Machine-payable air-quality queries over x402 (HTTP 402). Global coverage: current US AQI and pollutants, an EPA-based verdict on outdoor exertion, and the cleanest window ahead for a session of a given length.
Free preview: /preview
Payment discovery: /.well-known/x402
Agent card: /.well-known/agent-card.json
Operated by ScalpStream. Air quality is modelled (Copernicus CAMS via Open-Meteo), not a street-level sensor reading; activity guidance follows US EPA AirNow categories and is not medical advice.