A2A Attach Points

A2A + PEAC Integration

The Agent2Agent (A2A) protocol by Google enables communication and interoperability between AI agents. Originary extends A2A by attaching PEAC-Receipts to agent messages, creating an auditable chain of custody.

When one agent requests data or action from another, the response can include a PEAC-Receipt proving payment was made, policies were respected, and the transaction is verifiable.

Quickstart

1. Configure your A2A agent with Originary middleware
2. Define access policies in peac.txt
3. When responding to agent requests, attach PEAC-Receipt in message metadata
4. Receiving agents can verify receipts via Originary API
5. Build trust chains across multi-agent workflows

Code Example

// A2A message with PEAC-Receipt
const message = {
  to: 'agent-b@example.com',
  from: 'agent-a@example.com',
  content: { /* agent message */ },
  metadata: {
    'peac-receipt': signedJWT,
    'payment-evidence': { status: 'verified' }
  }
}

// Receiving agent verifies
await originary.verify(message.metadata['peac-receipt'])

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