
Automated time tracking leaderboards for programmers.
WakaTime API is a free Documents & Productivity API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
Developer reference documentation for the WakaTime API.
Details from wakatime.com.

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.
Zero-retention HTML to PDF conversion
Performs image upscaling by adding detail to images through multiple super-resolution algorithms
The WakaTime API is provided by WakaTime (wakatime.com). Developer reference documentation for the WakaTime API.
Yes. The WakaTime API is listed in the Documents & Productivity 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.
No. The WakaTime API requires no authentication, so you can start making requests without signing up.
CORS support for the WakaTime API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The WakaTime API is served over HTTPS, so it's safe to use in production.