RentYield Atlas — Free Rental Data API

JSON rental-market analytics for 8,427 US ZIP codes. No key, no signup, 100 requests/day per IP. June 2026 data.

GET /api/v1/market/{zip}

curl https://smeltworks.com/rentyield/api/v1/market/30310

{
  "zip": "30310", "city": "Atlanta", "state": "GA",
  "metro": "Atlanta-Sandy Springs-Roswell", "county": "Fulton County",
  "home_value_usd": 248000, "market_rent_usd": 1720,
  "gross_rental_yield_pct": 8.32, "price_to_rent_ratio": 12.0,
  "home_value_change_1y_pct": 1.4, "home_value_change_5y_pct": 44.2,
  "rent_change_1y_pct": 3.1, "rent_change_5y_pct": 31.7,
  "data_month": "June 2026"
}

Illustrative shape — call it for live values.

GET /api/v1/rankings

Screen the whole country or one state.

curl "https://smeltworks.com/rentyield/api/v1/rankings?state=TX&metric=yield&limit=10"

Param	Values	Default
`state`	2-letter code, or omit for nationwide	—
`metric`	`yield`, `cheap`, `growth`, `rentgrowth`	yield
`limit`	1–200	25

Notes

ZIPs with a home value under $50,000 are excluded from rankings.
Errors are standard HTTP: 404 unknown ZIP, 429 over the daily free limit.
Attribution appreciated: "Rental data via RentYield Atlas / Zillow Research."

Full dataset — all 8,427 ZIP codes · $19 one-time

Need it in bulk instead of one call at a time? CSV, opens in Excel / Sheets / pandas. 13 columns incl. metro, county, price-to-rent, 1y & 5y value and rent growth.

Get the CSV — $19

Instant download after checkout · what's inside

Higher API limits or a monthly refresh feed? Email [email protected].