Worldwide geocoding, geoparsing and autocomplete for addresses.
Geocodify.com API is a free Geocoding API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Geocodify is a free, simple-to-use, enterprise-grade worldwide geocoding, geoparsing and maps api that allows you to build location aware applications.
Details from geocodify.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.
Open geospatial data and API service for Greece
The Geocodify.com API is provided by Geocodify (geocodify.com). Geocodify is a free, simple-to-use, enterprise-grade worldwide geocoding, geoparsing and maps api that allows you to build location aware applications.
Yes. The Geocodify.com API is listed in the Geocoding 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 Geocodify.com API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Geocodify.com API supports CORS, so front-end JavaScript can call it directly.
Yes. The Geocodify.com API is served over HTTPS, so it's safe to use in production.