What is a real estate API?

A real estate API lets developers access property market data programmatically. This includes rent estimates, days on market, vacancy rates, home prices, and more. PropData aggregates 9 sources including Zillow, Redfin, HUD, Census, and FRED into a single API endpoint.

What data does PropData's real estate API include?

PropData returns rent data (ZORI + HUD FMR bedroom rents), market data (DOM, inventory, sale-to-list), affordability (vacancy rate, median income), home price appreciation (FHFA HPI), FRED macro data (30yr mortgage rate, shelter CPI, housing starts), and 8 AI-computed investor signals — all in one API call.

How much does a real estate API cost?

PropData charges $49/month flat with no per-call fees. A free tier is available with 50 requests/hour, no credit card required. Most other real estate APIs charge per call — at 10,000 calls/month that adds up to $100-500 with competitors.

What ZIP codes does the real estate API cover?

PropData covers 33,000+ ZIP codes across all 50 US states, plus state-level and metro-level queries. Dense metro ZIPs return all 9 data sources. Coverage varies by ZIP based on underlying source availability.

Live API · Free Tier Available

The real estate API
developers actually want.

Rent estimates, market velocity, vacancy rates, bedroom-level HUD rents, live mortgage rates, and investor signals — merged from 9 sources into one clean JSON response. Ship your feature in an afternoon.

Get free API key → View docs

30+Data Points/ZIP

9Data Sources

33K+ZIP Codes

$49Flat/Month

What's Included

Every data point a real estate
developer needs. One call.

PropData aggregates 9 government and commercial datasets, normalizes them, and serves them from Cloudflare edge cache in under 50ms. No stitching. No rate limit juggling. No per-call billing surprises.

🏠

Rent Data

ZILLOW ZORI + HUD FMR

Median asking rent YoY trend MoM change Studio–4BR rents Census median

📊

Market Velocity

REALTOR.COM + REDFIN

Days on market Active listings Sale-to-list ratio % above list Homes sold Price/sqft

📈

Affordability

US CENSUS ACS

Vacancy rate Renter % Median income Rent burden Total units

🏦

Macro Data

FRED — EXCLUSIVE

30yr mortgage rate Shelter CPI Housing starts National vacancy

⚡

Investor Signals

PROPDATA — COMPUTED

Gross yield Rent growth Market velocity Vacancy signal HPI trend

🏗️

Home Prices

FHFA HPI

HPI index 1yr appreciation Quarter State + metro

Quick Start

One call. Everything you need.

Pass a ZIP code, state, or metro name. Get back a fully structured JSON response — normalized, computed, and ready to use.

GET /v1/market?zip=90210

      // One line to get 30+ data points

      const res = await fetch(

        'https://propdata-api-worker.sales-fd3.workers.dev/v1/market?zip=90210',

        { headers: { 'x-api-key': 'YOUR_KEY' } }

      );

      const data = await res.json();

      // Access any data point directly

      data.snapshot.rent.median_asking_rent;   // $2,847

      data.snapshot.rent.fmr_2br;             // $2,340 (HUD)

      data.snapshot.market.median_days_on_market;// 28 days

      data.snapshot.market.sale_to_list_ratio;  // 1.02 (above list)

      data.snapshot.affordability.vacancy_rate_pct;// 4.1%

      data.macro.mortgage_rate_30yr;         // 6.38%

      data.snapshot.signals;                 // 8 investor signals

Use Cases

What developers build
with a real estate API.

Rental Pricing Tools

Pull bedroom-level rent ranges for any ZIP. HUD FMR + ZORI + proprietary estimate engine gives you low/mid/high with confidence scores.

ESTIMATE ENGINE · HUD FMR · ZORI

Investment Screeners

Screen all 50 states for gross yield, vacancy, and DOM in one batch. Find undervalued markets before your competition does.

SIGNALS · REDFIN · CENSUS

AI Real Estate Agents

Give your LLM structured market context — rent trends, DOM, affordability, macro rates — in a single API call that fits your context window.

ALL 9 SOURCES · JSON READY

Buy vs Rent Calculators

Combine live 30yr mortgage rates from FRED with local rent data and median home prices. The only real estate API that gives you both in one call.

FRED · REALTOR.COM · ZORI

Market Report Apps

One call returns 12 months of rent history, market trend data, and macro context. Automate weekly market updates for any ZIP or state.

HISTORY · ZORI · REALTOR.COM

Section 8 & Voucher Tools

HUD Fair Market Rents by bedroom count for every US county — the exact data used to set Section 8 voucher amounts. Build compliance tools instantly.

HUD FMR · EVERY COUNTY

Pricing Comparison

Real estate API pricing
at scale.

Most real estate APIs charge per call. At any real usage volume, that adds up fast. PropData is flat $49/mo — no surprises, no per-call math.

Monthly calls	PropData	RentCast (est.)	ATTOM
1,000	$49	$15–50	$500+
5,000	$49	$75–250	$500+
10,000	$49	$150–500	$500+
50,000	$49	$750–2,500	Custom
Free tier	✓ No credit card	—	—

The real estate APIdevelopers actually want.

Every data point a real estatedeveloper needs. One call.