75trust / 100

Product Check

by Product Purchasability Check in Search & web

x402 APIPassing, checked 4 h ago

Finds the contradictions on a caller-supplied product page that make a buying agent abort: offer price in JSON-LD or Microdata against the prices visible in the text, structured availability against sold-out and add-to-cart signals, JSON-LD against Microdata, variants that cannot be told apart, shipping cost and return period as data or only as prose. Returns a verdict with every contradiction and gap explained. Machine extractability, not price law; no checkout, no outbound request.

POST

https://api.ozdreamtools.de/api/product/check

Price: $0.15; per call in USDC
Uptime: 100%; last 30 days
Response time: 497 ms; 1.4 s slowest 5%
Last check: Passed; 4 h ago, next any minute now

Run a free test call How to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://api.ozdreamtools.de/api/product/check

Each call costs $0.15 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://api.ozdreamtools.de/api/product/check
content-type: application/json

{
  "html": "<!doctype html><html lang=\"de\"><head><title>Testartikel</title></head><body><div itemscope itemtype=\"https://schema.org/Product\"><h1 itemprop=\"name\">Testartikel</h1><div itemprop=\"offers\" itemscope itemtype=\"https://schema.org/Offer\"><meta itemprop=\"price\" content=\"49.90\"><meta itemprop=\"priceCurrency\" content=\"EUR\"><link itemprop=\"availability\" href=\"https://schema.org/InStock\"></div></div><p>Statt 59,90 € jetzt 39,90 €</p><button>In den Warenkorb</button></body></html>"
}

Parameters

Parameter	Type	Required	Description
`html`	string	Yes	Full HTML of one product page, as served (scripts are not executed)

Example response

The provider's example. We can't check it without paying.

Example response, 68 lines

{
  "availability": {
    "form": "url",
    "forms": [
      "url"
    ],
    "valid": true,
    "value": "https://schema.org/InStock"
  },
  "checked_at": "2026-09-02T12:00:00.000Z",
  "contradictions": [
    {
      "detail": "…",
      "key": "price_data_versus_visible"
    }
  ],
  "data_source": "microdata",
  "gaps": [
    {
      "detail": "…",
      "key": "shipping_not_as_data"
    },
    {
      "detail": "…",
      "key": "returns_not_as_data"
    }
  ],
  "legend": {
    "verdict": "…"
  },
  "not_checked": [
    "…"
  ],
  "price": {
    "as_data": true,
    "currency": "EUR",
    "microdata_value": 49.9,
    "value": 49.9
  },
  "products": {
    "count": 1,
    "jsonld_blocks": 0,
    "unambiguous": true
  },
  "returns": {
    "as_data": false,
    "days": null
  },
  "shipping": {
    "as_data": false,
    "fields": []
  },
  "variants": {
    "count": 0,
    "distinguishable": null,
    "formats_consistent": null
  },
  "verdict": "contradictory",
  "visible": {
    "add_to_cart_text": true,
    "prices": [
      39.9,
      59.9
    ],
    "shop_markers": true,
    "sold_out_text": false
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.15.

curl: see the payment challenge

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.ozdreamtools.de/api/product/check' \
  -H 'content-type: application/json' \
  --data-raw '{"html":"<!doctype html><html lang=\"de\"><head><title>Testartikel<\/title><\/head><body><div itemscope itemtype=\"https://schema.org/Product\"><h1 itemprop=\"name\">Testartikel<\/h1><div itemprop=\"offers\" itemscope itemtype=\"https://schema.org/Offer\"><meta itemprop=\"price\" content=\"49.90\"><meta itemprop=\"priceCurrency\" content=\"EUR\"><link itemprop=\"availability\" href=\"https://schema.org/InStock\"><\/div><\/div><p>Statt 59,90 \u20ac jetzt 39,90 \u20ac<\/p><button>In den Warenkorb<\/button><\/body><\/html>"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://api.ozdreamtools.de/api/product/check' \
  -H 'content-type: application/json' \
  --data-raw '{"html":"<!doctype html><html lang=\"de\"><head><title>Testartikel<\/title><\/head><body><div itemscope itemtype=\"https://schema.org/Product\"><h1 itemprop=\"name\">Testartikel<\/h1><div itemprop=\"offers\" itemscope itemtype=\"https://schema.org/Offer\"><meta itemprop=\"price\" content=\"49.90\"><meta itemprop=\"priceCurrency\" content=\"EUR\"><link itemprop=\"availability\" href=\"https://schema.org/InStock\"><\/div><\/div><p>Statt 59,90 \u20ac jetzt 39,90 \u20ac<\/p><button>In den Warenkorb<\/button><\/body><\/html>"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

