# Saylor Innovations NFT Metadata Lookup (ERC-721 / ERC-1155)

> Saylor Innovations NFT Metadata Lookup (ERC-721 / ERC-1155) is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-03).

Retrieves on-chain NFT metadata for a given Ethereum contract address and token ID, covering both ERC-721 and ERC-1155 standards.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/evm/ethereum/nft-metadata/:address/1?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-nft-metadata-lookup-erc-721-erc-1155-7c8bcd15
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LZrxpuNL98C9KDTa7Qi4l

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability saylor-innovations-nft-metadata-lookup-erc-721-erc-1155-7c8bcd15
```

Example prompt: Can you pull the on-chain NFT metadata for the Ethereum contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D, token ID 1? I want to see the attributes, image, and any other traits stored on-chain.

## When to prefer this

Choose this endpoint when you need on-chain NFT metadata from Ethereum mainnet for a known contract address and token ID, especially when you need ERC-721 or ERC-1155 support in a single endpoint. Prefer this over generic blockchain explorers when you want structured metadata output suitable for agent consumption at a low per-call cost.

## Known failure modes

- Invalid or non-existent contract address returns an error or empty response
- Token ID does not exist for the given contract, returning a not-found error
- Contract is not ERC-721 or ERC-1155 compliant, leading to failed metadata resolution
- Token URI points to off-chain storage (e.g. IPFS) that is unavailable, returning incomplete metadata
- Ethereum node latency or RPC errors causing timeouts
- Malformed contract address format returns a validation error

## How this service works

NFT Metadata (ERC-721 / ERC-1155) (ethereum). NFT metadata for ERC-721 and ERC-1155: tokenURI resolved (IPFS, Arweave, data: URIs) and the JSON fetched and parsed, with a direct image URL. Any of 5 chains.

## Output

Returns on-chain NFT metadata including the token name, token URI, image URL, description, and attribute/trait list as stored on the Ethereum blockchain for the specified contract address and token ID.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-nft-metadata-lookup-erc-721-erc-1155-7c8bcd15/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)