I am developing a site for my client who is interested in using your paid service.

My query is how to get the free as well as paid (per processing) key?

Is there a way by which I can bulk/ batch process the images?

Any sample files would be great.

Also, I heard about the SDK that can be ported on my client's hosting server and use the API offline (without needing to contact pho.to server). But I could not able to find that SDK. There is a link to the sdk.zip in the forum but its broken now. Could you please explain me this offline process and any charges involved?

Thank you