# Hanzo Indexer — Hanzo AI

> Index and query on-chain data at scale.

Available Now

# Hanzo Indexer

Query blockchain data with GraphQL

Index and query on-chain data at scale. Deploy your own subgraphs and read the result through one GraphQL API.

### GraphQL API

Query indexed chain data through GraphQL.

### Custom Subgraphs

Deploy your own indexing logic with custom subgraph definitions.

### Real-Time Indexing

Data indexed within seconds of on-chain confirmation.

### Historical Aggregation

Pre-computed aggregations and time-series data for analytics.

[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

View Documentation

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.

### GraphQL API

Query indexed chain data through GraphQL.

### Custom Subgraphs

Deploy your own indexing logic with custom subgraph definitions.

### Real-Time Indexing

Data indexed within seconds of on-chain confirmation.

### Historical Aggregation

Pre-computed aggregations and time-series data for analytics.

### Cross-Chain Unification

Unified data model across multiple chains for easy cross-chain queries.

### Webhooks

Push notifications for indexed events to your backend.

### Token & Portfolio APIs

Pre-built APIs for token balances, transfers, and portfolio tracking.

### Analytics Dashboard

Monitor indexing status, query performance, and data freshness.

## Simple to Integrate

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

Solidity

Node

Python

Go

Rust

C

C++

Ruby

IndexedContract.sol

```
// SPDX-License-Identifier: MIT pragma solidity ^0.8.24; import "@hanzo/indexer/IHanzoIndexer.sol"; /// @title IndexedContract - Emit events optimized for Hanzo Indexer /// @notice Structured events for efficient GraphQL querying contract IndexedContract { // Indexed events for efficient GraphQL queries event Transfer( address indexed from, address indexed to, uint256 indexed tokenId, uint256 amount, uint256 timestamp ); event Swap( address indexed pair, address indexed sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out, uint256 indexed blockNumber ); event PriceUpdate( address indexed token, uint256 price, uint256 indexed timestamp ); // Log transfer for indexing function logTransfer( address from, address to, uint256 tokenId, uint256 amount ) external { emit Transfer(from, to, tokenId, amount, block.timestamp); } // Log swap for DEX indexing function logSwap( address pair, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out ) external { emit Swap( pair, msg.sender, amount0In, amount1In, amount0Out, amount1Out, block.number ); } // Log price for oracle indexing function logPriceUpdate(address token, uint256 price) external { emit PriceUpdate(token, price, block.timestamp); } }
```

## Built For

### DeFi Dashboards

Build trading dashboards with real-time price, volume, and liquidity data from DEXs.

### NFT Analytics

Track NFT sales, floor prices, holder distributions, and collection statistics.

### Token Explorers

Create token explorers with transfer history, holder analytics, and supply metrics.

### Protocol Monitoring

Monitor protocol health, TVL, user activity, and governance participation.

## Supported Chains

LuxEthereumPolygonArbitrumOptimismBaseAvalancheBNB Chain

## Start Building with Hanzo Indexer

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

Get Your API Key

[Explore All Web3 Products](https://hanzo.ai/blockchain)

## Open source

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

## Get Hanzo Indexer

Blockchain indexer

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