Real estate
intelligence
+ API.
The first property database built to learn from the searches it can't yet answer. 166M+ parcels sourced directly from government records — no CoreLogic, no ATTOM, no licensing layer. When PropData misses, it doesn't stop. It sources, scores, and caches. The repeat lookup returns in under a second. From $79/mo flat. No per-call fees. Ship in an afternoon.
Sixteen sources.
Five built in-house.
One response.
PropData aggregates 16 live sources — including our own direct-ingest pipeline of 166M+ county assessor parcels across 50 states. Owner names, mailing addresses, assessed values, last sale prices, year built, bedrooms. The same public source ATTOM and CoreLogic license — except we built the pipes ourselves. Plus Zillow ZORI, Realtor.com, Redfin, HUD FMR, Census ACS, FHFA HPI, FRED, and a proprietary Estimate Engine. All at $49/mo flat.
Fair Market Rents
The government's official rent benchmark — the same data used to set Section 8 voucher amounts. Every county in America. Studio through 4-bedroom. Ground truth for affordability analysis.
Observed Rent Index
ZORI — Zillow's smoothed median asking rent for all homes and multifamily. The most cited rent trend dataset in real estate. ZIP, metro, state, and national with 10 years of history.
Market Metrics
Monthly listing data: median prices, days on market, active inventory, new listings, price reductions, price per sqft. The pulse of the for-sale market at ZIP level.
Market Tracker
Sale-to-list ratio, % sold above list, days to pending, months of supply. The sharpest demand signal in public real estate data.
ACS Demographics
Vacancy rates, renter %, median income, rent-to-income ratio, poverty rate, unemployment. Affordability context nobody else includes at this price point.
FRED Macro Data
Mortgage rates, shelter inflation, national vacancy rate, and housing starts. National economic context alongside local market data.
House Price Index
Quarterly home price appreciation by state and metro. The definitive government measure of home value change — used by mortgage lenders, Fed economists, and institutional investors.
Building Permits
Monthly new construction by unit type. The forward-looking supply signal — permits today become inventory in 12-18 months. Predicts rent pressure before it shows up in listing data.
PropData Estimate Engine
Weighted rent estimate model built on owned data. ZORI (40%) + Census ACS (25%) + HUD FMR (20%) + Redfin cap rate (15%). Returns low/mid/high range with confidence score. No third-party dependency.
County Assessor Records
We built the pipeline. 166M+ parcel records ingested directly from public ArcGIS layers — the same source ATTOM and CoreLogic buy from. Owner names, mailing addresses, assessed values, last sale price, year built, bedrooms. We don't license this. We built it.
Comps Engine
Comparable sales engine built on our 166M+ parcel database. Ranked comps scored on price, sqft, recency, and bedroom count. Low/mid/high range + avg price per sqft. What ATTOM charges $2,000/mo for.
Geocoder
Address resolution built on our county assessor parcel database. Converts any US address to lat/lng, ZIP, county, state, and FIPS codes. No third-party dependency — our data, our infrastructure.
Natural Hazard Risk Index
18 natural hazard risk scores by county — wildfire, flood, hurricane, tornado, earthquake, hail, heat wave, drought, winter weather, and 9 more. Per-capita annualized loss rate percentiles so you're not comparing Maricopa County to rural Kansas unfairly. The same dataset FEMA uses to allocate disaster preparedness funds. Visualized on a live US heat map. Now inside your API call.
Community Safety Score
Composite A–F grade combining school quality (100K+ schools), poverty, unemployment, social vulnerability, resilience, and crime. The due-diligence data institutional investors pay $10K/yr for.
Opportunity Zones + USDA Rural
Every ZIP in America flagged for federal Opportunity Zone designation and USDA rural loan eligibility. OZ investors defer capital gains taxes. USDA eligibility means zero-down financing. Two filters that change deal structure entirely.
FEMA Flood Hazard + Skip Trace
FEMA National Flood Hazard Layer flood zone per property — Zone A, AE, X — mandatory insurance baked in. Skip trace returns owner phones, email, and equity data. Microsoft ML building footprints add sqft and height per structure.
The same data powers these platforms
Built on Cloudflare.
Own data pipeline.
Zero cold starts.
PropData runs on 10+ dedicated Cloudflare Workers with a shared KV cache and Supabase backend. Every ingestion worker runs on its own cron — HUD weekly, ZORI and Realtor monthly. Data is cached at the edge and served in under 50ms anywhere in the world. This is the same infrastructure stack powering PropTechUSA.ai's 200+ production Workers.
