# Collectible Arbitrage Scanner (eBay)

> Collectible Arbitrage Scanner (eBay) is a paid API for AI agents from apiwitchcraft.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Scans eBay to identify arbitrage opportunities for collectible items by comparing prices across listings

## Facts

- Endpoint: GET https://apiwitchcraft.duckdns.org/collect-arb
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/collectible-arbitrage-scanner-ebay-7388184c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GP0Ybe_nSs7wlb9j99l2i

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 collectible-arbitrage-scanner-ebay-7388184c
```

Example prompt: Can you scan eBay for arbitrage opportunities on first-edition Charizard Pokemon cards and tell me where I can buy low and flip for profit?

## When to prefer this

Use this endpoint when you need real-time eBay-specific arbitrage signals for a named collectible item. Prefer it over generic price-lookup APIs when the goal is identifying buy-low/sell-high opportunities rather than just current market price. Best suited for collectibles (cards, toys, memorabilia) where eBay is the dominant resale marketplace.

## Known failure modes

- Item not found on eBay — returns empty or null results
- Invalid or overly generic item query yields noisy or irrelevant listings
- eBay rate limiting or downtime causes upstream failure
- Market parameter not recognized returns default or error
- Insufficient listing volume for meaningful arbitrage signal

## How this service works

Cross-exchange + cross-DEX arbitrage scanner for crypto tokens AND physical collectibles. For crypto: resolves a coin (e.g. BTC/ETH/USDC), compares DEX Screener prices across Base/Arbitrum/Ethereum/Optimism DEXes against CoinGecko CEX spot, computes net-of-gas spread signals (dex-vs-dex, dex-vs-cex, triangular). For collectibles: eBay Browse API listings (PROD eBay key required). x402 pay-per-call on Base USDC.

## Output

Returns price comparison data and arbitrage opportunities for the specified collectible on eBay, including price spreads between listings that indicate potential buy-low-sell-high opportunities across the market.

## 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": [
      "item"
     ],
     "properties": {
      "item": {
       "type": "string"
      },
      "market": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/collectible-arbitrage-scanner-ebay-7388184c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apiwitchcraft.duckdns.org](https://www.zero.xyz/host/apiwitchcraft.duckdns.org/llms.txt)