Race data for developers.
Marathon Scout is opening early access to an API for marathon, half-marathon, and ultramarathon data.
Build race finders, calendars, planning tools, and other runner products without assembling the same information from scratch.
Search races
Find marathons, half marathons, and ultras by date, place, distance, and Boston-qualifier status.
Race details
Use known dates and date status, official race and registration links, results, and live tracking when available.
Updates and accuracy
We monitor official sources daily and may publish changes throughout the day. Important details should still be confirmed with the race or timing provider.
What may come next
MCP access and other developer formats may follow. Early-access requests will help decide what to build next.
Request early access
What will you use the API for?
Tell us the product, project, or use case you have in mind. We will contact a small group of early users first.