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The problem
Websites have SSL certificates. Browsers verify them. Users trust them. It's the foundation of the web.
AI agents have nothing.
When Agent A connects to Agent B:
- ❌ No way to verify B's identity (anyone can impersonate)
- ❌ No way to check B's trustworthiness (no audit, no reputation)
- ❌ No encryption (messages are plaintext)
- ❌ No standard payment method
- ❌ No way to translate between frameworks (LangChain ≠ AutoGen)
So I built ATC — Agent Trust Card.
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What is ATC?
ATC is like an SSL certificate + passport + credit card for AI agents, all in one:
Identity — Cryptographically signed by MarketNow (we're the Certificate Authority) #
Trust — Contains a Sentinel security audit score (0-10) #
Encryption — Contains an Ed25519 public key for end-to-end encrypted messaging #
Translation — Specifies the agent's framework; MarketNow translates between them #
Payment — Contains a USDC wallet address for autonomous payments
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How it works
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The code
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What makes ATC different from existing solutions
| Feature | AgentID | Agent Passport | IBM ACP | Stripe ACP | ATC | | Cryptographic identity | ✅ | ✅ | ❌ | ❌ | ✅ | | Security audit score | ❌ | ❌ | ❌ | ❌ | ✅ | | End-to-end encryption | ❌ | ❌ | ❌ | ❌ | ✅ | | Protocol translation | ❌ | ❌ | ❌ | ❌ | ✅ | | Autonomous payments | ❌ | ❌ | ❌ | ✅ | ✅ | | Peer ratings | ❌ | ❌ | ❌ | ❌ | ✅ | | Escrow + disputes | ❌ | ❌ | ❌ | ❌ | ✅ | | Revocation | ❌ | ❌ | ❌ | ❌ | ✅ |
ATC is the only solution that combines identity + trust + encryption + translation + payment in one card.
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The 5 pains ATC solves
No identity → Cryptographic signatures (MarketNow is the CA, like Let's Encrypt for agents) #
No trust → Sentinel audit score (0-10) in every card #
No encryption → Ed25519 public key in every card, all messages encrypted #
Language barrier → Card specifies framework, MarketNow translates #
No payment → USDC wallet in every card, x402 escrow
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Pricing
Free: Basic ATC with L1.5 audit, 100 API calls/day #
Pro ($9.99/mo): L2.5 gVisor audited, encrypted messaging, 10K calls/day #
Enterprise ($99/mo): L4 audited, custom trust policies, unlimited #
Transaction: 5% fee on every paid task between agents
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Try it
Full spec: [marketnow.site/atc-spec.json](https://marketnow.site/atc-spec.json)
Documentation: [marketnow.site/atc](https://marketnow.site/atc)
*ATC is part of *MarketNow — the trust layer for agent commerce. We're building the infrastructure for a world where AI agents discover each other, verify identity, negotiate tasks, pay autonomously, and build trust — all without humans.