# unprice Feed Page Match

> unprice Feed Page Match is a paid API for AI agents from volkov.evgeny.m2.fvds.ru, paid per call via x402, $0.025/call, status unknown (last checked 2026-09-14).

Checks whether a product's price, currency, and availability in a merchant feed match the signals found on the actual product page.

## Facts

- Endpoint: GET https://volkov.evgeny.m2.fvds.ru/pay/feed-page-match
- Price: $0.025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/unprice-feed-page-match-f62f1ae4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tiGx2H6Ahwc8iNCFXea1w

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 unprice-feed-page-match-f62f1ae4
```

Example prompt: Can you check whether the price in my product feed matches what's actually shown on this page — the feed says $19.99 USD in stock, and the URL is https://example.com/product?

## When to prefer this

Use this endpoint when you need to programmatically verify that a merchant product feed entry (price, currency, availability) matches the live product page — ideal for feed auditing pipelines, shopping ad compliance checks, or detecting data drift before campaign launches. Prefer over manual audits or generic scraping when you need a structured pass/fail verdict with named checks.

## Known failure modes

- URL is unreachable or returns non-200 status, causing check failure
- Page uses JavaScript rendering that prevents static price extraction, leading to inconclusive result
- Feed values omitted from query params result in incomplete validation
- Price format mismatch (e.g. comma vs period decimal) may cause false mismatch
- Rate limiting or payment failure returns 402 without executing the check

## How this service works

Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC receipts, and recent wallet statements.

## Output

A JSON object with the product URL, an array of named checks (e.g. feed_price_matches_page_signals) each with a pass/fail status, an overall verdict (match or mismatch), the expected price/currency/availability values, and any warnings.

## 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",
     "properties": {
      "url": {
       "type": "string"
      },
      "price": {
       "type": "string"
      },
      "currency": {
       "type": "string"
      },
      "availability": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com/product",
  "checks": [
   {
    "name": "feed_price_matches_page_signals",
    "status": "pass"
   }
  ],
  "verdict": "match",
  "expected": {
   "price": "19.99",
   "currency": "USD",
   "availability": "instock"
  },
  "warnings": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/unprice-feed-page-match-f62f1ae4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from volkov.evgeny.m2.fvds.ru](https://www.zero.xyz/host/volkov.evgeny.m2.fvds.ru/llms.txt)