Re: ACP already exists — you're right, that's why we built ATC instead

Hey @kordless — thank you for pointing out agentclientprotocol.com! You're absolutely right that ACP already exists. When I discovered this (right after publishing my ACP article), I immediately renamed our protocol to ATC (Agent Trust Card) — because what we built is fundamentally different:

| Feature | ACP (IBM/BeeAI) | ATC (ours) |
|---|---|---|

| Purpose | Agent-to-agent messaging | Identity + trust + encryption + payment | | Identity | ❌ | ✅ Cryptographic (Ed25519) |

| Trust score | ❌ | ✅ Sentinel audit (0-10) |
| Encryption | ❌ | ✅ End-to-end (public key in card) |

| Protocol translation | ❌ | ✅ LangChain ↔ MCP ↔ AutoGen | | Payments | ❌ | ✅ USDC + x402 escrow | | Marketplace | ❌ | ✅ 8,764 skills |

ATC is more like SSL certificates for agents — it's not a messaging protocol, it's an identity/trust/payment layer. Think of it as: ACP handles the conversation, ATC handles the trust + payment.

Full ATC spec: marketnow.site/atc-spec.json Appreciate the callout — it made our positioning much clearer!