UCAI
Universal Contract AI Interface (UCAI) 🔗 ABI to MCP | The open standard for connecting AI agents to blockchain. MCP server generator for smart contracts. Claude + Uniswap, Aave, ERC20, NFTs, DeFi. Python CLI, Web3 integration, transaction simulation. Polygon, Arbitrum, Base, Ethereum EVM chains. Claude, GPT, LLM tooling, Solidity, OpenAI.
Install / Use
/learn @nirholas/UCAIAbout this skill
Quality Score
0/100
Category
Development & EngineeringSupported Platforms
Claude Code
Claude Desktop
Cursor
README
Universal Contract AI Interface
The ABI-to-MCP Server Generator
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Any contract. One command. Claude speaks it.
🌐 Try It Live — No Install Required
mcp.ucai.tech — Generate MCP servers directly in your browser.
+--------------------------------------------------------------------------+
| |
| MCP BUILDER [Connect Wallet] |
| |
| +---------------------------+--------------------------------------+ |
| | Pro Templates | Custom Contract | |
| +---------------------------+--------------------------------------+ |
| |
| Security Scanner: Score 87/100 - Low Risk |
| |-- Contract verified on Etherscan |
| |-- Uses OpenZeppelin (audited) |
| |-- Owner can pause transfers (warning) |
| +-- Mint function detected (warning) |
| |
| What This Contract Does: |
| "ERC-20 token with standard transfer, approve, and allowance |
| functions." |
| |
| [Download Server] [Share Link] [Copy Config] |
| |
+--------------------------------------------------------------------------+
Features:
- 🛡️ Security Scanner — Detects rug pulls, honeypots, and 50+ risks before you connect
- 📖 Contract Whisperer — Explains contracts in plain English
- ⚡ Pro Templates — Pre-built bundles for Flash Loans, Arbitrage, Yield Aggregators
- 🌙 Dark/Light Mode — Easy on the eyes
- 📥 ZIP Download — Complete server with
server.py,requirements.txt,README.md - 🔗 Share Links — Send
?address=0x...&network=ethereumto anyone
Overview
┌────────────────────────────────────────────────────────────────────────────┐
│ │
│ 1. FIND 2. GENERATE 3. DONE │
│ │
│ ┌─────────────────┐ ┌─────────────────┐ ┌───────────────┐ │
│ │ Etherscan │ │ │ │ │ │
│ │ ┌─────────┐ │ │ $ abi-to-mcp │ │ Claude │ │
│ │ │ Contract│ │ ────▶ │ generate │ ──▶ │ Tools │ │
│ │ │ ABI │ │ │ 0x7a25... │ │ │ │
│ │ └─────────┘ │ │ │ │ "Swap 1 ETH" │ │
│ └─────────────────┘ └─────────────────┘ └───────────────┘ │
│ │
│ Any contract One command AI speaks it │
│ │
└────────────────────────────────────────────────────────────────────────────┘
Found a contract on Etherscan? One command. Claude can now use it.
pip install abi-to-mcp
# Uniswap — Claude can swap tokens
abi-to-mcp generate 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D -o ~/uniswap-server
# ETH 2.0 Beacon Deposit — Claude can explore staking
abi-to-mcp generate 0x00000000219ab540356cBB839Cbe05303d7705Fa -o ~/eth-staking-server
# Any verified contract works
abi-to-mcp generate <ANY_CONTRACT_ADDRESS>
That's it. Every function, every event, every query — now a Claude tool.
Quick Start
1. Generate a server
abi-to-mcp generate 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D -o ~/uniswap-server
cd ~/uniswap-server && pip install -r requirements.txt
2. Connect to Claude Desktop
Add to your config (~/Library/Application Support/Claude/claude_desktop_config.json on Mac):
{
"mcpServers": {
"uniswap": {
"command": "python",
"args": ["/Users/YOU/uniswap-server/server.py"],
"env": {
"RPC_URL": "https://eth.llamarpc.com"
}
}
}
}
3. Ask Claude anything
- "What's the best route to swap 1 ETH for USDC?"
- "Get the reserves for the ETH/DAI pool"
- "Show me recent swaps on Uniswap"
Claude now speaks DeFi.
Example
┌────────────────────────────────────────────────────────────────────────────┐
│ YOU │
├────────────────────────────────────────────────────────────────────────────┤
│ "What's the best route to swap 1 ETH for USDC on Uniswap?" │
└────────────────────────────────────────────────────────────────────────────┘
│
▼
┌────────────────────────────────────────────────────────────────────────────┐
│ CLAUDE │
├────────────────────────────────────────────────────────────────────────────┤
│ I'll check the Uniswap router for the best path... │
│ │
│ Called: getAmountsOut(1 ETH, [WETH, USDC]) │
│ │
│ Best route: ETH -> WETH -> USDC │
│ You would receive: 3,847.23 USDC │
│ Price impact: 0.02% │
└────────────────────────────────────────────────────────────────────────────┘
│
▼
┌────────────────────────────────────────────────────────────────────────────┐
│ YOU │
├────────────────────────────────────────────────────────────────────────────┤
│ "Do it. Swap 1 ETH for USDC." │
└────────────────────────────────────────────────────────────────────────────┘
│
▼
┌────────────────────────────────────────────────────────────────────────────┐
│ CLAUDE │
├────────────────────────────────────────────────────────────────────────────┤
│ Simulating transaction first... │
│ │
│ Simulation successful │
│ Gas estimate: 152,847 (~$3.42) │
│ Expected output: 3,847.23 USDC │
│ │
│ Ready to execute. Confirm? [Yes/No] │
└────────────────────────────────────────────────────────────────────────────┘
The UCAI Standard
UCAI (Universal Contract AI Interface) is a standard for how AI agents interact with smart contracts.
╔═══════════════════════════════════════════════════════════════════════════════╗
║ ║
║ ┌─────────┐ ┌──────────────┐ ┌──────────────┐ ┌──────────┐ ║
║ │ │ │ │ │ │ │ │ ║
║ │ Claude │─────>│ abi-to-mcp │─────>│ MCP Server │─────>│ Chain │ ║
║ │ │ │ generate │ │ (your tools) │ │ │ ║
║ └─────────┘ └──────────────┘ └──────────────┘ └──────────┘ ║
║ │ │ │ ║
║ │ "swap 1 ETH" │ call swap() │ ║
║ └────────────────────────────────────────┴─────────────────────┘ ║
║ ║
╚═══════════════════════════════════════════════════════════════════════════════╝
**UCAI defin
