{
  "tool_id": "heloc_payment",
  "slug": "heloc-payment-calculator",
  "path": "/heloc-payment-calculator/",
  "mode": "url_api",
  "api_usage": "GET https://aifinhub.io/api/heloc-payment-calculator/?<params>",
  "sample_input": {
    "tool": "heloc_payment",
    "home_value": 500000,
    "existing_mortgage_balance": 300000,
    "ltv_limit_percent": 85,
    "draw_amount": 50000,
    "interest_rate_percent": 8.5,
    "draw_period_years": 10,
    "repayment_period_years": 20
  },
  "input_schema": {
    "type": "object",
    "properties": {
      "tool": { "type": "string" },
      "home_value": { "type": "number" },
      "existing_mortgage_balance": { "type": "number" },
      "ltv_limit_percent": { "type": "number" },
      "draw_amount": { "type": "number" },
      "interest_rate_percent": { "type": "number" },
      "draw_period_years": { "type": "number" },
      "repayment_period_years": { "type": "number" }
    },
    "required": [
      "tool",
      "home_value",
      "existing_mortgage_balance",
      "ltv_limit_percent",
      "draw_amount",
      "interest_rate_percent",
      "draw_period_years",
      "repayment_period_years"
    ]
  },
  "output_schema": {
    "type": "object",
    "properties": {
      "availableCreditLine": { "type": "number" },
      "monthlyPaymentDraw": { "type": "number" },
      "monthlyPaymentRepayment": { "type": "number" },
      "totalInterestPaid": { "type": "number" },
      "warnings": { "type": "array", "items": {} }
    }
  }
}