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NFT Rarity Score (Per-Token Trait Rarity)
x402
NFT Rarity Score (Per-Token Trait Rarity) is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Returns per-token trait rarity scores using alchemy_computeRarity and derives the rarest trait for a given NFT, with results cached up to 24 hours.
Price / call$0.005
Success—
StatusUnknown
How this service works
Per-token trait rarity (alchemy_computeRarity) + derived rarest trait — cached ≤24h
Output
Returns per-trait rarity scores for every attribute on the specified NFT token (computed via alchemy_computeRarity), plus a derived field identifying the single rarest trait. Results are served from cache if computed within the last 24 hours.
Example use cases
Rarity check before NFT purchase
“I'm thinking about buying token #7832 from the Azuki collection at contract 0xED5AF388653567Af2F388E6224dC7C4b3241C544 — can you tell me how rare it is and which single trait is making it stand out from the rest of the collection?”
Compare rarity of owned NFTs
“I own token #112 and token #889 from the Doodles contract 0x8a90CAb2b38dba80c64b7734e58Ee1dB38B8992e on Ethereum — which one is rarer overall, and what's the rarest trait on each?”
Spot undervalued rare NFT listings
“There's a listing for token #2201 from the Clone X collection at 0x49cF6f5d44E70224e2E23fDcdd2C053F30aDA28B — is it actually rare or just overpriced, and which trait is driving its rarity score?”
Technical details
Endpoint
GEThttps://x402.professorsausages.com/nft/:chain/asset/:address/:tokenId/rarityWhen to prefer
Use this endpoint when you need per-token trait-level rarity scores for a specific NFT and want the rarest trait surfaced automatically. Prefer this over generic NFT metadata APIs when rarity ranking is the primary concern and you want Alchemy-backed computation without managing your own rarity calculations.
Side effects
- Invalid or unsupported chain identifier returns an error
- Contract address not found or not an NFT contract returns empty or error
- Token ID does not exist within the contract returns 404 or empty response
- Alchemy upstream unavailable causes computation failure
- Cache miss on a newly minted token may cause slightly higher latency
Tags
x402
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