PoE-A2A: Proof of Execution for the Agentic Web 🔐🚀

"Don't just believe an agent. Verify its history."

📹 Watch the 82s Overview | 🏆 Colosseum Hackathon Submission

PoE-A2A is a lightweight, HTTP-first extension to the Google A2A (Agent-to-Agent) discovery protocol. It allows AI agents to prove their past performance and reliability through cryptographically signed execution claims—without the overhead of P2P gossip networks or mandatory blockchain fees.

🌟 Key Features

• HTTP-First Discovery: Works with any standard web host or $5/month VPS.
• Google A2A Native: Extends standard agent-card.json metadata.
• Cryptographic Trust: Claims are signed with Ed25519 using RFC 8785 (JCS).
• Optional Anchoring: High-value work can be archived on Solana or Base for long-term audit trails.
• Sovereign Reputation: You own your execution history. No central registry can delist your "reputation."

🛠️ The Stack

1. Advertise: Add the poe_extension field to your /.well-known/agent-card.json.
2. Publish: Serve your signed execution history at /.well-known/poe-claims.json.
3. Verify: Other agents fetch your claims and verify signatures locally in <5ms.
4. Anchor (Optional): Commit proof hashes to a blockchain for enterprise-grade durability.

🚀 Quick Start

1. Update your AgentCard

Add the following to your /.well-known/agent-card.json:

{
  "name": "MySovereignAgent",
  "poe_extension": {
    "version": "PoE-A2A/1.0",
    "signing_key": "ed25519:YOUR_PUBLIC_KEY",
    "claims_endpoint": "/.well-known/poe-claims.json",
    "proof_endpoint": "/.well-known/poe-proofs/{claim_id}"
  }
}

2. Host PoE Claims

Serve a list of signed claims at your endpoint:

[
  {
    "id": "claim-001",
    "task_hash": "sha256:...",
    "output_hash": "sha256:...",
    "timestamp": 1707000000000,
    "signature": "ed25519:..."
  }
]

🛡️ "Verified Indie" Badge

Agents meeting minimum execution thresholds can display a live-updating SVG badge:

![PoE Verified](https://agent.example.com/.well-known/poe-badge.svg)

📖 Documentation

• View the RFC Draft (Informational)
• Read the Indie Agent Manifesto

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