JavaScript: pay and call

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.15 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.15" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.15 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.ozdreamtools.de%2Fapi%2Fproduct%2Fcheck&method=POST
const res = await pay("https://api.ozdreamtools.de/api/product/check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "html": "<!doctype html><html lang=\"de\"><head><title>Testartikel<\/title><\/head><body><div itemscope itemtype=\"https://schema.org/Product\"><h1 itemprop=\"name\">Testartikel<\/h1><div itemprop=\"offers\" itemscope itemtype=\"https://schema.org/Offer\"><meta itemprop=\"price\" content=\"49.90\"><meta itemprop=\"priceCurrency\" content=\"EUR\"><link itemprop=\"availability\" href=\"https://schema.org/InStock\"><\/div><\/div><p>Statt 59,90 \u20ac jetzt 39,90 \u20ac<\/p><button>In den Warenkorb<\/button><\/body><\/html>"
  }),
});
console.log(res.status, await res.text());

Python: pay and call

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.15 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.15"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.ozdreamtools.de/api/product/check",
        json={
            "html": "<!doctype html><html lang=\"de\"><head><title>Testartikel</title></head><body><div itemscope itemtype=\"https://schema.org/Product\"><h1 itemprop=\"name\">Testartikel</h1><div itemprop=\"offers\" itemscope itemtype=\"https://schema.org/Offer\"><meta itemprop=\"price\" content=\"49.90\"><meta itemprop=\"priceCurrency\" content=\"EUR\"><link itemprop=\"availability\" href=\"https://schema.org/InStock\"></div></div><p>Statt 59,90 \u20ac jetzt 39,90 \u20ac</p><button>In den Warenkorb</button></body></html>",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

When	Result	HTTP	Time	Price
4 h ago	Passed	402	497 ms	$0.15
9 h ago	Passed	402	528 ms	$0.15
15 h ago	Passed	402	406 ms	$0.15
20 h ago	Passed	402	490 ms	$0.15
25 h ago	Passed	402	564 ms	$0.15

Show 10 older checks

30 h ago	Passed	402	620 ms	$0.15
35 h ago	Passed	402	428 ms	$0.15
40 h ago	Passed	402	450 ms	$0.15
45 h ago	Passed	402	489 ms	$0.15
2 days ago	Passed	402	617 ms	$0.15
2 days ago	Passed	402	202 ms	$0.15
2 days ago	Passed	402	527 ms	$0.15
3 days ago	Passed	402	487 ms	$0.15
3 days ago	Passed	402	731 ms	$0.15
3 days ago	Passed	402	1.4 s	$0.15

Trust score 75/ 100

Availability (30-day uptime)		30 / 30
Valid x402 challenge		15 / 15
Response time		7 / 10
Real paying agents (30 days)		3 / 15
Charges what it lists		10 / 10
Security scan		10 / 10
Verified owner		0 / 10

How the score works

Payment terms

Price: $0.15 per call
Listed at: $0.15
Token: USDC
Networks: Base
Pays to: 0x4Dd5…C1Dc

Real usage

Paying agents: 1 in 30 days
Paid calls: 1 in 30 days
Last paid call: 3 days ago

Source: x402 Bazaar settlement data.

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Trust score

[![ToolVet trust score](https://toolvet.app/badge/product-check.svg)](https://toolvet.app/s/product-check)