonthlyRent必填loanTermYearsyearsToCompareannualInsurancedownPaymentPercentsellingCostPercentpropertyTaxRatePercentinvestmentReturnPercentannualMaintenancePercent另有 3 個

compare_loans

Compare loan options side by side

Compares two to five loan scenarios and reports which is cheapest by monthly payment and which by lifetime cost, separately, because they frequently are not the same loan. Use for 15-year versus 30-year, FHA versus conventional, competing lender quotes, or with and without discount points.

輸入參數scenarios必填

get_state_mortgage_rules

Look up a state's property tax rules

How property tax actually works in one state: how assessed value is derived, any statutory growth cap, the billing cycle, named exemptions such as homestead, the filing deadline, who hears appeals and the window to file, notable county variation, and a link to the state's own tax authority. Use this when the question is about mechanics or deadlines rather than a dollar amount.

輸入參數state必填

list_states

List all 50 states with property tax rates

Every US state with its average effective property tax rate, median home value and estimated annual tax. Sortable, so it answers 'which states have the highest property taxes' directly. Call this to discover valid state names for the other tools.

輸入參數limitordersortBy

版本歷史

1
  1. v1.0.1最新Sep 16, 2026

評分

已滿足適用檢查項的 83%

該評分衡量此收錄條目的完整程度,依據註冊中心條目、端點與公開來源計算得出。它不是對伺服器本身的評價,也不表示伺服器安全或目前可用:可連通性是帶日期的檢查結果,評分也不包含安裝量或使用者評價。

  • 近 30 天內可連通必需25 分
  • 已宣告認證方式必需10 分
  • 已列出工具必需15 分
  • 描述必需15 分
  • 圖示10 分
  • 文件15 分

    請宣告包含 README 的 GitHub 儲存庫,或在 OAuth 受保護資源後設資料中提供 resource_documentation。

  • 授權條款不適用

    託管服務按其提供方的條款使用,因此這裡不要求授權條款。此檢查項不計入百分比。