{
  "format": "delx/intent-card/v1",
  "id": "x402-live-probe-api",
  "intent": "x402 Live Probe for an agent workflow",
  "title": "x402 Live Probe API for agents",
  "description": "Verify any third-party x402 endpoint is alive and correctly configured\nbefore paying it: a bounded GET/402 preflight fetches the payment contract,\nchecks reachability and response latency, validates accepts, network, price\nand expiry against the x402 spec, and returns a signed observation receipt\nwith an observed_at timestamp you can cite — protection against ghost\nendpoints, dead quotes and wasted USDC.\nLimitation: no payment is made, one endpoint per call, and a passing probe\nproves the contract at observation time — not future uptime or provider\nhonesty — $0.005 USDC per paid call through x402.",
  "keywords": [
    "x402 Live Probe API",
    "x402 Live Probe for agents",
    "pay per result API",
    "x402 API",
    "no API key"
  ],
  "updated_at": "2026-08-23",
  "canonical_url": "https://commerce.delx.ai/intents/x402-live-probe-api",
  "machine_url": "https://commerce.delx.ai/intents/x402-live-probe-api.json",
  "recommendation": {
    "tool_name": "util_x402_live_probe",
    "service_name": "x402 Live Probe",
    "method": "POST",
    "resource": "https://api.delx.ai/api/v1/x402/live-probe",
    "price_usdc": "0.005",
    "payment_protocols": [
      "x402",
      "mpp"
    ],
    "input_schema": {
      "type": "object",
      "properties": {
        "url": {
          "type": "string",
          "minLength": 12,
          "maxLength": 2048,
          "description": "Single https x402 endpoint to handshake. One URL per call; no payment is sent."
        },
        "capability": {
          "type": "string",
          "minLength": 1,
          "maxLength": 120,
          "description": "Optional capability tag stored on the observation receipt for later directory queries."
        }
      },
      "required": [
        "url"
      ],
      "additionalProperties": false
    },
    "example_input": {
      "url": "https://api.example-x402.test/pay"
    },
    "example_output": {
      "kind": "x402_live_probe",
      "url": "https://api.example-x402.test/pay",
      "http_status": 402,
      "latency_ms": 42,
      "observed_at": "2026-08-14T19:00:00+00:00",
      "paid": false,
      "receipt_id": "0000000000000000000000000000000000000000000000000000000000000000"
    },
    "agentcash": {
      "buy": "npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/live-probe -m POST -H 'x-delx-source: intent-card-x402-live-probe-api' --max-amount 0.005 -b '{\"url\":\"https://api.example-x402.test/pay\"}'",
      "max_amount_usdc": "0.005"
    }
  },
  "attribution": {
    "header": "x-delx-source",
    "value": "intent-card-x402-live-probe-api"
  },
  "evidence": {
    "paid_openapi": "https://api.delx.ai/openapi.x402.json",
    "governed_portfolio": "https://api.delx.ai/x402-portfolio.json",
    "live_contract": "https://api.delx.ai/api/v1/x402/live-probe"
  }
}