OWS - Open Wallet Standard

Perform multi-chain wallet management, balance checks, transaction signing, x402 payments, funding, and policy control with encrypted local key storage using...

Local-first, multi-chain wallet management for AI agents. By MoonPay.

• Website: https://openwallet.sh
• GitHub: https://github.com/open-wallet-standard/core
• npm: https://www.npmjs.com/package/@open-wallet-standard/core

Prerequisites

OWS CLI (ows) must be pre-installed by the user. This skill does not install software. See https://openwallet.sh for installation instructions.

When to Use

• Checking wallet balances
• Signing transactions or messages
• Making x402 payments to paid APIs
• Querying wallet info

CLI Reference

bash

# Wallet info
ows wallet list                    # List all wallets
ows wallet info                    # Show vault path + supported chains

# Balances
ows fund balance --wallet <name> --chain <chain>   # Check balance (base, ethereum, solana, etc.)

# Signing
ows sign message --wallet <name> --chain <chain> --message <msg>
ows sign tx --wallet <name> --chain <chain> --tx <hex>

# x402 payments
ows pay request --wallet <name> <url>       # Pay an x402-enabled API
ows pay discover <url>                       # Discover x402 services

Node.js SDK

typescript

import { signMessage } from "@open-wallet-standard/core";

const sig = signMessage("my-wallet", "evm", "hello");

Supported Chains

EVM (Ethereum, Base, Polygon, Arbitrum), Solana, Bitcoin, Cosmos, Tron, TON, Sui, Filecoin, Spark. All derived from a single BIP-39 seed via CAIP-2 chain identifiers.

Security Model

• Keys encrypted at rest (AES-256-GCM)
• Keys decrypted only during signing, wiped from memory immediately after
• Pre-signing policy engine for spending limits and chain allowlists
• The OWS API never returns raw private keys
• Append-only audit log

Important

• Never ask for or handle raw private keys. OWS signs internally.
• Do not install or update OWS packages. Only use pre-installed CLI.
• See https://openwallet.sh for full documentation.