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The fitness API list

24 products, each with one page stating how it bills developers, what every end user has to own or pay for before data flows, and what approval stands between you and launch. 13 of the 24 carry an approval gate and 6 carry a cost on the user’s side — the two things that sink a schedule and are hardest to find in vendor documentation. There are no prices anywhere here by design: structures are stable, numbers are not, and a stale figure damages a citable source more than a missing one.

Free to start (18)

Fitbit, Garmin, Oura, WHOOP, Strava, Polar, HealthKit, Health Connect, Nutritionix, Edamam, FoodData Central, Open Food Facts, ExerciseDB, wger, QuickPose, MediaPipe, MoveNet, Apple Vision body pose

Free to call or with a free tier, per each entry. Free to start is not free to run: some carry approval gates or costs on the user’s side.

No approval documented (11)

Polar, Junction, Edamam, FoodData Central, Open Food Facts, ExerciseDB, wger, QuickPose, MediaPipe, MoveNet, Apple Vision body pose

No approval gate in the sources we checked, which is not the same as there being none.

Two of them side by side, with the same fields: compare any pair.

Depending on one of these? Watch it for changes and hear when a dated deprecation or terms change lands.

Each entry is generated from the same provenance-tracked model behind the cost planner and the State of Fitness APIs 2026 dataset, where every field is backed by a sentence already published on this site and anything unverifiable is left empty rather than guessed. The directory adds no new claims — it gives each product one address, and lists every page here that covers it.

Wearable APIs (direct)

Health-data aggregators

Platform health stores

Nutrition & food data

Exercise content

AI motion / coaching SDKs

Pose-estimation models

Independent directory, last reviewed 2026-08-22. Access terms, approval processes and membership requirements change often — confirm current details in each provider’s official documentation before you commit. Product and company names are trademarks of their respective owners; AIFitnessAPI is not affiliated with, endorsed by, or sponsored by any product listed here, with one exception stated on its own page: KinesteX funds this site.