# QuantaFlow - Rapid eBay Average Selling Price

> QuantaFlow - Rapid eBay Average Selling Price is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Retrieves the average selling price of items on eBay via a pay-per-call x402 gateway for $0.01 USDC per request

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-ebay-average-selling-price?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/quantaflow-rapid-ebay-average-selling-price-ce0a6bec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K91wv34out5dsovlQaYu1

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-rapid-ebay-average-selling-price-ce0a6bec -d '<json body>'
```

Example prompt: What's the average selling price for a Nintendo Switch on eBay right now? I want to know what they're actually going for in sold listings.

## When to prefer this

Choose this endpoint when you need quick, pay-per-call eBay average sold price data without a subscription, especially in agentic workflows where micro-payments via x402/USDC are already supported and per-request billing at $0.01 is preferable to managing API keys or monthly plans.

## Known failure modes

- Payment failure if USDC balance is insufficient or x402 payment header is malformed
- Upstream API timeout or rate limiting from the RapidAPI eBay data source
- No results found if search query is too niche or misspelled
- Invalid query parameters resulting in upstream 400 error
- Upstream eBay data unavailability causing 502/503 passthrough

## How this service works

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

## Output

Returns eBay average selling price data for a queried product, typically including average sold price figures derived from recent eBay sold listings, passed through from the upstream RapidAPI eBay data source.

## 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-rapid-ebay-average-selling-price-ce0a6bec/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)