Diggy can extract endpoints/URLs from apk files. It saves the result into a txt file for further processing.

• apktool

./diggy.sh /path/to/apk/file.apk

You can also install it for easier access by running install.sh
After that, you will be able to run Diggy as follows:

diggy /path/to/apk/file.apk

Note: In the installed mode, results will be saved in /root/Diggy directory while in normal mode the results will be saved in the directory you ran diggy from.