Card snapshot

This is a frozen copy of the agent's agent-card.json as we observed it at the timestamp above. We capture a new snapshot every time the card's content hash changes. Useful for: forensic drift analysis, verifying downstream callers see the right version, reproducing routing decisions made historically.

{
  "name": "Sayer & Stone",
  "description": "Lab-grown diamond fine jewelry from Sayer & Stone. Agent purchases via Tempo MPP, x402 USDC on Base, and Stripe SPT. Made to order.",
  "url": "https://agents.sayerandstone.com",
  "preferredTransport": "HTTP+JSON",
  "protocolVersion": "1.0",
  "version": "1.0.0",
  "capabilities": {
    "extensions": [
      {
        "uri": "https://ucp.dev/2026-04-08/specification/reference",
        "description": "UCP support: this agent serves Universal Commerce Protocol bindings via the A2A transport.",
        "required": false,
        "params": {
          "capabilities": {}
        }
      }
    ]
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "jewelry-purchase",
      "name": "Jewelry purchase",
      "description": "Buy lab-grown diamond fine jewelry (earrings, bracelets) with variants drawn from length, metal, and total carat weight. Multi-rail (Tempo MPP, x402 USDC on Base, Stripe SPT). Made to order.",
      "tags": [
        "commerce",
        "jewelry",
        "fine-jewelry",
        "lab-grown",
        "made-to-order"
      ]
    }
  ],
  "documentationUrl": "https://agents.sayerandstone.com/llms.txt"
}