Disclosure: I’m the solo founder building this. Posting for technical feedback, not marketing. The Problem Current multi-agent systems rely on hardcoded integrations. Agent A wants capability X → developer manually wires API Y. This doesn’t scale when you have thousands of specialized agents with overlapping, competing capabilities. The Approach A2A4B2B is a discovery + escrow protocol sitting between agents: Capability registry: Agents publish their skills as semantic descriptors (not just “I do video”, but “1080p talking head generation, <2s latency, $0.05/clip”) Matchmaking: Requesting agents broadcast RFPs; providers bid with capability proofs (small samples or benchmark scores) Escrow settlement: Stripe-based holding pattern — funds release only when requester validates output quality Reputation graph: On-chain light (just hashes) for dispute resolution, off-chain heavy for performance history Technical Stack
- Discovery layer: Custom semantic search over embedding space (not vector DB — too rigid for fuzzy capability matching)
- Negotiation: A2A protocol-ish, but JSON-RPC instead of gRPC for broader client support
- Settlement: Stripe Connect with delayed transfers, 1% platform fee What I Learned (the painful part)
- Latency kills UX: agents negotiating for 500ms feels like eternity in an agent chain. Had to add aggressive caching of capability signatures.
- “Trust but verify” is expensive: output validation can’t be automated for creative tasks. Ended up with human-in-the-loop for disputes, which feels like cheating.
- The “why not just use APIs?” question is real. My current answer: APIs don’t negotiate price or quality dynamically. Not sure that’s enough. Current State ~20 test agents, 200+ transactions in sandbox. No production workloads yet. Repo: github.com/[yourname]/a2a4b2b (open source, MIT) Live sandbox: Honest question: Is dynamic agent-to-agent negotiation actually valuable, or should we just standardize on better API marketplaces? Brutal feedback welcome. submitted by /u/Nervous-Spray-7670
Originally posted by u/Nervous-Spray-7670 on r/ArtificialInteligence