# offercheck /v1/verify/offer

> offercheck /v1/verify/offer is a paid API for AI agents from offercheck.offercheck.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Fetches a public product page URL and extracts live price, currency, and availability using structured data (JSON-LD, microdata, etc.) with a confidence score

## Facts

- Endpoint: GET https://offercheck.offercheck.workers.dev/v1/verify/offer?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/offercheck-v1-verify-offer-79263463
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PvoSt60UlUUaI2uetNf67

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability offercheck-v1-verify-offer-79263463
```

Example prompt: Can you check whether this product is still in stock and what its current price is? The URL is https://shop.example.com/products/widget — I want the live price, currency, and availability, plus how confident you are in the result.

## When to prefer this

Use this endpoint when you need to verify a specific product's live price and availability at a known URL, especially when you want structured evidence of the extraction method and a confidence score. Prefer it over generic web scrapers when you need normalized offer data (price, currency, availability) rather than raw HTML, and when you want pay-per-call pricing with no signup. It is best suited for single-product spot checks rather than bulk catalog crawls.

## Known failure modes

- Product page returns non-200 HTTP status — http_status field will reflect the error code and confidence will be low or zero
- No structured data (JSON-LD, microdata) found on the page — returns low confidence score with empty or partial offer fields
- URL redirects to a login wall or geo-blocked page — final_url will differ and offer data may be absent
- Page is dynamically rendered (JavaScript-only) and price is not in the HTML source — extraction may fail or return stale cached data
- Invalid or malformed URL input — returns validation error
- Page is rate-limiting or blocking the crawler — may return HTTP 429 or incomplete data

## How this service works

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.

## Output

A JSON object containing: the live price and currency extracted from the product page, availability status (e.g. in_stock), product metadata (name, SKU, brand), an evidence object showing the extraction method (e.g. JSON-LD), a raw snippet of the structured data found, the SHA-256 of the page content, the fetch timestamp, HTTP status, final URL after redirects, a confidence score (0–1), response time in milliseconds, and any warnings encountered.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri",
       "description": "Public product page URL (http/https)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ms": 812,
  "url": "https://shop.example.com/products/widget",
  "offer": {
   "price": 19.99,
   "currency": "USD",
   "availability": "in_stock"
  },
  "product": {
   "sku": "W-100",
   "name": "Example Widget",
   "brand": "Example"
  },
  "evidence": {
   "bytes": 84210,
   "method": "json-ld",
   "snippet": "{\"@type\":\"Product\",\"offers\":{\"price\":\"19.99\",\"priceCurrency\":\"USD\",\"availability\":\"https://schema.org/InStock\"}}",
   "fetched_at": "2026-09-25T20:00:00.000Z",
   "content_type": "text/html; charset=utf-8",
   "content_sha256": "…"
  },
  "warnings": [],
  "final_url": "https://shop.example.com/products/widget",
  "confidence": 0.9,
  "http_status": 200
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/offercheck-v1-verify-offer-79263463/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from offercheck.offercheck.workers.dev](https://www.zero.xyz/host/offercheck.offercheck.workers.dev/llms.txt)