Most real estate APIs cost a fortune, demand enterprise contracts, gate the useful endpoints, and then charge per-call on top. PropData was built to kill that model. 14 aggregated sources — including three built in-house — served from 165+ Cloudflare Workers globally at sub-50ms. Flat $49/mo. No per-call fees. Ever.
What nobody else at this price point has: 80M+ county assessor parcels (owner names, assessed values, last sale history) ingested directly from public ArcGIS layers — the same source ATTOM and CoreLogic license, except PropData built the pipeline themselves. Plus FEMA natural hazard risk across 18 hazards, and a Community Safety Score that combines schools, crime, poverty, social vulnerability, and resilience into a single A–F grade. That stack doesn't exist anywhere else at $49/mo.
// Live API Response — ZIP 55101
One endpoint. 14 live sources. Rent, market velocity, affordability signals, macro context — all merged, all computed, all in one JSON response. ATTOM charges $2,000/mo for less. You pay $49.
01 / Rent Estimator Widget
PropData's proprietary estimate engine combines Zillow ZORI (40%), Census ACS (25%), HUD FMR (20%), and Redfin cap rate (15%) into a low/mid/high range with a confidence score. Every other API gives you a number with no explanation. PropData shows you the exact model weights. Embeddable on any landlord or real estate site in an afternoon.
GET /v1/estimate?zip=55101&beds=2
→ { monthly_low: 1288, monthly_mid: 1400, monthly_high: 1512, confidence_pct: 100 }
02 / HUD Compliance Checker
Pull HUD FMR for any ZIP by bedroom count and compare to market asking rent. Flag whether a unit is above, at, or below voucher payment standards. Property managers and affordable housing devs will pay for this as a standalone tool — the data is already inside every /v1/rent call.
GET /v1/rent?zip=30301
→ { fmr_2br: 1640, fmr_year: 2025, median_asking_rent: 1820 } // $180 above FMR
03 / Market Timing Score
The signals are already computed in every /v1/market response — sale/list ratio, DOM, inventory YoY, gross yield sentiment. Combine them into a single 0–100 score and visualize as a gauge. You're getting the market intelligence CoStar sells for $500/mo for $49.
GET /v1/market?zip=90210
→ signals: gross_yield 6.0% · DOM 27d · inventory_yoy -10.3% · rent_growth +4.1%
04 / FEMA Natural Hazard Risk Map EXCLUSIVE
Nobody else at any price point has FEMA National Risk Index v1.20 baked into a real estate API. 18 hazard risk scores — wildfire, flood, hurricane, tornado, earthquake, hail, heat wave, drought, and 9 more — per-capita annualized loss rate percentiles at county level. Visualize on a US heat map. This is the data FEMA uses to allocate disaster preparedness funds. Build the wildfire/flood risk layer that institutional investors actually want before buying.
GET /v1/market?zip=90265 // Malibu, CA
→ fema_risk: { wildfire: "Very High", flood: "Moderate", percentile: 94 }
05 / Community Safety Grade Tool EXCLUSIVE
PropData's Community Safety Score combines NCES school quality (100K+ schools), Census ACS poverty and unemployment, FBI CDE crime data, and FEMA Social Vulnerability Index into a single A–F grade with an AI narrative explanation. Institutional investors pay $10K/yr for this kind of composite due-diligence data. You get it at $49/mo. Build a neighborhood report card, a school district finder, or a crime-aware property screener in an afternoon.
GET /v1/market?zip=55401
→ safety_grade: "B+" · schools: 82/100 · poverty_rate: 12.4% · crime_index: "Low"
06 / Real Estate Investor Dashboard
Pull /v1/market for live gross yield, vacancy, and rent growth signals across every property in a portfolio. Pull /v1/estimate for current rent benchmarks. Pull /v1/property for assessed value and last sale to compute current equity. Auto-flag properties where rent growth has outpaced original underwriting. This is the dashboard every SFR investor wants and nobody has built cheaply yet.
GET /v1/market?zip=78701 // gross_yield · vacancy · rent_growth · DOM
GET /v1/estimate?zip=78701&beds=2 // current rent range
GET /v1/property?address="456+Oak+Ave+Austin+TX" // assessor + last sale
07 / Owner Lookup / Skip Trace Tool
PropData built the pipeline directly from public ArcGIS county assessor layers — the same source ATTOM licenses and charges $2,000/mo for. The /v1/property endpoint returns owner name, mailing address, assessed value, last sale price, year built, and bedroom count for 80M+ parcels across 20+ states. Wrap it in a form, charge per lookup or flat monthly. The data is there — you just need the interface.
GET /v1/property?address="789+Pine+Rd+Seattle+WA+98117"
→ { owner: "Jane Smith", assessed_value: 847000, last_sale: 2021-06-15 }
08 / Comparable Sales Engine
The /v1/comps endpoint is built on PropData's 80M+ parcel database — ranked comps scored on price, sqft, recency, and bedroom count with low/mid/high range and avg price/sqft. What ATTOM charges $2,000/mo for. Geocode the address first with /v1/geocode, then pull comps. The foundation of any AVM, CMV, or property valuation product.
GET /v1/geocode?address="337+NW+86th+St+Seattle+WA" // → lat · lng · zip · county
GET /v1/comps?address="337+NW+86th+St+Seattle+WA" // → ranked comps · price/sqft
09 / Mortgage Rate Alert System
Every /v1/market response includes live FRED macro data — the 30yr fixed rate, shelter CPI, housing starts. Set a cron to poll it, compare to user-defined thresholds, and fire via SendGrid/Twilio/Slack webhook. At 6.82% today with a falling trend flag, rate alert tools have never been more relevant to homebuyers and investors watching for entry windows.
GET /v1/market?state=MN
→ macro.mortgage_rate_30yr: 6.82 · mortgage_trend: "falling" · shelter_inflation_yoy: 4.2
10 / AI Deal Memo Generator
Pull every PropData endpoint for a given address — /v1/market (rent, signals, macro), /v1/property (assessor, owner, last sale), /v1/comps (ranked comps), /v1/estimate (rent range), FEMA risk, Community Safety grade — then feed the structured JSON into Claude API with a deal memo prompt. Output a formatted 2-page investor brief. PropData already does this internally. You can build the same thing. Charge $15–$25/report. The entire stack is Cloudflare Workers + PropData + Claude. One Saturday.
// Aggregate all PropData endpoints, then:
const memo = await claude.messages.create({
model: "claude-sonnet-4-20250514",
messages: [{ role: "user", content: propDataContext }]
})
$ / Pricing — Simple. No Surprises.
- 50 requests/hour
- All endpoints
- ZIP, state, metro
- Investor signals
- 500 requests/hour
- 36 months of history
- All endpoints
- Email support
- County assessor data
- Owner name + address
- Skip trace lookup
- Bulk ZIP export
14 sources — including FEMA risk, Community Safety grades, and 80M+ county assessor parcels that nobody else at $49/mo has. Proprietary estimate engine with explicit model weights. No per-call fees ever. Free tier with no credit card. The real estate data problem is solved. Your job is deciding what to build on top of it.