PropTechUSA.ai Infrastructure
PropData runs on 10+ dedicated Workers inside PropTechUSA.ai's 200+ Worker production stack — the same infrastructure powering IntelligentHomeBuying, IntelligentLandlord, and LHBUSA. No monolith. Pure edge.
KV Edge Cache
All market data cached at Cloudflare's edge. 7-day TTL. Sub-50ms reads globally.
Supabase Canonical Store
15+ normalized tables. ZORI, Realtor, Redfin, HUD FMR, Census ACS, FHFA HPI — ZIP, state, and metro tiers. Indexed for fast queries.
API Key Auth + Rate Limiting
Tiered access. Free 50/hr, Pro 500/hr, Internal unlimited. Keys provisioned in KV instantly.
Merged data.
Computed signals.
Every /v1/market response includes rent data, market velocity, affordability, FRED macro, and computed investor signals — all merged from 16 live sources. Add /v1/property to get owner names, assessed values, and last sale history direct from county assessor records. ATTOM charges $2,000/mo for a fraction of this. You pay $49.
Rent + listing + signals — one response
Fastest endpoint for rent-focused apps
For-sale market pulse at ZIP level
Proprietary weighted model · low/mid/high range + confidence score
Owner name · mailing address · assessed value · last sale · 166M+ parcels
lat · lng · ZIP · county · state · FIPS — feed into /v1/property or /v1/market
Density · walkability · surrounding market signals
Total parcels indexed · breakdown by state
Build anything.
Ship fast.
One endpoint. 16 live data sources. 166M+ parcels indexed. Proprietary estimate engine. Zero per-call fees. Everything you need to build institutional-grade real estate tooling.
https://propdata-api-worker
.sales-fd3.workers.dev
application/json
AUTHENTICATION
Every request requires your API key. Pass it as a header (recommended) or query parameter.
ENDPOINTS
CODE EXAMPLES
'https://propdata-api-worker
.sales-fd3.workers.dev/v1/market
?state=MN',
{ headers: {
'x-api-key': 'YOUR_KEY'
} }
);
const data = await res.json();
// data.snapshot.market.hpi_1yr_chg
// data.snapshot.signals[0].value
RATE LIMITS
ERROR CODES
401
Invalid or missing API key
404
No data for this location
429
Rate limit exceeded — upgrade to Pro
500
Server error — contact support
Get your API key in 10 seconds.
Free tier. No credit card. No BS.
Independent AI analysis.
We didn't write this.
We gave Gemini a free trial account and asked no leading questions. This is what it said unprompted after exploring the dashboard.
| FEATURE | PROPDATA | RENTCAST | CORELOGIC |
|---|---|---|---|
| Best For | Strategy & AI Insights | Quick Rent Comps | Institutional / Lending |
| Data Sources | 14+ (Multi-source) | Proprietary / Aggregated | Primary Source |
| Analysis Style | AI-Narrative (Claude) | Raw Data & Charts | Heavy Technical Reports |
| Ease of Use | High (Modern UI) | High (Simple) | Low (Enterprise Focus) |
| Risk Layers | FEMA, Social, Econ | Minimal | Extensive |
"CoreLogic just hands you a 50-page PDF and expects you to figure it out. PropData uses Claude AI to actually explain the data to you."
"If that data becomes available on a modern, low-cost API, their leverage evaporates. The gatekeeper model dies."
The only API that gives you
data AND intelligence.
→ Read the full RentCast comparison + cost calculator
RentCast is a rent lookup. ATTOM and CoreLogic are enterprise contracts with sales calls and procurement. PropData is the only API at any price point that bundles live mortgage rates, vacancy data, investor signals, and a proprietary rent estimate engine — with a free tier, no credit card, no per-call fees. Ever.
