# Hanzo Safe — Hanzo AI

> Multi-signature custody with quantum-safe security

Available Now

# Hanzo Safe

Multi-signature custody with quantum-safe security

Enterprise-grade multi-sig and threshold-signature wallets built on quantum-resistant cryptography. Secure your treasury with customizable policies, recovery mechanisms, and comprehensive audit trails.

### Multi-Sig Wallets

Require multiple signatures for transactions. 2-of-3, 3-of-5, or custom configurations.

### Threshold Signatures

TSS-based signing that never reconstructs the full private key.

### Quantum-Safe Custody

Post-quantum cryptographic algorithms protect against future threats.

### Policy Engine

Define spending limits, time locks, and approval workflows.

[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.

### Multi-Sig Wallets

Require multiple signatures for transactions. 2-of-3, 3-of-5, or custom configurations.

### Threshold Signatures

TSS-based signing that never reconstructs the full private key.

### Quantum-Safe Custody

Post-quantum cryptographic algorithms protect against future threats.

### Policy Engine

Define spending limits, time locks, and approval workflows.

### Audit Trail

Complete history of all actions, approvals, and transactions.

### Notifications

Real-time alerts for pending approvals, transactions, and policy changes.

### Hardware Key Support

Integrate Ledger, Trezor, and other hardware wallets as signers.

### Recovery Mechanisms

Social recovery, time-delayed recovery, and emergency contacts.

## Simple to Integrate

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

Solidity

Node

Python

Go

Rust

C

C++

Ruby

TreasurySafe.sol

```
// SPDX-License-Identifier: MIT pragma solidity ^0.8.24; import "@hanzo/safe/IHanzoSafe.sol"; import "@hanzo/safe/ISafeModule.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; contract TreasuryModule is ISafeModule { IHanzoSafe public safe; uint256 public dailyLimit; uint256 public spentToday; uint256 public lastSpendDate; mapping(address => bool) public allowedRecipients; constructor(address _safe, uint256 _dailyLimit) { safe = IHanzoSafe(_safe); dailyLimit = _dailyLimit; } // Execute transaction through Safe with daily limit check function executeWithLimit( address to, uint256 value, bytes calldata data ) external returns (bool success) { require(allowedRecipients[to], "Recipient not allowed"); // Reset daily limit if new day if (block.timestamp / 1 days > lastSpendDate) { spentToday = 0; lastSpendDate = block.timestamp / 1 days; } require(spentToday + value = safe.threshold(), "Threshold not met"); safe.executeTransaction(proposalId); } }
```

## Built For

### DAO Treasury

Manage community funds with multi-sig governance. Require council approval for large transactions.

### Corporate Treasury

Secure company crypto assets with board-level approval workflows and audit compliance.

### Investment Funds

Manage fund assets with partner signatures, compliance checks, and institutional-grade security.

### Protocol Governance

Secure protocol admin keys with time locks, multi-sig, and emergency pause capabilities.

## Supported Chains

Lux

Ethereum

Polygon

Arbitrum

Optimism

Avalanche

BNB Chain

## Start Building with Hanzo Safe

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)

## Get Hanzo Safe

Deploy in seconds or self-host with the open-source release.

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