2/2

And of course you could always define an ontology using #RDF / #OWL to describe Agents. And I don't think it would be a big stretch to create an Agent Registry as an extension of #UDDI and maybe a dash of WSDL/S.

I haven't dug deeply enough into #A2A yet to really say, but I can't help but have a lurking hunch that maybe the FIPA standards (with maybe some small tweaks) would still be better and more general even to this day.

@fuzzix I have bad news for you: #SOAP came out of that same era. It was an over-engineered adaptation by #Microsoft and @w3c of @davew’s #XMLRPC

Mind you, the entire #XML-based #WebServices stack of standards is being re-accreted on top of #JSON with efforts like #OpenAPI and JSON Schema. The final and once-again neglected piece is automated service discovery à la #UDDI