HPR Motor Finder
Live motor stock and pricing across the major U.S. vendors, in one searchable view.
HPR Motor Finder pulls high-power rocketry motor availability from the major U.S. vendors into one searchable view. It scrapes vendor sites on a schedule, normalizes every listing against the ThrustCurve catalog, and shows you who has a given motor in stock — so finding an in-stock reload doesn't mean opening ten tabs.
Beyond stock, it tracks pricing over time, suggests in-stock substitutes when a motor is sold out everywhere, overlays thrust curves for side-by-side comparison, and can email you when a motor restocks. The underlying data is also available as a free, no-auth JSON API.
What it does
Unified catalog
Search and filter every tracked AeroTech, Cesaroni and Loki motor across vendors in one place.
Cross-vendor stock
See who has a motor in stock right now without checking each store yourself.
In-stock substitutes
When a motor is sold out everywhere, find the closest available alternative by flight profile.
Pricing history
Compare prices across vendors and see how they've moved over time.
Thrust curves
Per-motor thrust curves, with side-by-side comparison of up to four motors.
Restock alerts
Get an email the moment a sold-out motor comes back in stock.
Order planning
Plan a multi-motor order across vendors, accounting for shipping.
Free JSON API
Public, no-auth API of the live stock and pricing data — no rate limits.
Try it out
Free to use, no account required.