# Radar Cheapest Price Finder

> Radar Cheapest Price Finder is a paid API for AI agents from 2-29-135-242.sslip.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).

Searches multiple online stores for a product and returns offers sorted from cheapest to most expensive, optionally converting prices to a specified currency.

## Facts

- Endpoint: POST https://2-29-135-242.sslip.io/x402/cheapest-price-finder?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/radar-cheapest-price-finder-02956e0c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_al19JC4ZOPUkPnlCDHz4k

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 radar-cheapest-price-finder-02956e0c -d '<json body>'
```

Example prompt: Search Amazon, Walmart, Best Buy, and Newegg for the cheapest in-stock deals on a 'Sony WH-1000XM5' headphones — show me up to 20 offers sorted from cheapest to most expensive, with prices in USD.

## When to prefer this

Choose this endpoint when you need to compare real-time prices across multiple e-commerce retailers for a specific product, either by search query or by supplying direct product URLs. It is particularly useful when you want prices normalized to a single currency and sorted by cost. Prefer it over manual web searches when you need structured, machine-readable price data from major retailers like Amazon, Walmart, Best Buy, Target, eBay, and Newegg in a single API call.

## Known failure modes

- No results found if product is not available in specified stores
- Out-of-stock items filtered out if onlyInStock is true, potentially returning empty results
- Invalid store domains may be silently ignored or return zero results
- Currency conversion failures if an unsupported currency code is provided
- Rate limits or scraping blocks from individual retailers may reduce result count
- Payment failure via x402 if insufficient USDC balance on Base

## How this service works

Fast tools (web read, domain RDAP/DNS/SSL, Federal Register, clinical trials, Polymarket+Kalshi odds, OSV vulnerabilities) and data APIs (leads, jobs, YouTube, Reddit, Trends, tenders...). POST JSON, pay per call in USDC on Base via x402. Charged only when results are returned.

## Output

A JSON object with a count and an array of offer items, each containing the product URL, store name, price, and optionally the price converted to the requested currency, sorted from cheapest to most expensive. Only results that matched and had retrievable prices are included.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "stores": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "description": "Store domains for the search, e.g. bestbuy.com, newegg.com, ebay.com. Empty = amazon.com, walmart.com, bestbuy.com, target.com, ebay.com, newegg.com."
  },
  "maxItems": {
   "type": "integer",
   "default": 20,
   "example": 20,
   "maximum": 100,
   "minimum": 1,
   "description": "Hard limit on saved offers (and cost)."
  },
  "convertTo": {
   "type": "string",
   "example": "USD",
   "description": "All prices are also converted to this currency with official ECB rates (USD, EUR, GBP, ...)."
  },
  "onlyInStock": {
   "type": "boolean",
   "example": false,
   "description": "Skip offers marked out of stock."
  },
  "productUrls": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "example": [
    "https://www.allbirds.com/products/mens-tree-runners",
    "https://www.allbirds.com/products/womens-tree-runners",
    "https://www.allbirds.com/products/mens-wool-runners"
   ],
   "description": "Product pages from any online stores. The actor reads the real price from each page and sorts all offers from cheapest to most expensive."
  },
  "searchQuery": {
   "type": "string",
   "description": "Product name or model, e.g. 'Sony WH-1000XM5'. Product pages are searched in the stores below."
  },
  "resultsPerStore": {
   "type": "integer",
   "example": 3,
   "description": "How many search results to check in each store."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 1,
  "items": [
   {
    "...": "one result object"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/radar-cheapest-price-finder-02956e0c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 2-29-135-242.sslip.io](https://www.zero.xyz/host/2-29-135-242.sslip.io/llms.txt)