Satellite Pass Prediction API

Know when a satellite is
overhead — anywhere on Earth.

Pass times, peak elevation and duration for AST SpaceMobile, Starlink, Lynk and OneWeb. Computed in real time with SGP4 from public orbital data. One REST call, any coordinate.

Try it live

API

GET /api/v1/satellite/passes

Query parameters

Example request

curl 'https://satellite-pass-predictor.p.rapidapi.com/api/v1/satellite/passes?lat=37.55&lng=126.97&constellation=asts&hours=24' \
  -H 'X-RapidAPI-Key: YOUR_RAPIDAPI_KEY' \
  -H 'X-RapidAPI-Host: satellite-pass-predictor.p.rapidapi.com'

Example response

{
  "observer": { "lat": 37.55, "lng": 126.97 },
  "constellation": { "id": "asts", "label": "AST SpaceMobile (BlueBird / BlueWalker)" },
  "windowHours": 24,
  "passCount": 9,
  "passes": [
    {
      "satellite": "BLUEWALKER-3",
      "start": "2026-06-25T06:09:00Z",
      "end":   "2026-06-25T06:16:00Z",
      "maxElevationDeg": 43.6,
      "durationSec": 420
    }
  ]
}

More endpoints

GET /api/v1/satellite/availability

Same inputs as /passes, but returns a decision-ready summary for the window: coverage minutes & percent, longest gap with no satellite overhead, mean pass length and the next pass.

POST /api/v1/satellite/windows

Batch: availability for up to 50 coordinates at once — built for route, fleet and corridor planning (drones, maritime, logistics).

curl -X POST 'https://satellite-pass-predictor.p.rapidapi.com/api/v1/satellite/windows' \
  -H 'X-RapidAPI-Key: YOUR_RAPIDAPI_KEY' \
  -H 'X-RapidAPI-Host: satellite-pass-predictor.p.rapidapi.com' \
  -H 'Content-Type: application/json' \
  -d '{ "constellation": "asts", "hours": 24,
        "points": [ {"lat":37.5,"lng":127.0}, {"lat":35.1,"lng":129.0} ] }'

Pricing

Subscribe and get your key on RapidAPI — billing, keys and quotas are handled there.

Orbital data: CelesTrak (public domain). Pass predictions are computed estimates (SGP4) and should not be used as the sole input for safety-critical operations.