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Phantom API — Polygon NFT Metadata Lookup
x402
Phantom API — Polygon NFT Metadata Lookup is a paid API for AI agents from phantom-api-omega.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Fetches on-chain NFT metadata for a given contract address and token ID on the Polygon network
Price / call$0.01
Success—
StatusUnknown
How this service works
Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.
Output
Returns on-chain NFT metadata for the specified Polygon token, typically including the token name, description, image URI, external URL, and an array of trait/attribute key-value pairs as defined by the NFT contract's metadata standard (ERC-721/ERC-1155).
Example use cases
NFT trait lookup for rarity scoring
“I need the on-chain metadata and attributes for token ID 5678 from the Polygon contract 0x1234abcd... — I want to check its traits so I can calculate its rarity score.”
Display NFT details in a gallery app
“Fetch the metadata for Polygon NFT token 99 at contract 0xdeadbeef... so I can show its image, name, and description in my gallery.”
Verify NFT ownership details before a sale
“Before I list it for sale, can you grab the full metadata for token ID 42 on the Polygon contract 0xabc123...? I want to confirm the name, image, and attributes are correct.”
Technical details
Endpoint
POSThttps://phantom-api-omega.vercel.app/api/polygon/nft/metadataWhen to prefer
Choose this endpoint when you specifically need NFT metadata from the Polygon (MATIC) network and want a pay-per-call model without committing to a subscription. It is ideal for agents that need fast, on-demand lookups of individual NFT tokens by contract address and token ID, especially when building workflows that check traits, display collectibles, or verify metadata before a transaction.
Side effects
- Invalid or non-existent contract address returns an error or empty response
- Token ID not found on the contract returns a 404 or null metadata
- Contract does not implement standard metadata URI function — returns an error
- Polygon RPC node unavailable — returns a timeout or 503
- Malformed input (non-hex contract address, non-numeric token ID) returns a 400 validation error
- IPFS or off-chain metadata URI unreachable — may return partial or no metadata
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tokenId | string | |
| contractAddress | string |
Tags
x402
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