Platform Features
Everything you need to let AI agents interact with blockchains — securely and non-custodially.
MCP Server
Model Context Protocol server exposing y0 as tools for AI agents. Claude, GPT, LangChain, AutoGPT — any MCP-compatible client.
- 10 tools: read + write
- npm package (@y0exchange/mcp)
- stdio + HTTP transports
- MIT-licensed, fully auditable
Signing Service
Transaction builder + approval queue. Builds unsigned transactions and routes them to users for signing on their own devices.
- Swap, send, bridge, approve builders
- PostgreSQL approval queue
- WebSocket real-time notifications
- 5-minute configurable timeout
Non-Custodial Architecture
y0 never holds, stores, or accesses private keys. All signing happens client-side. This is the core security guarantee.
- User-only key control
- Open-source signing UI (MIT)
- No server-side key storage
- No money transmitter license needed
Multi-Chain Support
One unified API for 15 blockchains. Ethereum, BNB Chain, Arbitrum, Base, Polygon, Avalanche, Optimism, zkSync, Linea, Scroll, Blast, Gnosis, Mantle, Celo, and Solana.
- 14 EVM chains + Solana
- Chain-specific gas estimation
- Cross-chain bridge via LI.FI
- More chains being added
Full Review Approval
Every transaction requires your explicit review and approval. See all details — token, amount, recipient, gas — before signing.
- Push notification for every tx
- Full transaction detail view
- Approve or reject in one tap
- No auto-execution, ever
Developer SDKs
TypeScript and Python SDKs for direct API integration. Works with any AI framework.
- @y0exchange/sdk-js (TypeScript)
- @y0exchange/sdk-python (Python)
- LangChain compatible
- OpenAI function calling support
Open Core Licensing
Security-critical code is open-source. Backend services are managed SaaS. Best of both worlds.
- MCP server: MIT
- SDKs: MIT
- Signing UI: MIT
- Platform: Proprietary (SaaS)
DeFi Integrations
Built-in integrations with top DeFi protocols. Best-rate routing out of the box.
- 1inch swap API (primary)
- 0x Protocol (fallback)
- LI.FI cross-chain bridge
- CoinGecko price feeds