# FloodPulse — natural-hazard risk for US addresses

One call: FEMA flood zone and 30-year flood odds, terrain from the Registry of Open Data on AWS, NOAA county heat history, and FEMA National Risk Index ratings for wildfire, heat and storms. $5-$15 per query via x402, charged only for successful answers.

## Quick start
```
GET https://floodpulse.waltsoft.net/v1/flood?address=1700%20Convention%20Center%20Dr%2C%20Miami%20Beach%2C%20FL%2033139
Header: PAYMENT-SIGNATURE: <base64 x402 payment>
```

## Sources
- US Census Geocoder (TIGER/Line): address -> coordinates and census tract
- FEMA National Flood Hazard Layer: flood zone, Special Flood Hazard Area, base flood elevation
- FEMA National Risk Index (census tract; the release used is reported in every response): hazard ratings, national percentiles, annualized frequency, expected annual loss
- Copernicus GLO-30 DEM (Registry of Open Data on AWS): surface elevation
- Global 30m Height Above Nearest Drainage (Registry of Open Data on AWS): height above nearest drainage
- NOAA nClimGrid-Daily county averages (Registry of Open Data on AWS): daily maximum temperature 1981-2024

## Limits
- Observed history and current FEMA ratings only: no forward projections.
- 30-year flood odds are bounds derived from the FEMA zone's annual chance; null where FEMA gives no bound.
- Heat history is a county average (NOAA nClimGrid-Daily), contiguous US only.
- Elevation and HAND come from a 30 m surface model; buildings and trees can distort them in towns.

## Networks
- Base: eip155:8453 (USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)
- Solana: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp (USDC EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v)