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Ethereum NFT Metadata Resolver
x402
Ethereum NFT Metadata Resolver is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-21).
Fetches and parses on-chain ERC-721 or ERC-1155 token metadata (name, image, attributes, etc.) for a given Ethereum contract address and token ID, resolving only from IPFS, Arweave, or data URIs.
Price / call$0.005
Success—
StatusUnknown
How this service works
Call when an agent needs parsed ERC-721 or ERC-1155 metadata for an Ethereum contract and token id. The URI is fetched only from fixed IPFS and Arweave gateways, or parsed from a data JSON URI. ERC-1155 substitutes {id}. No arbitrary URL. Send JSON {"contract":"0x1111111111111111111111111111111111111111","token_id":"1"}. Exact $0.005 USDC on Base. Try unpaid POST /v1/sandbox/eth-nft-metadata first.
Output
A parsed JSON object containing the NFT token's metadata fields such as name, description, image URL, animation URL, external URL, and an array of attributes/traits, resolved from IPFS, Arweave, or an inline data URI.
Example use cases
NFT trait lookup for rarity analysis
“Pull the metadata for token ID 4269 on the ERC-721 contract at 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D — I need to see all the attributes and traits listed for it.”
ERC-1155 game item metadata retrieval
“Fetch the metadata for token ID 37 on the ERC-1155 contract at 0x76BE3b62873462d2142405439777e971754E8E4 so I can see the item name, description, and image.”
NFT portfolio display enrichment
“I have a list of NFTs in a wallet and need to display them nicely — can you get the metadata for token ID 12 on contract 0xb47e3cd837dDF8e4c57F05d70Ab865de6e193BBB using the ERC-721 standard so I can show the image and name?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/eth-nft-metadata?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to resolve and parse NFT token metadata from Ethereum mainnet for ERC-721 or ERC-1155 tokens, especially when the metadata is stored on IPFS or Arweave. It is preferable to calling the blockchain and IPFS yourself because it handles {id} substitution for ERC-1155, gateway resolution, and JSON parsing in one step. Best for agents that need structured NFT metadata (name, image, attributes) without managing raw RPC calls or IPFS gateway logic.
Side effects
- Invalid or non-existent contract address returns an error
- Token ID does not exist on the contract returns an error
- Token URI points to an unsupported gateway (not IPFS or Arweave) returns an error
- Malformed or unparseable metadata JSON at the resolved URI returns an error
- Missing or incorrect token standard causes wrong ABI call and an error
- Unpaid or underpaid request returns a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| contract | string | NFT contract on Ethereum mainnet. Example: 0x1111111111111111111111111111111111111111. tokenURI or uri is read-only. |
| standard | string | Token standard. erc721 (default) uses ownerOf or tokenURI. erc1155 uses balanceOf(owner, id) or uri(id) with {id} substitution. |
| token_id | string | Token id as a decimal integer. Example: 1. ERC-1155 substitutes this id into {id} in the URI. A missing token errors. |
Tags
x402
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