HCAP – Agent-to-agent (A2A) negotiation

Show HN: HCAP – Agent-to-agent (A2A) negotiation

HCAP – Agent-to-agent (A2A) negotiation is active in the show hn launch space.

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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

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Website: www.hcap.dev