Interactive map with detailed places and information portal in Thailand.
Longdo Map 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.
Details from map.longdo.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.
The Longdo Map API is provided by Longdo Map API (map.longdo.com).
Yes. The Longdo Map 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 Longdo Map API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Longdo Map API supports CORS, so front-end JavaScript can call it directly.
Yes. The Longdo Map API is served over HTTPS, so it's safe to use in production.