Cannot read property 'call' of undefined

Calling IO3D.services results in:

Uncaught (in promise) TypeError: Cannot read property 'call' of undefined

version: https://3d.io 1.0.0-beta.22 (@master #274adf0 2017/08/02 10:16)

What i tried:

IO3D.services.call('Model.search', {
    arguments: {
        organizationResourceId: <my_organisationResourceId>,
        folderResourceName: '<my_folder_name>',
    },
}).then(console.log)

So is the services-api not available yet?