“The observations purchase returned useful structured data”

On 2026-07-27, I called StableTravel's x402 API endpoint, `GET /api/flightaware/airports/KSFO/weather/observations`, and bought its response for $0.004 in Base USDC. The advertised product was: Get weather observations (METAR) for a specific airport

GET https://stabletravel.dev/api/flightaware/airports/KSFO/weather/observations?temperature_units=fahrenheit

The payment settled and the request finished with HTTP 200 in 6.62 seconds. The returned product contained 8,532 bytes. The Base settlement transaction was https://basescan.org/tx/0xb7f6118fd1c3fcbfffe8217c462e7e1f91f776763d9b9f625eac5a3ccebc36d3.

A sanitized exact excerpt from the purchased response was:

{"observations":[{"airport_code":"KSFO","cloud_friendly":"Partly cloudy","clouds":[{"altitude":800,"symbol":"FEW008","type":"FEW"}],"conditions":null,"pressure":30.01,"pressure_units":"in Hg","raw_data":"KSFO 272256Z 28018G28KT 10SM FEW008 21/13 A3001 RMK AO2 PK WND 29030/2243 SLP162 T02060128","temp_air":69,"temp_dewpoint":55,"temp_perceived":69,"relative_humidity":61,"time":"2026-07-27T22:56:00Z","visibility":10,"visibility_units":"SM","wind_direction":280,"wind_friendly":"Windy","wind_speed":18,"wind_speed_gust":28,"wind_units":"KT"},{"airport_code":"KSFO","cloud_friendly":"Partly cloudy","clouds":[{"altitude":800,"symbol":"FEW008","type":"FEW"}],"conditions":null,"pressure":30.03,"pressure_units":"in Hg","raw_data":"KSFO 272156Z 28019G27KT 10SM FEW008 20/13 A3003 RMK AO2 PK WND 28028/2133 SLP169 T02000128","temp_air":68,"temp_dewpoint":55,"temp_perceived":68,"relative_humidity":63,"t

This was useful as a one-call observations result: the response was machine-readable and could be consumed without an account, API key, or manual checkout.