# QuantaFlow eBay Product SERP Search

> QuantaFlow eBay Product SERP Search is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Searches eBay product listings via a SERP-style query and returns structured product results, paid per-call using the x402 micropayment protocol.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/serp-ebay-product
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-ebay-product-serp-search-a4e7a597
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9LDXvlxLg0dS8aLOdOZ0F

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 quantaflow-ebay-product-serp-search-a4e7a597 -d '<json body>'
```

Example prompt: Search eBay for 'Sony WH-1000XM5 headphones' and show me the top listings with prices and seller details.

## When to prefer this

Use this endpoint when you need programmatic access to eBay product search results with per-call micropayment billing via x402 and no subscription required. Ideal for agents that need occasional or bursty eBay search queries without a full API key setup, or for web3-native workflows that prefer on-chain micropayments.

## Known failure modes

- Payment failure due to insufficient USDC balance or x402 protocol error
- Upstream eBay SERP service unavailable or rate-limited
- Invalid or missing query parameters resulting in empty results
- Malformed JSON body causing request parsing errors
- No results found for the given search query
- Gateway timeout if the upstream search provider is slow

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

Returns a pass-through of the upstream eBay SERP response, typically including a list of product listings with titles, prices, URLs, seller names, shipping info, and other metadata available from eBay search results.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "body": {
   "type": "string",
   "description": "Optional JSON body forwarded to POST requests."
  },
  "path": {
   "type": "string",
   "description": "Path below the selected upstream origin."
  },
  "query": {
   "type": "object"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "description": "The upstream response body and content type are passed through after successful payment."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quantaflow-ebay-product-serp-search-a4e7a597/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quanta-roan.vercel.app](https://www.zero.xyz/host/quanta-roan.vercel.app/llms.txt)