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NFT Wash-Trade Check
x402
NFT Wash-Trade Check is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Analyzes a specific NFT token's sales history for wash-trading patterns, returning a verdict and supporting evidence
Price / call$0.01
Success—
StatusUnknown
How this service works
Per-token wash-trade heuristics: verdict + evidence over that token's sales — cached ≤24h
Output
Returns a wash-trade verdict (e.g. clean, suspicious, flagged) along with evidence derived from the token's sales history, such as circular trading patterns, repeated buyer-seller pairs, and price anomalies. Results are cached for up to 24 hours.
Example use cases
Pre-purchase NFT due diligence
“I'm thinking about buying token #187 from the contract 0xb47e3cd837dDF8e4c57F05d70Ab865de6e193BBB on Ethereum. Can you check if its sales history looks clean or if there are any signs of wash trading before I spend real money on it?”
Investigate suspicious price spike
“Token #902 from contract 0x60E4d786628Fea6478F785A6d7e704777c86a7c6 had a massive price jump last week that seems off. Can you analyze its trading history and tell me if it looks like artificial price inflation or wash trading?”
Flag manipulated NFT for report
“I'm putting together a report on NFT market manipulation and I need to know if token #3341 from contract 0x34d85c9CDeB23FA97cb08333b511ac86E1C4E258 has been flagged for fake sales or circular trading patterns. Can you run a wash-trade check on it?”
Technical details
Endpoint
GEThttps://x402.professorsausages.com/nft/:chain/asset/:address/:tokenId/wash-checkWhen to prefer
Use this endpoint when you need per-token wash-trade analysis for a specific NFT, rather than collection-level statistics. Ideal for due diligence before purchasing an NFT, investigating suspicious price history, or flagging market manipulation on a particular asset. The 24h cache makes it efficient for repeated lookups on the same token.
Side effects
- Invalid or unsupported chain identifier returns an error
- Contract address not found or not an NFT contract
- Token ID does not exist on the given contract
- No sales history available for the token — verdict may be inconclusive
- Payment not received or insufficient — 402 response
- Cache miss on first call may increase latency slightly
Tags
x402
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