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Collectible Arbitrage Scanner (eBay)
x402
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
Price / call$0.002
Success—
StatusUnknown
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.
Example use cases
Flip vintage Star Wars figures
“Can you check eBay for any arbitrage opportunities on vintage Star Wars action figures? I want to know if there are underpriced listings I could buy and resell for a profit.”
Find mispriced sports card deals
“Scan eBay for buy-low sell-high opportunities on 1986 Fleer Michael Jordan rookie cards — are there any listings priced significantly below what others are selling for?”
Spot undervalued Pokemon card listings
“I'm looking to flip some Pokemon cards — can you scan eBay for price discrepancies on holographic first-edition Blastoise and tell me if there's a real arbitrage opportunity right now?”
Technical details
Endpoint
GEThttps://apiwitchcraft.duckdns.org/collect-arbWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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