What is a real estate API?

A real estate API lets developers access property market data programmatically. PropData aggregates 16 sources including Zillow, Redfin, HUD, Census, FEMA, FRED, and our own 166M+ parcel pipeline into a single API endpoint — all at $79/mo flat with no per-call fees.

What data does PropData's real estate API include?

PropData returns rent data (ZORI + HUD FMR), market data (DOM, inventory, sale-to-list), affordability (Census ACS), home price appreciation (FHFA HPI), FRED macro data (30yr mortgage rate, shelter CPI), FEMA Natural Hazard Risk (18 hazards), Community Safety Score (A-F), 166M+ county assessor owner records, AI investor signals, comps, geocoding, and skip trace — all in one API call.

How much does PropData's real estate API cost?

PropData starts at $79/month flat with no per-call fees. A 3-day free trial is available on all paid plans. 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. The 166M+ parcel database covers all 50 states with direct ArcGIS ingest from public county records.

Live API · 16 Sources · 3-Day Free Trial

The real estate API
developers actually want.

Rent estimates, market velocity, FEMA hazard risk, AI investor signals, 166M+ county assessor owner records, and live mortgage rates — merged from 16 sources into one clean JSON response. Ship your feature in an afternoon.

Start 3-Day Free Trial → View Docs

166M+

Parcel Records

Own pipeline — no licensing

Live Data Sources

One API call

33K+

ZIP Codes

All 50 states

$79

Flat / Month

No per-call fees ever

What's Included

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

PropData aggregates 16 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 12-month history

📊

Market Velocity

REALTOR.COM + REDFIN

Days on market Active listings Sale-to-list ratio % above list Price/sqft Inventory YoY

📈

Affordability

US CENSUS ACS

Vacancy rate Renter % Median income Rent burden Poverty rate

EXCLUSIVE

🏦

Live Macro Data

FRED — FEDERAL RESERVE

30yr mortgage rate Shelter CPI Housing starts National vacancy

EXCLUSIVE

⚡

AI Investor Signals

PROPDATA — COMPUTED

Gross yield Rent growth signal Market velocity Vacancy signal Inventory pressure

🏗️

Home Price Index

FHFA

HPI index 1yr appreciation State + metro Quarterly

166M+ PARCELS

🏘️

County Assessor Records

PROPDATA OWN PIPELINE

Owner name Mailing address Assessed value Last sale price Year built Bedrooms

EXCLUSIVE

🌪️

FEMA Natural Hazard Risk

FEMA NATIONAL RISK INDEX

Wildfire Flood Hurricane Tornado Earthquake 18 hazards total

EXCLUSIVE

🏫

Community Safety Score

NCES + FBI CDE + CENSUS

A–F grade School quality Crime rate Social vulnerability Resilience index

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. No stitching required.

GET /v1/market?zip=55101 — 16 sources · under 50ms

// One line to get 50+ data points from 16 sources

const res = await fetch(

  'https://propdata-api-worker.sales-fd3.workers.dev/v1/market?zip=55101',

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

);

const data = await res.json();

// Rent data

data.snapshot.rent.median_asking_rent;    // $1,540

data.snapshot.rent.fmr_2br;              // $1,540 (HUD)

// Market velocity

data.snapshot.market.median_days_on_market; // 24 days

data.snapshot.market.sale_to_list_ratio;   // 1.01 (above list)

// Macro — FRED exclusive

data.macro.mortgage_rate_30yr;          // 6.82%

// AI investor signals

data.snapshot.signals[0]; // { key: "gross_yield", value: "6.0%", sentiment: "neutral" }

// Owner record (166M+ parcels)

const prop = await fetch('/v1/property?address=337+NW+86th+St+Seattle+WA'...);

prop.owner_name;      // Direct from county assessor

prop.market_value;    // $387,500

prop.annual_tax;      // $4,812

Proprietary Technology

The Miss Flywheel.
No other real estate API has this.

Every other property data provider has a miss problem. Query comes in, they don't have it, they return null. Dead end forever. We built something different.

Miss detected

Property not in production database. Pipeline fires instead of returning null. The query becomes a real-time sourcing trigger.

Source-backed lookup

Live query against permitted government data — ArcGIS assessor and verified public records only. No fabricated fields. No AI-generated values.

Field-level confidence scoring

Parcel ID, market value, tax, year built, lot size — deterministic derivations only. Owner, beds, baths, and sale price stay blank until source-verified from a government record. No exceptions.

Cached to edge — repeat lookup under 1 second

Written to Supabase and Cloudflare KV edge cache. The repeat lookup on that property returns in under a second from the nearest edge node globally.

