Free preview
Try the API and prototype an integration.
100requests / UTC day
- 10 requests per minute
- 1 API key, rotatable
- Passes, tracks, Doppler, visibility
- Batch up to 25 predictions(10 per call on this plan)
Pay for calls, not for orbital mechanics
Every plan gets the same predictions: the same propagation, the same validation, the same freshness of elements. Plans differ only by how many calls they allow.
Plans
One key per plan · quotas in UTCPaid plans are not open yet. The quotas below are the ones the API enforces; the prices will be shown here, and again by Stripe with taxes before any confirmation, when payments open. Until then, the free preview is the way in.
Hobby
A ground station, a club tracker, a personal dashboard.
25,000requests / UTC calendar month
- 30 requests per minute
- 1 API key, rotatable
- Passes, tracks, Doppler, visibility
- Batch up to 25 predictions
Pro
A product that serves predictions to its own users.
250,000requests / UTC calendar month
- 120 requests per minute
- 1 API key, rotatable
- Passes, tracks, Doppler, visibility
- Batch up to 25 predictions
| Limit | Free preview | Hobby | Pro |
|---|---|---|---|
| Requests | 100 / day | 25,000 / month | 250,000 / month |
| Per minute | 10 | 30 | 120 |
| Resets | 00:00 UTC every day | 00:00 UTC on the 1st | 00:00 UTC on the 1st |
| Keys | 1 | 1 | 1 |
This website
No key, no accountThe predictor on this site calls the same engine without a key. Every visitor shares one anonymous budget of 200 requests a day and 20 a minute, so on a busy day it can run out before midnight UTC. That budget is for people looking at the sky, not for integrations: there is no anonymous batch endpoint.
How quotas count
- When does a monthly quota reset?
- At 00:00 UTC on the first day of each calendar month - not on your subscription anniversary. The first, partial month has the full quota.
- Does a cached answer count?
- Yes. A call is a call, whether it was propagated or served from the prediction cache.
- How does a batch count?
- One request per prediction (satellites × sites), failed entries included, against every limit. A batch that does not fit the remaining quota is refused whole and consumes nothing.
- What happens at the limit?
- A 429 with
Retry-After,resetsAtand whichlimitwas reached. There is no overage billing: nothing is ever charged beyond the plan. - Do upgrades or key rotation reset usage?
- No. Usage belongs to the account's month; changing plan, rotating or revoking a key never resets it.
- Is there an SLA?
- Not yet. The service runs on an instance that can sleep, and an SLA would be a sentence rather than a commitment until it does not. See the live status.