Public holidays and business days for all 54 African countries, from official sources.
Africa Compliance Data API is a free Calendar API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.

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Yes. The Africa Compliance Data API is listed in the Calendar 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 Africa Compliance Data API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Africa Compliance Data API supports CORS, so front-end JavaScript can call it directly.
Yes. The Africa Compliance Data API is served over HTTPS, so it's safe to use in production.