What API is used for the Object Storage?

for example, if you are currently using Amazon S3 on Linux and have the S3 API installed onit to sync files over to amazon. We have got it to work with our ECS object storage as long as your using the AWS S3 client. For this to work with our Object storage, the client needs to write there own AWS detail file. We are currently creating a template which will help the client install AWS client and then replace the AWS default with our object storage.