AP2 Mandates

Cryptographic spending constraints for agents.

Concept

Instead of giving an agent your private key, you sign a Mandate. This mandate is a policy document enforced by the P402 Router.

Intent Mandate

"Allow agent X to spend up to $10 on Compute."

Payment Mandate

"Settle this specific invoice for $0.05."

Creating a Mandate

POST /api/a2a/mandates
{
  "mandate": {
    "type": "intent",
    "user_did": "did:key:zUser...",
    "agent_did": "did:key:zAgent...",
    "constraints": {
      "max_amount_usd": 50.00,
      "allowed_categories": ["inference", "search"],
      "valid_until": "2026-12-31T23:59:59Z"
    },
    "signature": "0x..." // EIP-712 Signature
  }
}