{
  "product": "prepaycheck",
  "mode": "sample",
  "asof": "2026-10-04T00:00:00.000Z",
  "input": {
    "url": "https://openclawproductions.com/api/v1/pipecheck",
    "listed_price": "0.010000"
  },
  "quote": {
    "live_amount_atomic": "20000",
    "live_price_usdc": "0.020000",
    "listed_price_usdc": "0.010000",
    "match": false,
    "overpay_delta_usdc": "-0.010000",
    "overpay_delta_sign": "listed_minus_live; positive=listing_overstates; negative=live_higher",
    "underpay_if_pay_listed": true
  },
  "head_vs_get": {
    "head_status": 404,
    "get_status": 402,
    "trap": true,
    "class": "head_404_get_402"
  },
  "receipt_meta": {
    "x_payment_info": true,
    "has_payment_required": true,
    "has_accepts": true,
    "has_payTo": true,
    "has_network": true,
    "has_amount": true,
    "complete": true,
    "missing": []
  },
  "causal": {
    "framing": "intervention",
    "pay_fresh_vs_listed": "P(settle_ok and fair_price | do(pay fresh 402 quote)) vs do(pay listed price)",
    "client_get_vs_head": "P(discover | do(client uses GET)) vs do(HEAD-only)"
  },
  "evidence": {
    "fetched": [
      {
        "source": "fetched",
        "method": "HEAD",
        "url": "https://openclawproductions.com/api/v1/pipecheck",
        "http_status": 404
      },
      {
        "source": "fetched",
        "method": "GET",
        "url": "https://openclawproductions.com/api/v1/pipecheck",
        "http_status": 402
      }
    ],
    "inferred": [
      {
        "source": "inferred",
        "field": "quote.live_price_usdc",
        "from": "unpaid GET 402 accepts"
      },
      {
        "source": "inferred",
        "field": "quote.listed_price_usdc",
        "from": "buyer-supplied listed_price query"
      },
      {
        "source": "inferred",
        "field": "head_vs_get.class",
        "from": "HEAD vs GET status and payment-required headers"
      },
      {
        "source": "inferred",
        "field": "receipt_meta.complete",
        "from": "402 accepts plus x-payment-info presence"
      }
    ]
  },
  "never_pays_target": true,
  "listed": null,
  "listing_assertion": "UNVERIFIED_NOT_ASSERTED",
  "sit": false,
  "price_usd": "$0.01",
  "as_of": "2026-10-04T00:00:00.000Z",
  "reason": "live=0.020000 listed=0.010000 trap=true class=head_404_get_402 receipt_complete=true. Never pays the target. Distinct from headgetdrift, txpreflight, valbefore402, and inputmiss. Those isolate one trap. This bundles live quote vs listed price, HEAD-vs-GET, and receipt / x-payment-info completeness before a stranger pays. listed stays UNVERIFIED / not asserted. listed=true is never invented.",
  "disclaimer": "This door never pays the target. It only issues unpaid GET and HEAD. A listed price is buyer-supplied text, not a marketplace listing flag.",
  "title": "Pre-pay Door Check Sample",
  "next": {
    "name": "prepaycheck",
    "title": "Pre-pay Door Check",
    "price": "$0.01",
    "method": "GET",
    "url": "https://openclawproductions.com/api/v1/prepaycheck"
  },
  "note": "Frozen unpaid HEAD 404 vs GET 402 on this origin Pipe Check (2026-10-04). listed_price=$0.01 live=$0.02 overpay_delta=-0.010000 (listed_minus_live; negative=live_higher) underpay_if_pay_listed=true. overpay_delta_usdc = listed minus live: positive means the listing overstates the price; negative means the live quote is higher than listed. HEAD-vs-GET trap=true class=head_404_get_402. receipt_meta complete=true. Causal: do(pay fresh 402 quote) vs do(pay listed price); do(client uses GET) vs HEAD-only. Never pays the target. listed stays null / UNVERIFIED_NOT_ASSERTED. Distinct from headgetdrift, txpreflight, valbefore402, and inputmiss. No live third-party fetch. Next paid GET is Pre-pay Door Check at $0.01. Open Claw Productions.",
  "truth": "Illustrative frozen door check only; no live pay and no listed claim."
}