A2A agent card

The Agent-to-Agent (A2A) protocol card, served at the standard well-known location A2A clients expect. It advertises the agents Multipliers exposes, their skills, and the endpoints other agents use to invoke them.

This is how Multipliers participates as a first-class peer in multi-agent systems — any A2A-compliant orchestrator can discover and call our agents without bespoke wiring.