Rental Data APIs
Rental data APIs estimate what a property should rent for, and each covers one market. Rentometer is a paid API returning mean, median and percentile rents for a US address with nearby comps, and RentCast pairs rent estimates with property records and active listings. PropertyData does the same for UK postcodes, including yields, and Microburbs covers Australian rent history.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
MicroburbsAustralian property and suburb data: valuations, sales/rent history, risk overlays, schools, demographics. Finance & Commerce › Real Estate | Freemium | API key | JSON | — | Live |
PropertyDataUK postcode-level asking and sold prices, rents, yields, valuations, planning and title data. Finance & Commerce › Real Estate | Free trial | API key | JSON | — | Live |
RentCastUS property records, sale/rent value estimates, active listings and market stats for 150M+ properties. Finance & Commerce › Real Estate | Freemium | API key | JSON | <100/day | Live |
Rentometer APIUS rent estimates (mean, median, percentiles) for an address, plus nearby rental comps and area stats. Finance & Commerce › Real Estate | Paid | API key | JSON | — | Live |
MicroburbsFreemiumLive
Australian property and suburb data: valuations, sales/rent history, risk overlays, schools, demographics.
API key · JSON
—
OpenAPI spec · MCP server · llms.txt
PropertyDataFree trialLive
UK postcode-level asking and sold prices, rents, yields, valuations, planning and title data.
API key · JSON
—
no machine-readable spec
RentCastFreemiumLive
US property records, sale/rent value estimates, active listings and market stats for 150M+ properties.
API key · JSON
<100/day
llms.txt
Rentometer APIPaidLive
US rent estimates (mean, median, percentiles) for an address, plus nearby rental comps and area stats.
API key · JSON
—
OpenAPI spec
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Choosing a Rental Data API
Is there a free Rental Data API?
Yes. RentCast and Microburbs have a free tier alongside paid plans.
Which Rental Data APIs work without an API key?
All of them need a key or account. RentCast and Microburbs give one out free when you sign up.
Can I use Rental Data APIs in a commercial project?
RentCast and PropertyData permit commercial use.
Which Rental Data APIs work with AI agents?
Microburbs has both an MCP server and an OpenAPI spec. Rentometer API publishes an OpenAPI spec for generating clients and tools.
Broader: Real Estate APIs · Finance & Commerce APIs