World Cities Database
We're proud to offer a simple, accurate and up-to-date database of the world's cities and towns. We've built it from the ground up using authoritative sources such as the NGIA, US Geological Survey, US Census Bureau, and NASA.

https://kraa.io/termsandconditions

You can use a personal access token in place of a password when authenticating to GitHub in the command line or with the API.