LIVE ON BASE · x402 PROTOCOL · AI-NATIVE

Property intel
for AI agents
that can't wait.

PropX402 is the real estate intelligence API built for autonomous AI agents. No API keys. No accounts. No subscriptions. Hit an endpoint, pay $0.05 USDC via x402, get a complete property report in milliseconds.

▶ Try Free Demo API Status MCP Schema
real-estate-agent.js
// AI agent queries PropX402 — pays via x402, gets full property intel const response = await fetch('https://propx402.com/property-intel', { method: 'POST', body: JSON.stringify({ address: '1234 Oak St, Cedar Rapids, IA' }) }); // → HTTP 402: Payment Required ($0.05 USDC on Base) // → Agent auto-pays via x402 wallet // → HTTP 200: Property Intelligence Report { "property": { "yearBuilt": 1987, "sqft": 1840, "beds": 3, "baths": 2 }, "valueEstimate": { "value": $218500, "low": $204000, "high": $233000 }, "rentEstimate": { "monthly": $1650, "capRate": "~9.1%" }, "floodRisk": { "zone": "X", "risk": "Minimal" }, "walkScore": 72, "schoolScore": 8.1, "neighborhood": { "medianIncome": "$61,200", "trajectory": "appreciating" }, "riskScore": 18, "riskLabel": "Low" }
// HOW IT WORKS

Three steps.
Zero friction.

PropX402 implements the x402 payment protocol. AI agents discover the endpoint, pay per query in USDC on Base, and receive structured property intelligence. No accounts, no API keys, no human in the loop.

01
Agent Requests
Your AI agent sends a POST to /property-intel with an address. No auth header needed.
02
HTTP 402 → Pay
PropX402 returns 402 Payment Required with USDC amount and Base network address. Agent auto-pays $0.05 USDC via x402 wallet.
03
Get Intel
Payment verified on Base. Structured JSON returned instantly: property data, AVM, flood risk, walkability, neighborhood demographics, risk score.
04
Upgrade: Narrative
Pay $0.10 USDC for /property-narrative — Claude Sonnet 4.6 writes a full investment analysis, risk assessment, and agent recommendation.
// PRICING

Pay per query.
Never subscribe.

All payments settled instantly in USDC on Base. No billing cycles. No minimums. No chargebacks. Agents pay exactly for what they use.

POST /property-intel
$0.05
USDC per query · Base network
Full property intelligence report. AVM, owner data, flood risk, walkability, school scores, census demographics, environmental data, risk score.
POST /property-narrative
$0.10
USDC per query · Base network
Claude Sonnet 4.6 investment analysis. Full property narrative, market position, cap rate outlook, risk assessment, agent recommendation.
POST /property-bulk
$0.03
USDC per address · up to 20
Bulk property intelligence for portfolio analysis. Up to 20 addresses per call. Same data, parallel processing, lower per-unit cost.
// DATA SOURCES

Best-in-class data.
Aggregated for agents.

PropX402 aggregates from 6+ authoritative sources in parallel and returns a single normalized JSON payload in under 3 seconds.

RentCast
140M+ property records. AVM, rent estimates, owner info, comparables, last sale data.
API Key Required
FEMA Flood Maps
Official flood zone designation. Risk level, FIRM panel ID, in-flood-zone flag.
100% Free
US Census ACS
Neighborhood demographics. Income, home values, rent, unemployment, education, median age.
100% Free
Walk Score
Walk, transit, and bike scores. Livability assessment for any US address.
Free Tier
EPA EJSCREEN
Environmental risk scoring. Air quality, superfund proximity, hazardous waste.
100% Free
OpenStreetMap
Geocoding and address normalization. Zero cost, global coverage.
100% Free
// LIVE DEMO

Try the free
health endpoint.

Test the API discovery endpoint for free. Production property intel queries require $0.05 USDC via x402.

GET /health — Free API discovery (no payment required)
GET /.well-known/mcp — MCP Tool Schema (for LLM agent discovery)