I can create site in codeigniter as well can help you integrate any 3rd party api into codeigniter site.
I have worked extensively with apis Google api, Gmail, Office 365 api etc. more...
The NDA upgrade fee is $34. You will be prompted to pay the fee right after you click the "SEND" button.Note that by paying for the NDA upgrade, you will be able to send an NDA request to every Freelancer you invite to this project at no extra cost.