US Mortgage Calculator

com.usmortgagecalc由 usmortgagecalc.com 发布官方发布者v1.0.1更新于 Oct 24, 2026

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

已验证Streamable HTTP可网页运行金融数据与分析

概览

AI 生成的概览

一个远程美国房贷计算器,让助手计算月供、摊还、房贷保险、房产税、可负担额度、再融资以及租房与买房的比较。

可以做什么
计算美国房贷的完整月度住房成本、终身总额和还清时间,可选用某州的平均房产税率。按月或按年列出摊还明细,并显示额外偿还本金能提前多久还清。估算常规、FHA、VA 等各类贷款的房贷保险,包括预付保费和取消时点。计算房产税、按 28/36 比率得出的可负担上限、再融资回本时间和过户费用。比较两到五个贷款方案,分别按月供和终身成本排序,并按净资产比较租房与买房。查询各州房产税规则,列出各州平均税率和房价中位数。
适用场景
适合回答美国购房相关问题:估算月供、比较贷款方案、房贷保险与税费、购房者可负担的房价、是否值得再融资,以及租房与买房的取舍。
运行要求
远程 streamable HTTP 端点;未声明任何软件包、账户、API 密钥或环境变量。需要能访问提供方的端点。
安装前请注意
结果基于输入和州平均值估算,租房与买房的结果被说明为对升值假设高度敏感。未声明身份验证,请勿提交不愿提供给第三方服务的个人财务信息。

安装

在 SourceWeft 中

  1. 打开 控制台中的 US Mortgage Calculator,将其添加到工作区。
  2. 为需要使用其工具的对话启用该服务。

Web executable,通过 Streamable HTTP。 远程服务在工作区中配置后即可从网页运行时运行。

交给智能体安装

把这段提示词粘贴到 Claude Code、Codex、Cursor 等智能体,或 SourceWeft 对话中。智能体会读取该服务器的安装指南,先向你展示发布者、端点和登录方式,经你同意后再把它添加到你的客户端。密钥不会写进任何命令。

阅读 https://sourceweft.com/mcp/com.usmortgagecalc%2Fmortgage/install.md,并按其中说明把这个 MCP 服务器接入我的客户端。修改任何配置之前,先告诉我它的发布者、端点和登录方式,等我确认。不要把 API 密钥写进命令或我会提交的文件;问我密钥应从哪里获取。

查看智能体所依据的安装指南

其他 MCP 客户端

把它添加到你客户端的 mcpServers 配置中。

{
  "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'.

输入参数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.

输入参数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.

输入参数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.

输入参数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.

输入参数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.

输入参数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.

输入参数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.

输入参数statehomePrice必填monthlyHoamonthlyRent必填loanTermYearsyearsToCompareannualInsurancedownPaymentPercentsellingCostPercentpropertyTaxRatePercentinvestmentReturnPercentannualMaintenancePercent另有 3 个

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.

输入参数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.

输入参数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.

输入参数limitordersortBy

版本历史

1
  1. v1.0.1最新Sep 16, 2026

评分

已满足适用检查项的 83%

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  • 描述必需15 分
  • 图标10 分
  • 文档15 分

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