API for recording and tracking habits or effort, routines.
Pixela API is a free Tracking API that requires X-Mashape-Key authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Record habits, effort, and precious memories with a simple API, then grow them into vivid graphs.
Details from pixe.la.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
An API to query Brazilian ZIP codes and orders easily, quickly and free
The Pixela API is provided by Pixela (pixe.la). Record habits, effort, and precious memories with a simple API, then grow them into vivid graphs.
Yes. The Pixela API is listed in the Tracking category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Pixela API uses X-Mashape-Key authentication, so you need to register for credentials before making requests.
Yes. The Pixela API supports CORS, so front-end JavaScript can call it directly.
Yes. The Pixela API is served over HTTPS, so it's safe to use in production.