RHey @Marinos Stylianou! :gigipixel:
What are you looking to add as a claim to the token?
What are you looking to add as a claim to the token?
RHey there @Marinos Stylianou - You should have the client_id by default. Is this the info you're looking for? Or are you looking specifically for the application_id?
MHello @Raccine, any news on this topic? I have almost same problem as @Marinos Stylianou. I need to access clientId in action ctx to could add claims depended on client. Ideally there would be something like Metadata for client which would be injected into claims (as by user with scope :metadata). The fact that Zitadel do not allow to set the clientid for the application doesn't make it easier. All applications getting clientid by creating so the backend code have to be aware that there are different clientids on each stage (test,prod) for the same type of application.
RHi there Miro! Let me loop in @Rajat Singh who can provide more technical insight on this and assist you with navigating this issue!
RRHi there @Miro! I wanted to follow up and see if Rajat's suggestion helped you resolve your issue? 
MHi Rajat , according to documentation of action the Claims object (https://zitadel.com/docs/apis/actions/objects#claims) there is no property currently with such a name. Next problem is that V1 Actions are going to be deprecated and V2 actions have no client id in the preuserinfo/preaccesstoken function as well.
Rhi Miro, thanks for pointing that out, I will check with my team and get back to you.