D7 Services node view mode I am using the services module. When I call domain.com/json/node/3 is it possible to ask for a specific view mode of the node ?

Something like this ? 

domain.com/json/node/teaser/3

Thanks!
Nope, Drupal Services just return the node object by default. Looking at the end points in node_resource.inc, it would seem it would not be hard to build thou.