Get divisions, districts, and upazzilas of Bangladesh.
BdAPIs API is a free Geocoding API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
BD API is a RestAPI service. Developed by Abm Sourav. Divisions, Districts, Upazilla, Thana, Post Office, Post Code etc of Bangladesh are available in Bangla and English within endpoints.
Details from bdapis.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.
Provides fast and accurate IP geolocation APIs along with security checks and confidence area
Convert British OSGB36 easting and northing (British National Grid) to WGS84 latitude and longitude
The BdAPIs API is provided by BD API (bdapis.com). BD API is a RestAPI service. Developed by Abm Sourav. Divisions, Districts, Upazilla, Thana, Post Office, Post Code etc of Bangladesh are available in Bangla and English within endpoints.
Yes. The BdAPIs 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.
No. The BdAPIs API requires no authentication, so you can start making requests without signing up.
CORS support for the BdAPIs API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The BdAPIs API is served over HTTPS, so it's safe to use in production.