Quote Freshness Guard

Try before payment

Inspect a representative partial result, exact price and copy-ready upgrade instructions. No wallet, signature or payment required.

Copy-ready MCP call

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "quote_freshness_guard",
    "arguments": {"quote":{"expires_at":4102444800,"network":"eip155:8453","amount":"2000"},"minimum_validity_seconds":30}
  }
}

What the agent receives

Fresh or stale decision, remaining lifetime and immutable quote digest.

No API key or subscription. The first paid request returns HTTP 402 payment requirements; an x402 client signs and retries automatically.