79trust / 100
Verify Offer
by offercheck in Security & trust
x402 APIPassing, checked 1 h ago
Verify the live price and availability of a product at a URL before you buy or quote it. Fetches the page now, extracts price/currency/availability from JSON-LD, Shopify JSON, OpenGraph or microdata, and returns evidence (method, snippet, content hash, fetch time) plus a confidence score. $0.01 per check.
GET https://offercheck.offercheck.workers.dev/v1/verify/offer
Last 30 days
All checks passedSome failedAll failedNot checked
- Uptime
- 100%
- Response time
- 329 ms typical, 506 ms slowest 5%
- Last check
- 1 h ago
- Next check
- any minute now
How to call it
# See the payment challenge (nothing is charged)
curl -i -X GET "https://offercheck.offercheck.workers.dev/v1/verify/offer?url=https%3A%2F%2Fshop.example.com%2Fproducts%2Fwidget"import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
const client = new x402Client().register(
"eip155:8453",
new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);
// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Foffercheck.offercheck.workers.dev%2Fv1%2Fverify%2Foffer
const res = await pay("https://offercheck.offercheck.workers.dev/v1/verify/offer?url=https%3A%2F%2Fshop.example.com%2Fproducts%2Fwidget");
console.log(await res.json());Example input
{
"url": "https://shop.example.com/products/widget"
}Example output
{
"confidence": 0.9,
"evidence": {
"bytes": 84210,
"content_sha256": "…",
"content_type": "text/html; charset=utf-8",
"fetched_at": "2026-09-25T20:00:00.000Z",
"method": "json-ld",
"snippet": "{\"@type\":\"Product\",\"offers\":{\"price\":\"19.99\",\"priceCurrency\":\"USD\",\"availability\":\"https://schema.org/InStock\"}}"
},
"final_url": "https://shop.example.com/products/widget",
"http_status": 200,
"ms": 812,
"offer": {
"availability": "in_stock",
"currency": "USD",
"price": 19.99
},
"product": {
"brand": "Example",
"name": "Example Widget",
"sku": "W-100"
},
"url": "https://shop.example.com/products/widget",
"warnings": []
}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 |
|---|---|---|---|---|
| 1 h ago | Passed | 402 | 274 ms | $0.01 |
| 5 h ago | Passed | 402 | 530 ms | $0.01 |
| 8 h ago | Passed | 402 | 330 ms | $0.01 |
| 12 h ago | Passed | 402 | 329 ms | $0.01 |
| 16 h ago | Passed | 402 | 392 ms | $0.01 |
| 19 h ago | Passed | 402 | 323 ms | $0.01 |
| 24 h ago | Passed | 402 | 308 ms | $0.01 |
| 26 h ago | Passed | 402 | 270 ms | $0.01 |
| 30 h ago | Passed | 402 | 506 ms | $0.01 |
| 35 h ago | Passed | 402 | 392 ms | $0.01 |