| Feature | PropData | RentCast | ATTOM | CoreLogic |
|---|---|---|---|---|
| Pricing | From $79/mo | Per call | $500+/mo | $1,000+/mo |
| At 10,000 calls/month | $79 flat | $100–500 | $500+ | $1,000+ |
| Free tier — no credit card | ✓ | — | — | — |
| No per-call fees ever | ✓ | — | — | — |
| MARKET DATA | ||||
| Rent by bedroom (HUD FMR) | ✓ | ✓ | — | — |
| Median asking rent trend (ZORI) | ✓ | ✓ | ✓ | ✓ |
| Days on market + inventory (Realtor.com) | ✓ | — | ✓ | ✓ |
| Sale-to-list ratio (Redfin) | ✓ | — | ✓ | ✓ |
| Affordability data (Census ACS) | ✓ | — | ✓ | ✓ |
| Home price appreciation (FHFA HPI) | ✓ | — | ✓ | ✓ |
| FRED macro data (mortgage rates, shelter CPI) | ✓ Exclusive | — | — | — |
| AI investor signals (computed) | ✓ Exclusive | — | — | — |
| Proprietary rent estimate engine | ✓ | ✓ | ✓ | ✓ |
| ZIP + State + Metro coverage | ✓ | ✓ | ✓ | ✓ |
| OWN PIPELINE | ||||
| County Assessor Records | 166M+ Own Pipeline | — | Licensed | Licensed |
| Geocoder (address → lat/lng) | ✓ /v1/geocode | — | — | — |
| Comparable sales engine | ✓ /v1/comps | — | $2K+/mo | $2K+/mo |
| 🔒 NOBODY ELSE HAS THIS | ||||
| FEMA Natural Hazard Risk (18 hazards) | ✓ Exclusive | — | — | — |
| Wildfire risk score (county-level) | ✓ Exclusive | — | — | — |
| Flood risk score (county-level) | ✓ Exclusive | — | — | — |
| Hurricane + tornado risk scores | ✓ Exclusive | — | — | — |
| Community Safety Score (A–F) | ✓ Exclusive | — | — | — |
| School district quality (NCES) | ✓ Exclusive | — | — | — |
| Poverty + unemployment rate (ZIP-level) | ✓ Exclusive | — | — | — |
| Crime data (FBI CDE) | ✓ Launching soon | — | Add-on | Add-on |
| Live US heat map (14 layers) | ✓ Exclusive | — | — | — |
| AI Market Analysis + Deal Memo | ✓ Exclusive | — | — | — |
| 12-month Market Forecast Engine | ✓ Exclusive | — | — | — |
Simple pricing.
No surprises.
Flat monthly access. Your API key is live the moment you sign up. Trial auto-converts · Cancel anytime for the free tier. Cancel pro anytime. Enterprise gets direct founder access.
- 10,000 requests/month
- All 20 endpoints
- Full market intelligence
- Neighborhood + FEMA data
- 166M+ parcel lookups
- Comps engine
- Geocoding
- enrich=full — Builder+
- Historical data — Builder+
- 50,000 requests/month
- Everything in Starter
- ?enrich=full unlocked
- Flood · tax · equity · comps · score
- Historical data (past years)
- Priority email support (24hr)
- 3 API keys
- Slack support — Scale+
- 250,000 requests/month
- Everything in Builder
- Full batch operations
- Email + Slack support (4hr)
- 10 API keys
- 99.0% uptime SLA
- Cancel anytime
- Unlimited requests
- Everything in Scale
- Direct Supabase access
- White-label rights
- 99.9% uptime SLA
- Direct founder access
- Unlimited API keys
What developers build
with PropData.
One API key. Twenty endpoints. The complete data layer for the next generation of real estate tools.
RentCast licenses public data.
ATTOM resells it at $2,000/mo.
We built the pipeline. From $79/mo.
The only API with rent data, market velocity, and county assessor records — owner names, assessed values, skip trace — starting at $79/mo flat. Built by Justin Erickson / PropTechUSA.ai. The data ATTOM charges $2,000/mo for. 3-day free trial. Cancel before day 3 — pay nothing. 290+ Cloudflare Workers in production.
x-api-key
?api_key=
propdata-api-worker.sales-fd3.workers.dev
\\\\`${API_BASE}/v1/market
?zip=55101\\\\`,
{ headers: {
'x-api-key': 'YOUR_KEY'
} }
);
const data = await res.json();
A data API that tells developers what changed.
PropData now exposes a live /v1/changelog endpoint so teams can programmatically track infrastructure, endpoint, and data-enrichment updates.
Recent updates include Alabama property/comps stabilization, Jefferson County enrichment, ZIP-to-county FIPS crosswalk support, and expanded post-deploy regression coverage.
GET https://propdata-api-worker.sales-fd3.workers.dev/v1/changelog