# SolarPulse — Solar Payback Calculator
> Solar payback estimate for any US address. $0.10/estimate via x402.

## Endpoints
- GET /v1/estimate?address={address} — Full solar estimate ($0.10 for agents, $0.10 for all)
- GET /v1/irradiance?lat={lat}&lon={lon} — Raw NASA POWER irradiance data ($0.10)
- GET /v1/rates?zip={zip} — Utility rate lookup ($0.10)
- GET /v1/incentives?state={state} — Federal/state incentives ($0.01)
- POST /v1/lead — Lead capture ($0.01)

## Payment
Protocol: x402 (HTTP 402)
Price: $0.10/estimate (100000 atomic USDC)
Chains: Solana, Base (USDC)
Demo: 5 demo estimates/day via landing page. Full access requires x402 or API key.

## Data Sources
- NASA POWER (solar irradiance)
- USGS 3DEP (terrain/elevation)
- NOAA (weather patterns)
- EIA-861 (utility rates)

## Example
GET https://solarpulse.waltsoft.net/v1/estimate?address=1234+Elm+St,+Austin+TX+78701