AI + Blockchain

Your AI agent. On-chain.

y0 gives any MCP-compatible AI agent the ability to read balances, swap tokens, bridge across chains, and send transactions — non-custodially. You keep full control of signing.

Read the Docs Developer Guide

What is MCP?

Model Context Protocol (MCP) is the open standard created by Anthropic that lets AI models call external tools. Instead of just chatting, MCP-enabled AI agents can take actions — read data, call APIs, and interact with the real world. y0 implements an MCP server with 10 crypto tools — 6 read-only (balances, prices, gas, portfolio, quotes, history) and 4 write (swap, send, bridge, approve). When your AI agent uses a write tool, y0 builds an unsigned transaction and sends it to you for review. You approve in your own wallet. The AI agent never has access to your private keys. It can only propose unsigned transactions. You review and sign in your own wallet.

Supported AI agents

Any MCP-compatible AI tool works with y0

Windsurf

Codeium

Windsurf by Codeium supports MCP. Connect y0 as an MCP server and use blockchain tools alongside your AI-powered coding assistant.

MCP server support
Parallel tool execution
Codeium AI integration

Cursor

Cursor IDE supports MCP servers. Add y0 to your Cursor config and interact with blockchains directly from your development environment.

IDE-integrated blockchain access
Code-context-aware queries
Developer workflow integration

ChatGPT

OpenAI

OpenAI's ChatGPT works through function calling. The y0 SDK wraps MCP tools as OpenAI functions, enabling GPT-4 to interact with blockchains.

Function calling integration
GPT-4 and GPT-4o support
Custom GPT compatible

Claude

Anthropic

Anthropic's Claude supports MCP natively. Add y0 as an MCP server and Claude can check balances, build swaps, and manage approvals through natural conversation.

Native MCP support
Conversational transaction building
Multi-step portfolio analysis

What AI agents can do with y0

Natural language commands → blockchain transactions

📊

Portfolio monitoring

"What is my ETH balance across all chains?" — AI reads balances from all connected wallets and shows a unified view.

read

🔄

Token swaps

"Swap 500 USDC to ETH on Arbitrum" — AI finds the best route via 1inch/0x, builds the tx, you approve in your wallet.

write

🌉

Cross-chain bridges

"Bridge 1 ETH from Ethereum to Base" — AI routes through LI.FI, finds the cheapest bridge, you approve the transaction.

write

💹

Price checks

"What is the price of SOL right now?" — AI fetches real-time prices via CoinGecko. No transaction needed.

read

⛽

Gas estimation

"How much would it cost to swap on Ethereum right now?" — AI checks current gas prices and gives USD estimates.

read

📤

Token transfers

"Send 50 USDC to 0xABC..." — AI builds an unsigned transfer tx. You review recipient, amount, and gas before approving.

write

How the signing flow works

AI proposes, you approve, your wallet signs

🤖

AI Agent

You say "swap 100 USDC to ETH". The AI calls the y0 MCP swap tool.

→

⌨️

MCP Server

y0 finds the best route, builds an unsigned transaction, sends it to the signing service.

→

🌐

Signing Service

Queues the unsigned tx, sends a push notification to your device.

→

⚡

y0 App

You open app.y0.exchange or the y0 mobile app. Review amount, token, route, gas.

→

👛

Your Wallet

You approve — MetaMask/Phantom/Trust Wallet signs the tx and broadcasts it to the chain.

Quick start

Get your AI agent on-chain in 3 steps — no install needed

Get API Key

y0_your_api_key_here

Add Connector

In your AI app (Claude, ChatGPT): Settings → Connectors → Add custom connector

Name: y0
URL:  https://mcp.y0.exchange/mcp
       ?key=YOUR_API_KEY

Use

Talk to your AI in natural language — no coding needed

"What is my ETH balance?

 Swap 100 USDC to ETH
 on Ethereum."

Give your AI agent blockchain superpowers

Free tier: full mainnet access, all 10 tools, unlimited wallets and transactions.

Read the Docs Open y0 App