VincentGabou Yes, the rest call you referenced is the one you would use to give a me too. I believe a value of -1 is what we consider "not helpful" and a value of 1 is considered to be helpful.
Add (or change) the Me Too on a Question:
/messages/id/<message-id>/ratings/key/question_metoo/ratings/add?rating.value=1
Revoke the Me Too on a Question:
/messages/id/<message-id>/ratings/key/question_metoo/ratings/revoke
clemlith If this is used in the context of a custom component, as freemarker code, then the call will be made as the current user. If made via REST over HTTP then you would need to use one of our auth mechanisms to make the call as the current user. One of the mechanisms is to pass a sso.authentication_token along with the request (if you are using SSO). This token can be generated by using a REST call (see links below for more details). Please note that the sso.authentication_token is different that the token (aka ticket) used by the application that you saw in the out-of-the-box UI (ticket=aMivVgLAcKnS_11676). The token used by the out-of-the-box UI is not intended to be used for REST or for customizations. Also, the action links in the OOTB UI are not intended to be used when building customizations, the REST API should be used in those cases.
Auth for Non SSO:
http://community.lithium.com/t5/Single-Sign-On-SSO/Authenticating-via-REST-API-non-SSO/ta-p/61862
Auth for SSO:
https://community.lithium.com/t5/Community-API/bd-p/developers-rest-api?page=authentication#sso
