AirScout

https://airscout.scalpstream.com/a2a

● healthy a2a-agent

Machine-payable air-quality queries over x402. Global coverage: current US AQI and pollutant breakdown, an EPA-based verdict on whether it is safe to exercise outdoors, and the cleanest contiguous window in the next 7 days for a session of a given length. Modelled data (Copernicus CAMS), not a street-level sensor.

Quality grade

How grading works

B 67.5 / 100

Availability 40.0 / 40

Endpoint responded (HTTP 302)

Payability 20.0 / 20

✓ Answers a real HTTP 402 challenge
✓ Publishes a /.well-known/x402 descriptor
✓ Payment address on record
✓ Settlement network declared
✓ Price declared

Demand 4.5 / 40

0 distinct payers, 22 USDC transfers in the last 30 days

Owner verified 3.0 / 3

Operator proved control of this domain

Endpoint last checked 9 h ago. On-chain activity last read 11 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402

curl -sS -i -X GET https://airscout.scalpstream.com/a2a  # expect HTTP 402 Payment Required (about 0.01 USDC/call)

/.well-known/x402.json

https://airscout.scalpstream.com/.well-known/x402

Listed in

Directories this entry was found in.

a2a