Data Freshness Certificate

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": "data_freshness_certificate",
    "arguments": {"data":{"observed_at":4102444700,"source_uri":"https://example.com/data","content_sha256":"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"},"policy":{"maximum_age_seconds":300}}
  }
}

What the agent receives

Fresh or stale decision, age, threshold and data hash.

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