Coverage compounds forever

Every query closes a gap. The database gets denser on every search. The system improves from use. No other real estate API in any price category does this.

166M+

Parcels Indexed

Direct ingest from public ArcGIS layers — 50 states. The same source ATTOM and CoreLogic license. We built the pipeline ourselves. No middleman.

<1s

Repeat Lookup Speed

Once sourced and cached to Cloudflare KV, every repeat lookup returns from the nearest edge node in under a second — anywhere in the world.

Licensing Fees

No CoreLogic. No ATTOM. No BatchData. Government-sourced public records only — our pipeline, our infrastructure, our cost structure passed to you.

Use Cases

What developers build
with PropData.

One API key. Twenty endpoints. The complete data layer for the next generation of real estate tools.

🏠

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. AI signals tell you whether a market is a buy — not just raw numbers.

AI SIGNALS · REDFIN · CENSUS · FHFA

🤖

AI Real Estate Agents

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

ALL 16 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 · FHFA

🔍

Property Owner Skip Trace

166M+ parcel database returns owner names, mailing addresses, assessed values, and equity data. Feed your CRM or acquisitions pipeline directly.

166M+ PARCELS · OWN PIPELINE

🌪️

Risk-Aware Investment Tools

FEMA Natural Hazard Risk across 18 categories per county — wildfire, flood, hurricane, earthquake. The due-diligence data institutional investors pay for.

FEMA · COMMUNITY SAFETY SCORE

Pricing

Flat rate.
No surprises.

No per-call fees. No usage tiers that sneak up on you. 3-day free trial on every paid plan. Cancel before day 3 — pay nothing.

STARTER

^$79_/mo

✓ 3-day free trial

All 20 endpoints. 10,000 requests/month. Ship in an afternoon.

All 20 endpoints
10,000 requests/month
Full market intelligence
166M+ parcel lookups
FEMA risk + safety score
Comps engine + geocoding
enrich=full (Builder+)

Start Free Trial →

Trial auto-converts · Cancel anytime

⚡ MOST POPULAR

BUILDER

^$199_/mo

✓ 3-day free trial

50,000 requests/month. Full enrichment. Priority support.

Everything in Starter
50,000 requests/month
?enrich=full unlocked
Flood · tax · equity · comps
Historical data (past years)
Priority email support (24hr)
3 API keys

Start Free Trial →

Trial auto-converts · Cancel anytime

SCALE

^$499_/mo

✓ 3-day free trial

250,000 requests/month. Full batch. 99% uptime SLA.

Everything in Builder
250,000 requests/month
Full batch operations
Email + Slack support (4hr)
10 API keys
99.0% uptime SLA

Start Free Trial →

Trial auto-converts · Cancel anytime

ENTERPRISE

^$1,499_/mo

✓ 3-day free trial

Unlimited. Direct Supabase. White-label rights.

Everything in Scale
Unlimited requests
Direct Supabase access
White-label rights
99.9% uptime SLA
Direct founder access
Unlimited API keys

Start Free Trial →

Trial auto-converts · Cancel anytime

Monthly calls	PropData	RentCast (est.)	ATTOM	CoreLogic
1,000	$79	$15–50	$500+	$1,000+
5,000	$79	$75–250	$500+	$1,000+
10,000	$79	$150–500	$500+	$1,000+
50,000	$199	$750–2,500	Custom	Custom
3-day free trial	✓ Cancel before day 3	—	—	—
No per-call fees	✓ Ever	—	—	—

Start building in minutes.
Cancel before day 3.

16 live sources. 166M+ parcels. FEMA risk. AI signals. 3-day free trial on every plan. Cancel before day 3 and pay nothing.

Start Free Trial → Read the Docs

Also on RapidAPI · propdata@proptechusa.ai · 1-888-784-3881

The real estate APIdevelopers actually want.

Every data point a real estatedeveloper needs. One call.

One call. Everything you need.

The Miss Flywheel.No other real estate API has this.

What developers buildwith PropData.

Rental Pricing Tools

Investment Screeners

AI Real Estate Agents

Buy vs Rent Calculators

Property Owner Skip Trace

Risk-Aware Investment Tools

Flat rate.No surprises.

See how PropDatastacks up.

Start building in minutes.Cancel before day 3.

The real estate API
developers actually want.

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

The Miss Flywheel.
No other real estate API has this.

What developers build
with PropData.

Flat rate.
No surprises.

See how PropData
stacks up.

Start building in minutes.
Cancel before day 3.