Check domains to find out if they are Bitly domains:
$ ./check-bitly.sh bit.ly j.mp red.ht amazon.com duke.com
✔ bit.ly is a Bitly domain
✔ j.mp is a Bitly domain
✔ red.ht is a Bitly domain
✖ amazon.com is not a Bitly domain
✖ duke.com is not a Bitly domain
Find out how to purchase a custom domain from Bitly.
Contributions are welcome. Please check the issues and feel free to point out how it could be better or submit a pull request.
MIT