Activity API



For Use By: Third-party developers can use the API to build applications to distribute events and activities from the database.

The Activity APIs give developers easy access to's broad array of activity data. It is centered around the concept of "assets", where events, races, tournaments, facilities, classes, leagues are all considered assets. Each asset has a unique ID, and data about a given asset can be retrieved with this ID.

With the Activity Search API, developers can search for all half marathons coming up over the next few months in San Diego, California. Or they can get a list of tennis tournaments happening in New York over the summer. They can dive in to get detailed information about the Bay to Breakers, including the event director's race description, latitude and longitude for the starting point of the race, and fees. And after the Bay to Breakers happens, the APIs can be used to query user reviews of the race.

All of the APIs are read-only and return public data. As a result, no security measures (SSL, Oauth) are required. Race Registrations are done online on

Documentation & API Keys

To access the API documentation and register for a key, check out the specific API documentation pages below:

Request Limits

 Activity API Key  APPLY FOR A KEY

  • Active - Upon registration
  • Throttle Rate - 2 calls per second
  • Quota Limit – 10,000 calls per day

Interact with the Active APIs -- discover, test, debug live calls all in one place. Test out I/O Docs here

About is the leading online community for people who want to discover, learn about, share, register for and ultimately participate in activities about which they are passionate. Millions of active individuals visit each month to search and register online for races, team sports and recreational activities; interact with others who have similar interests; start online training programs; and access nutrition, fitness and training tips.


Events and activities with online registration available. The following types of events and activities are accessible via this API:

Endurance:  Running, cycling, swimming, triathlons, duathlons, walking, mountain biking.

Team Sports: Baseball, basketball, soccer, football, hockey, lacrosse, softball.

Youth Camps:  Day camps, overnight camps, youth sports camps.

Tennis Leagues:  USTA sanctioned leagues, tournaments, clinics.

Parks & Recreation: City & county parks, recreational activities, YMCAs, JCCs, Boys and Girls Clubs.

Fitness:  Aerobics, dance, zumba, yoga, Pilates, ballet.

Classes: Crafts, painting, drawing, ceramics, performing arts, photography, theater.

Outdoor Adventure:  Sailing, hiking, climbing, kayaking, rafting, fishing, hunting.

Business Events: Business events/conferences, networking events, workshops, seminars.