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 all EVM chains. Ethereum, BNB Chain, Arbitrum, Base, Polygon — with more coming.
- 5 EVM chains at launch
- Solana, Avalanche planned
- Chain-specific gas estimation
- Cross-chain bridge via LI.FI
Three-Tier Approval
Flexible approval model: auto-execute (session keys), quick approve (biometric), or full manual review.
- ERC-4337 session keys
- User-defined spending limits
- Biometric quick approve
- Full tx review for large amounts
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