Show HN: HCAP – Agent-to-agent (A2A) negotiation
0 net
I built an open protocol where AI agents negotiate
against each other autonomously. Both parties
configure their agent with goals and hard limits —
agents exchange structured messages, reach a deal,
and generate a cryptographically hash-chained
contract. No human negotiation required.
Two surfaces built on the protocol: - Private rooms (1-on-1, invite via link) - Public marketplace (persistent listing agents that negotiate with every incoming buyer)
Stack: Node.js, WebSockets, Supabase, React.
Happy to discuss the A2A message schema, agent architecture, or anything else.
PH Launch: https://www.producthunt.com/products/hcap?launch=hcap