{"name":"Kansai ADS-B Live API — data documentation","coverage":{"center":{"lat":34.8,"lon":135.6,"note":"Osaka area, Japan (approximate, ~10km)"},"radius_km":"up to ~250 depending on altitude and terrain","region":"Kansai / western Japan airspace","freshness":"~1s for /aircraft; 60s granularity for /history","history_retention_days":90},"field_dictionary":{"hex":"ICAO 24-bit aircraft address (unique per airframe)","flight":"callsign as broadcast, may have trailing spaces (e.g. 'ANA986')","r":"registration (tail number, e.g. JA218A)","t":"aircraft type code (e.g. B738 = Boeing 737-800)","desc":"human-readable aircraft type","lat_lon":"WGS84 position in decimal degrees","alt_baro":"barometric altitude [ft]; alt_geom: geometric altitude [ft]","gs":"ground speed [kt]; ias/tas: indicated/true airspeed [kt]; mach: Mach number","track":"true track over ground [deg]; mag_heading/true_heading [deg]","baro_rate_geom_rate":"vertical rate [ft/min]","squawk":"transponder code (7500/7600/7700 = emergency)","category":"ADS-B emitter category (A0-A7: A1=light, A3=large, A5=heavy, A7=rotorcraft)","seen_seen_pos":"seconds since last message / last position","nic_nac_sil":"position integrity/accuracy quality indicators","route":"resolved from official airline timetables: flight_no, origin/destination (IATA), cities, verified flag — only present when the callsign is known","history_series":"ts (unix sec, 60s granularity), lat, lon, alt_baro [ft], gs [kt], track [deg], baro_rate [ft/min], flight, r, t, squawk"},"pricing":{"per_request":"$0.001 for /aircraft, $0.01 for /history/flight — pay-per-call via x402, no signup","hourly_pass":"$0.50 for /pass/hour — returns a bearer token for unlimited /live/* access for 1 hour (best for continuous polling / radar apps)"},"source":"Independently received ADS-B broadcasts (readsb) at a single station. Raw as-received data: coverage gaps, position jumps and missing fields occur. Aircraft not equipped with ADS-B do not appear.","disclaimer":"NOT for operational, navigation, or safety-of-life use. No warranty of accuracy, completeness, or availability. Data reflects only what this single receiver hears.","terms":"Attribution appreciated ('Kansai ADS-B Live API'). Do not misrepresent the data as an official source."}