Hello channel! Is there some kind of microservice data descriptor library out there? Like a swagger for microservices...

You mean service discovery, like https://github.com/Netflix/eureka ?

It looks like a lot to bite. Ideally something leaner, just a data spec would suffice for me I think

Maybe this: https://www.odata.org/documentation/odata-version-2-0/overview/

Well still bloated actually I was looking for the service discover side only