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PropData / Use Cases
What developers build

One API. Infinite
applications.

30+ real estate data points in a single call unlocks a huge surface area of what you can build. Here's what developers are building with PropData — and exactly which data fields make each one work.

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Use Cases

What you can build
this weekend.

01
🏠

Rental Pricing Tool

Give landlords a defensible asking price with a low/mid/high range backed by 4 data sources. Show your work — Zillow market data, HUD benchmarks, Census actuals. No more guessing from Zillow comps.

/v1/estimate?zip=&beds= /v1/rent?zip=
Key fields: monthly_mid, monthly_low, monthly_high, confidence_pct, fmr_2br, methodology.data_points
02
🤖

AI Real Estate Agent

Feed structured market context directly to your LLM. PropData's clean JSON response — rent trends, DOM, vacancy, macro rates — slots perfectly into a RAG pipeline. Your AI can answer "is this a good rental market?" with real data.

/v1/market?zip=
Key fields: snapshot.signals, macro.mortgage_rate_30yr, snapshot.rent, snapshot.market, snapshot.affordability
03
📊

Investment Screener

Screen every state or ZIP for gross yield, vacancy pressure, and market velocity in one batch. Find the ZIP codes that actually pencil before your competition does. Sort by yield, filter by DOM, rank by rent growth.

/v1/market?state= /v1/market?zip=
Key fields: signals.gross_yield, affordability.vacancy_rate_pct, market.median_days_on_market, rent.rent_yoy_pct
04
⚖️

Buy vs Rent Calculator

The only real estate API that gives you live 30yr mortgage rates from FRED alongside local rent data and median home prices in one call. Build the buy vs rent calculator that every personal finance site wishes it had.

/v1/market?zip=
Key fields: macro.mortgage_rate_30yr, snapshot.rent.median_asking_rent, snapshot.market.median_listing_price, affordability.rent_to_income_ratio
05
🏗️

Landlord Software

Integrate live market data into your property management tool. Auto-suggest rent at renewal, show vacancy benchmarks against local rates, flag when a unit is underpriced relative to HUD FMR — all via API.

/v1/estimate?zip=&beds= /v1/rent?zip=
Key fields: fmr_1br through fmr_4br, monthly_mid, market_trend, census_median_gross_rent
06
📋

Section 8 / HUD Tools

HUD Fair Market Rents for every US county by bedroom count — the exact data used to set Section 8 voucher amounts. Build rent reasonableness tools, voucher calculators, and fair housing compliance dashboards without touching HUD's own APIs.

/v1/rent?zip= /v1/market?state=
Key fields: fmr_efficiency, fmr_1br, fmr_2br, fmr_3br, fmr_4br, fmr_year
07
📈

Market Report Generator

Automate weekly market updates for any ZIP, state, or metro. 12 months of rent history plus macro context — mortgage rate trends, housing starts, shelter CPI. Ship a market report feature in an afternoon, not a quarter.

/v1/market?zip= /v1/market?metro=
Key fields: history.rent_trend, history.market_trend, macro, sources
08
🏘️

Neighborhood Comparison Tool

Let users compare multiple ZIPs side by side — rent trends, vacancy, income, DOM, sale-to-list. Batch multiple ZIP queries in parallel using Cloudflare's edge infrastructure. Sub-50ms per call.

/v1/market?zip= (parallel)
Key fields: rent.median_asking_rent, affordability, market.median_days_on_market, signals
09
💰

Portfolio Valuation Engine

Estimate NOI across an entire rental portfolio. Run every ZIP through /v1/estimate to get bedroom-adjusted rent projections. Multiply by 12 for annual gross income. Apply local vacancy rates for net estimates.

/v1/estimate?zip=&beds=
Key fields: monthly_low/mid/high × 12, vacancy_rate_pct, confidence_pct
Data Mapping

The exact fields that power
each use case.

RENTAL PRICING
Fields you need
estimate.monthly_mid
estimate.confidence_pct
rent.fmr_2br (HUD benchmark)
methodology.data_points[]
INVESTMENT SCREENING
Fields you need
signals[gross_yield].value
affordability.vacancy_rate_pct
market.median_days_on_market
rent.rent_yoy_pct
BUY VS RENT
Fields you need
macro.mortgage_rate_30yr
market.median_listing_price
rent.median_asking_rent
affordability.rent_to_income_ratio
AI AGENT CONTEXT
Fields you need
snapshot.signals[] (all 8)
snapshot.rent (full object)
snapshot.affordability
macro (full object)
SECTION 8 / HUD
Fields you need
rent.fmr_efficiency (Studio)
rent.fmr_1br through fmr_4br
rent.fmr_year
sources.fmr (attribution)
MARKET REPORTS
Fields you need
history.rent_trend[] (12mo)
history.market_trend[]
macro.shelter_inflation_yoy
macro.housing_starts
Investment screener — batch 3 ZIPs, rank by gross yield
const zips = ['55104', '78701', '85001'];

// Parallel requests — sub-50ms each on CF edge
const results = await Promise.all(
  zips.map(zip =>
    fetch(`https://propdata-api-worker.sales-fd3.workers.dev/v1/market?zip=${zip}`,
      { headers: { 'x-api-key': 'YOUR_KEY' } })
    .then(r => r.json())
  )
);

// Extract gross yield signal from each
const ranked = results
  .map(d => ({
    zip: d.location.zip,
    yield: d.snapshot.signals.find(s => s.key === 'gross_yield')?.value,
    dom: d.snapshot.market.median_days_on_market,
    rent: d.snapshot.rent.median_asking_rent
  }))
  .sort((a,b) => parseFloat(b.yield) - parseFloat(a.yield));

console.log(ranked); // sorted by gross yield
Who Builds This

Built by devs who are
done stitching APIs together.

🛠️
Indie developers

Building PropTech side projects. $49/mo doesn't kill your margin. The free tier means you ship before you pay.

🏢
SaaS founders

Adding real estate data to an existing product. One API key, one line of code, no data team required.

🤖
AI builders

Powering real estate agents, chatbots, and LLM tools that need structured market context on demand.

📐
PropTech teams

Replacing a 3-API stack with one. Killing per-call billing at scale. Freeing engineers to build features instead of pipelines.

🏠
Property managers

Adding automated rent comps and market benchmarks to internal tools — without buying a subscription analytics platform.

📊
Data analysts

Pulling ZIP-level market snapshots for market research, investment analysis, or portfolio reporting via simple REST calls.

Dig Deeper

Everything you need to ship.

REFERENCE
API Documentation
Endpoints, parameters, response schema, error codes.
DEEP DIVE
Estimate Engine
How the weighted rent model works. All 4 sources explained.
OVERVIEW
Real Estate API Guide
All 30+ data points. Coverage map. Pricing comparison.
GET STARTED
Free API Key
50 req/hr free forever. No credit card required.

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