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x402toll Real Estate Cap Rate & Rental Return Calculator
x402
x402toll Real Estate Cap Rate & Rental Return Calculator is a paid API for AI agents from x402toll.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Computes key rental property return metrics — cap rate, cash-on-cash return, gross rent multiplier, and the 1% rule — given purchase price, rent, expenses, and optional financing details.
Price / call$0.05
Success—
StatusUnknown
How this service works
Rental property returns: cap rate (unleveraged), cash-on-cash (leveraged), gross rent multiplier, and the 1% rule.
Output
Returns four rental property return metrics: cap rate (unleveraged NOI/price), cash-on-cash return (leveraged annual cash flow vs. down payment), gross rent multiplier (price/annual rent), and whether the property satisfies the 1% rule (monthly rent ≥ 1% of purchase price).
Example use cases
Example prompt
“I'm looking at a rental property listed at $350,000 — it brings in $28,800 a year in rent, has $6,000 in annual operating expenses, and I'd put $70,000 down with $18,000 in annual mortgage payments. Can you calculate the cap rate, cash-on-cash return, gross rent multiplier, and tell me if it passes the 1% rule?”
Technical details
Endpoint
POSThttps://x402toll.com/v1/realestate/cap-rateWhen to prefer
Use this endpoint when you need a quick, multi-metric rental property analysis in a single call — especially when you want both unleveraged (cap rate, GRM, 1% rule) and leveraged (cash-on-cash) metrics together. Ideal for pre-screening investment properties before deeper due diligence. Prefer over manual spreadsheet calculations or generic financial APIs that don't bundle these four real-estate-specific metrics.
Side effects
- Missing required field purchasePrice returns 400 error
- Missing required field annualRentIncome returns 400 error
- Zero or negative purchasePrice causes division-by-zero or validation error
- Payment not included or insufficient USDC results in 402 Payment Required
- Malformed JSON body returns 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| downPayment | number | |
| purchasePrice | number | |
| annualRentIncome | number | |
| annualDebtService | number | |
| annualOperatingExpenses | number |
Tags
x402
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