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Polygon PoS NFT Onchain Data
x402
Polygon PoS NFT Onchain Data is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-29).
Fetches metadata for an ERC-721 or ERC-1155 token on Polygon PoS, including collection name, current owner, token URI, decoded metadata JSON, and a browser-loadable image URL.
Price / call$0.008
Success—
StatusUnknown
How this service works
Metadata for an ERC-721 or ERC-1155 token on Polygon PoS: collection name, current owner (ERC-721), token URI, and the metadata JSON fetched and decoded from IPFS, Arweave, HTTPS or an inline data URI, with a browser-loadable image URL.
Output
Returns a JSON object with: chain identifier ('polygon'), contract address, token ID, NFT standard (ERC-721 or ERC-1155), collection name, current owner address (ERC-721), token URI, fetchedFrom source (IPFS/Arweave/HTTPS/inline data URI), a browser-loadable imageUrl, and the full decoded metadata object including name, description, image, and attributes array.
Example use cases
Verify NFT ownership before gating access
“Check who currently owns token ID 42 on the Polygon contract 0xDb46d1Dc155634FbC732f92E853b10B288AD5a1d — I need to confirm ownership before granting this user access to my platform.”
Display NFT gallery card with traits
“Pull the full metadata and image for token ID 1337 at Polygon contract 0x2953399124F0cBB46d2CbACD8A89cF0599974963 so I can render it in my NFT gallery, including its trait attributes.”
Audit Lens Protocol Profile NFT details
“Fetch the on-chain info for Lens Protocol Profile token ID 100 on Polygon — I want the collection name, token URI, decoded metadata, and the background trait to add to my spreadsheet.”
Technical details
Endpoint
GEThttps://onchaincheck.dev/polygon/nft?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need comprehensive NFT metadata for a specific token on Polygon PoS, including decoded metadata from IPFS, Arweave, HTTPS, or inline data URIs, along with a ready-to-display image URL. Prefer this over generic blockchain RPCs when you need the metadata JSON resolved and decoded automatically without handling IPFS gateways yourself. Best for ERC-721 or ERC-1155 tokens specifically on the Polygon PoS network.
Side effects
- Invalid contract address format returns a validation error
- Non-existent token ID returns an error or empty response
- IPFS/Arweave metadata unreachable causes fetch failure
- Token on a different chain than Polygon PoS will not be found
- Malformed or non-standard token URI may result in incomplete metadata
- Rate limiting or payment failure (402) if USDC payment not provided
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "polygon",
"owner": "0x7241DDDec3A6aF367882eAF9651b87E1C7549Dff",
"tokenId": "5",
"contract": "0xDb46d1Dc155634FbC732f92E853b10B288AD5a1d",
"imageUrl": "data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNzUiIGhlaWdodD0iMjc1IiBmaWxsPSJub25lIj48Zz48cGF0aCBmaWxsPSJ1cmwoI3llbGxvdykiIGQ9Ik0wIDBoMjc1djQxNUgweiIvPjwvZz… (240 chars, truncated in this example)",
"metadata": {
"name": "Profile #5",
"image": "data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNzUiIGhlaWdodD0iMjc1IiBmaWxsPSJub25lIj48Zz48cGF0aCBmaWxsPSJ1cmwoI3llbGxvdykiIGQ9Ik0wIDBoMjc1djQxNUgweiIvPjwvZz… (240 chars, truncated in this example)",
"attributes": [
{
"value": "5",
"trait_type": "ID",
"display_type": "number"
},
{
"value": "0x05",
"trait_type": "HEX ID"
},
{
"value": "1",
"trait_type": "DIGITS"
},
{
"value": "1652809016",
"trait_type": "MINTED AT",
"display_type": "date"
},
{
"value": "gold",
"trait_type": "Background"
}
],
"description": "Lens Protocol - Profile #5"
},
"standard": "ERC-721",
"tokenUri": "data:application/json;base64,eyJuYW1lIjo…",
"collection": "Lens Protocol Profiles",
"fetchedFrom": "inline data URI"
}
}Tags
x402
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