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Real Estate Investor Toolkit – Rental Property Calculator
x402
Real Estate Investor Toolkit – Rental Property Calculator is a paid API for AI agents from api.jobsproperty-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Calculates key rental property investment metrics (mortgage payment, NOI, cap rate, cash flow, DSCR, gross yield, cash-on-cash return, break-even occupancy, 1% rule) from user-supplied purchase and rent figures.
Price / call$0.002
Success—
StatusUnknown
How this service works
Rental property investment calculator from your numbers: monthly mortgage payment (amortising), net operating income, cap rate, gross rental yield, monthly and annual cash flow, cash-on-cash return, debt service coverage ratio (DSCR), break-even occupancy and the 1% rule check. Any currency. Standard formulas; it does not look up prices or rents.
Output
A JSON object containing: monthly mortgage payment, loan amount, cash invested, effective monthly rent, monthly and annual cash flow, cap rate (%), gross rental yield (%), cash-on-cash return (%), net operating income (annual), DSCR, break-even occupancy (%), whether the property passes the 1% rule (boolean), and a disclaimer note about pre-tax/depreciation basis.
Example use cases
Evaluating a single-family rental
“I'm looking at a $350,000 house I could rent for $2,800/month. Can you calculate the cap rate, cash flow, DSCR, and cash-on-cash return assuming 25% down, a 7% mortgage rate, a 30-year loan, $500/month in expenses, and 5% vacancy?”
Checking the 1% rule on a duplex
“Does this duplex pass the 1% rule? It costs $220,000 and I'd collect $1,900/month in rent. Use a 20% down payment, 6.5% rate, 30-year term, and $300/month operating costs.”
Modeling a UK buy-to-let investment
“Help me model a UK buy-to-let: purchase price £190,000, rent £1,100/month, 25% deposit, 5.5% interest, 25-year term, £200/month costs, and 8% vacancy — give me gross yield, net cash flow, and break-even occupancy.”
Technical details
Endpoint
GEThttps://api.jobsproperty-api.workers.dev/api/realestate/real-estate-investor-toolkit?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need quick, formula-based rental property investment metrics computed from user-supplied numbers, without needing live market data lookups. Ideal for evaluating hypothetical deals, comparing scenarios, or building financial models for any currency. Prefer this over full property listing APIs when the user already knows the price and rent figures and wants computed investment ratios.
Side effects
- Missing required parameters (price or rentMonthly) — likely returns an error or incomplete response
- Non-numeric string values for numeric fields may cause calculation errors
- Extreme or unrealistic inputs (e.g. 0% interest rate, 100% vacancy) may produce mathematically valid but meaningless results
- Service unavailable due to Cloudflare Workers downtime — HTTP 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"dscr": 1.15,
"note": "Before income tax and depreciation; operating costs as you entered them.",
"capRatePct": 6.56,
"loanAmount": 225000,
"cashInvested": 81000,
"cashOnCashPct": 3.23,
"grossYieldPct": 8.8,
"cashFlowAnnual": 2614.16,
"onePercentRule": false,
"cashFlowMonthly": 217.85,
"effectiveMonthlyRent": 2090,
"breakEvenOccupancyPct": 85.1,
"monthlyMortgagePayment": 1422.15,
"netOperatingIncomeAnnual": 19680
}
}Tags
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