Give your AI agent blockchain superpowers
Install the y0 MCP server and let Claude, GPT, or any AI agent read balances, get quotes, swap tokens, and send transactions — non-custodially.
npm install @y0exchange/mcpQuick start
Two ways to connect — remote (no install) or local
Get API Key
Sign in at app.y0.exchange → API Keys → Create
y0_your_api_key_hereAdd Connector
In Claude / ChatGPT: Settings → Connectors → Add custom connector. For Cursor / Windsurf: add to .cursor/mcp.json
https://mcp.y0.exchange/mcp
?key=YOUR_API_KEY
// Cursor / Windsurf:
npx @y0exchange/mcpUse
Ask your AI agent to interact with blockchains
"What is my ETH balance?
Swap 100 USDC to ETH
on Ethereum."10 MCP Tools
6 read-only + 4 write tools — all included in the free tier
get_balance
Native + ERC-20 token balances across chains
- read
get_portfolio
Aggregated portfolio with USD values
- read
get_price
Real-time token prices via CoinGecko
- read
get_quote
Swap/bridge quote with routing preview
- read
get_gas
Gas prices with USD estimates
- read
get_history
Transaction history with classification
- read
swap
Build unsigned swap tx via 1inch/0x
- write
send
Build unsigned transfer tx (native/ERC-20)
- write
bridge
Build unsigned bridge tx via LI.FI
- write
approve
Build unsigned ERC-20 approve tx
- write
Non-custodial write operations
Write tools never touch private keys. Here is how it works:
AI Agent
Calls swap/send tool via MCP protocol
MCP Server
Builds unsigned transaction, sends to signing service
Signing Service
Queues tx, sends push notification to user
y0 App
User opens app.y0.exchange or mobile app, reviews tx details
User Wallet
User approves — MetaMask/Phantom signs and broadcasts to chain
Supported chains
15 blockchains through a unified API
Start building today
Free tier: full mainnet access, all 10 tools, unlimited wallets & transactions.