y0.exchange Documentation

y0.exchange is an AI-to-Blockchain infrastructure platform. We provide an MCP server, signing service, and wallet abstraction layer that lets AI agents interact with EVM blockchains — while users keep full control of their private keys.

What is y0?

Think of y0 as the Plaid/Stripe for AI-to-Blockchain. Instead of building custom blockchain integrations for your AI agent, you install our MCP server and get instant access to:

• Read tools — balances, portfolio, prices, quotes, gas estimates, transaction history
• Write tools — swap, send, bridge, approve (all non-custodial)
• Signing service — transaction builder + approval queue with WebSocket notifications
• Wallet abstraction — Privy, Reown, MetaMask, WalletConnect support

Core Principles

1. Non-custodial — y0 NEVER holds, stores, or accesses private keys. All signing happens on the user’s device.
2. Open Core — MCP server, SDKs, and signing UI are MIT-licensed. Backend services are proprietary SaaS.
3. Zero user fees — No fees for end users. Revenue from B2B subscriptions and affiliate kickbacks.

Quick Links

• Quick Start — Install and run in 5 minutes
• MCP Tools Reference — All 10 tools with parameters and examples
• Architecture — How the signing flow works
• Pricing — Free, Pro, Business, Enterprise tiers

Supported Chains