{"uid":"cap_BuTWrDcFVDgV3-FfU0Lqb","slug":"x402toll-real-estate-cap-rate-rental-return-calculator-0d774092","name":"x402toll Real Estate Cap Rate & Rental Return Calculator","description":"Rental property returns: cap rate (unleveraged), cash-on-cash (leveraged), gross rent multiplier, and the 1% rule.","url":"https://x402toll.com/v1/realestate/cap-rate","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"downPayment":{"type":"number","default":0},"purchasePrice":{"type":"number"},"annualRentIncome":{"type":"number"},"annualDebtService":{"type":"number","default":0},"annualOperatingExpenses":{"type":"number","default":0}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_IRXbf5oJ3m5Y6pMTGtoZW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"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?","exampleUseCases":null,"resultDescription":"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).","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:41:11.273Z","isFirstParty":false}