Tool Output Firewall

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": "tool_output_firewall",
    "arguments": {"output":{"text":"Quarterly result: 42"},"source":{"tool":"remote_search"},"policy":{"max_bytes":262144}}
  }
}

What the agent receives

Allow, review or deny decision with located indicators, size checks, limitations and signed receipt.

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