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OP Mainnet NFT Metadata Lookup
x402
OP Mainnet NFT Metadata Lookup is a paid API for AI agents from ca-tax-api-mainnet.lxtap.workers.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-23).
Fetches on-chain and off-chain metadata for an ERC-721 or ERC-1155 NFT on OP Mainnet, including collection name, owner, token URI, decoded metadata JSON, and a browser-loadable image URL.
Price / call$0.008
Success—
StatusUnknown
How this service works
Pay-per-call data for AI agents, paid in USDC on Base with x402: token risk checks (rug check) on Base, Ethereum, Arbitrum, Optimism, Polygon and Solana, onchain reads (balances, transactions, gas, contracts, NFTs, whale trades, new pools, ENS and Basenames), ECB exchange rates, and Canadian sales tax and business days.
Output
Returns the collection name, current owner address (for ERC-721), token URI, decoded metadata JSON (resolved from IPFS, Arweave, HTTPS, or inline data URI), and a browser-loadable image URL for the specified NFT on OP Mainnet.
Example use cases
NFT ownership verification on Optimism
“Who currently owns token ID 77 from the NFT contract 0x4200000000000000000000000000000000000042 on OP Mainnet? I need to verify ownership before we process a transfer.”
Display NFT artwork in a gallery app
“Fetch the image URL and metadata for token ID 500 from the Optimism NFT collection at contract 0x4200000000000000000000000000000000000042 so I can display it in the gallery.”
Audit NFT collection traits and attributes
“Get the full decoded metadata JSON for token ID 999 on the OP Mainnet contract 0x4200000000000000000000000000000000000042 — I want to see all the traits and attributes stored in the token.”
Technical details
Endpoint
GEThttps://ca-tax-api-mainnet.lxtap.workers.dev/optimism/nft?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need comprehensive NFT metadata for a specific token on OP Mainnet (Optimism), including off-chain metadata resolution from IPFS, Arweave, or HTTPS sources. Prefer this over generic blockchain RPCs when you need the full decoded metadata JSON and a ready-to-use image URL without writing your own URI resolution logic. Choose the Ethereum sibling endpoint for Ethereum mainnet NFTs.
Side effects
- Invalid contract address format returns a validation error
- Token ID does not exist on the contract returns not-found error
- IPFS or Arweave metadata gateway timeout causes incomplete metadata response
- Contract is not an ERC-721 or ERC-1155 token returns an error
- Network or RPC unavailability for OP Mainnet causes fetch failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "optimism",
"owner": "0xc2EEdF3bC7F93366c00c6074DF0e6F122fa2445c",
"tokenId": "1043",
"contract": "0x4857DB576eE0e45F10525eC59527BfD10beeC60b",
"imageUrl": "data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAwIiBoZWlnaHQ9IjQwMCIgdmlld0JveD0iMCAwIDQwMCA0MDAiIGZpbGw9Im5vbmUiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgeG1sbnM6eGxpbms9Imh0dHA6Ly93d3cudzMub3JnLz… (240 chars, truncated in this example)",
"metadata": {
"name": "CL - USDC/ETH - 2397.1<>2421.2",
"image": "data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAwIiBoZWlnaHQ9IjQwMCIgdmlld0JveD0iMCAwIDQwMCA0MDAiIGZpbGw9Im5vbmUiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgeG1sbnM6eGxpbms9Imh0dHA6Ly93d3cudzMub3JnLz… (240 chars, truncated in this example)",
"description": "This NFT represents a liquidity position in a Velodrome Finance USDC-ETH pool. The owner of this NFT can modify or redeem the position.\n\nPool Address: 0xca231d91ec00385a54e541f504617d2197f9b7c3\nUSDC A… (240 chars, truncated in this example)"
},
"standard": "ERC-721",
"tokenUri": "data:application/json;base64,eyJuYW1lIjo…",
"collection": "Slipstream V3 Deposit",
"fetchedFrom": "inline data URI"
}
}Tags
x402
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