> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aris247.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Mortgage Calculator

> Estimates monthly mortgage payments based on property price, down payment, interest rate, and loan term.

# Mortgage Calculator

Estimates monthly mortgage payments based on property price, down payment, interest rate, and loan term.

## MCP tool name

`calculate_mortgage`

## Parameters

<ParamField body="price" type="number" required>Property purchase price.</ParamField>
<ParamField body="downPaymentPercent" type="number" default="20">Down payment as percentage.</ParamField>
<ParamField body="interestRate" type="number" default="6.5">Annual interest rate.</ParamField>
<ParamField body="loanTermYears" type="number" default="30">Loan term in years.</ParamField>
<ParamField body="includePropertyTax" type="boolean" default="true">Include estimated property tax.</ParamField>
<ParamField body="includeInsurance" type="boolean" default="true">Include estimated insurance.</ParamField>

## Example

<Tabs sync={false}>
  <Tab title="Natural language">
    > "What would my monthly payment be on a \$500k home with 10% down?"
  </Tab>

  <Tab title="MCP">
    ```json theme={null}
    {
      "name": "calculate_mortgage",
      "arguments": {
        "price": 500000,
        "downPaymentPercent": 10,
        "interestRate": 6.5,
        "loanTermYears": 30
      }
    }
    ```
  </Tab>
</Tabs>

## Response

Returns a breakdown:

| Field                  | Example     |
| ---------------------- | ----------- |
| Monthly payment (P\&I) | \$2,846     |
| Down payment           | \$50,000    |
| Loan amount            | \$450,000   |
| Est. property tax      | \$520/mo    |
| Est. insurance         | \$150/mo    |
| **Total monthly**      | **\$3,516** |

The tool uses standard amortization formulas. Property tax and insurance are estimated at national averages (1.25% and 0.35% of home value annually) unless overridden.