# NFT API — Hanzo AI

> Complete NFT data API for ERC-721 and ERC-1155 tokens.

Available Now

# NFT API

NFT metadata, ownership & marketplace data

Complete NFT data API for ERC-721 and ERC-1155 tokens. Get metadata, ownership history, floor prices, rarity scores, and collection stats across all major chains.

### Rich Metadata

Normalized metadata with images, traits, and attributes.

### Collection Discovery

Search and explore NFT collections by name or address.

### Ownership History

Track ownership changes, sales, and provenance.

### Floor & Sales Data

Real-time floor prices and recent sales from marketplaces.

[Back to Web3 Overview](https://hanzo.ai/blockchain)

## Get Your API Key

Start building in under 5 minutes

HA

Failover

<50ms

Latency

100+

Chains

Start Building Free

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No credit card required. Free tier includes 300M compute units/month.

Trusted by developers building:

DeFiNFTsPaymentsGamingAI Agents

## Key Capabilities

Everything you need, nothing you don&#x27;t.

### Rich Metadata

Normalized metadata with images, traits, and attributes.

### Collection Discovery

Search and explore NFT collections by name or address.

### Ownership History

Track ownership changes, sales, and provenance.

### Floor & Sales Data

Real-time floor prices and recent sales from marketplaces.

### Rarity Scoring

Automatic trait rarity calculation for collections.

### Multi-chain Support

ERC-721 and ERC-1155 across Ethereum, Polygon, and more.

### Spam Filtering

Automatic detection and filtering of spam NFTs.

### Fast Rendering

Optimized image proxying and thumbnail generation.

### Metadata Refresh

On-demand metadata refresh for dynamic NFTs.

## Simple to Integrate

Get started with just a few lines of code. SDKs for every language.

Solidity

Node

Python

Go

Rust

C

C++

Ruby

NFTMarketplace.sol

```
// SPDX-License-Identifier: MIT pragma solidity ^0.8.24; import "@hanzo/nft/IHanzoNFT.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; contract NFTMarketplace is ReentrancyGuard { IHanzoNFT public hanzoNFT; struct Listing { address seller; address nftContract; uint256 tokenId; uint256 price; bool is1155; uint256 amount; } mapping(bytes32 => Listing) public listings; event Listed(bytes32 indexed listingId, address seller, uint256 price); event Sold(bytes32 indexed listingId, address buyer, uint256 price); constructor(address _hanzoNFT) { hanzoNFT = IHanzoNFT(_hanzoNFT); } // List an ERC721 NFT function listERC721( address nftContract, uint256 tokenId, uint256 price ) external returns (bytes32 listingId) { IERC721(nftContract).transferFrom(msg.sender, address(this), tokenId); listingId = keccak256(abi.encode(nftContract, tokenId, block.timestamp)); listings[listingId] = Listing({ seller: msg.sender, nftContract: nftContract, tokenId: tokenId, price: price, is1155: false, amount: 1 }); emit Listed(listingId, msg.sender, price); } // Buy a listed NFT function buy(bytes32 listingId) external payable nonReentrant { Listing memory listing = listings[listingId]; require(listing.seller != address(0), "Not listed"); require(msg.value >= listing.price, "Insufficient payment"); delete listings[listingId]; // Transfer NFT to buyer if (listing.is1155) { IERC1155(listing.nftContract).safeTransferFrom( address(this), msg.sender, listing.tokenId, listing.amount, "" ); } else { IERC721(listing.nftContract).transferFrom( address(this), msg.sender, listing.tokenId ); } // Transfer payment to seller payable(listing.seller).transfer(listing.price); emit Sold(listingId, msg.sender, listing.price); } }
```

## Built For

### NFT Marketplaces

Build trading platforms with rich collection and item data.

### Wallet Integration

Display NFT collections with images and metadata.

### Gaming Platforms

Track in-game assets and player inventories.

### Analytics Tools

Collection analytics, whale tracking, and market trends.

## Supported Chains

EthereumPolygonArbitrumOptimismBaseBNB ChainAvalancheSolanaLux

## Start Building with NFT API

Get your free API key and ship your first request in under 5 minutes. No credit card required.

Get Your API Key

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## Open source

License: Apache-2.0[luxfi](https://github.com/luxfi)

## Get NFT API

NFT marketplace

[Deploy to Cloud](https://console.hanzo.ai/deploy)