Swashbuckle Client Meta Informations

Hi there,

I am working on an API to trans fair my own message types called "actions" to different computers who will authenticate to my API with the same certificate. 

For example, I have a queue of actions. {id990 - id999}

PC 1 want to get the newest action(id999)

PC 2 is a bit slower and still need action(id990)

How could I get the information of PC 1 and PC 2, to identify them, so that I can handle who have already got the action and who not ?

 Is there a best Practice?

Can I identify PC 1 and PC 2 in any way? Hostname, IP Address, Cookies or similar?

Kind Regards
Ben