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.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add ucai --env ETHERSCAN_API_KEY='<ETHERSCAN_API_KEY>' --env PRIVATE_KEY='<PRIVATE_KEY>' -- uvx abi-to-mcp~/.codex/config.toml
[mcp_servers.ucai]
command = "uvx"
args = ["abi-to-mcp"]
env = { ETHERSCAN_API_KEY = "<ETHERSCAN_API_KEY>", PRIVATE_KEY = "<PRIVATE_KEY>" }
# codex mcp add ucai --env ETHERSCAN_API_KEY='<ETHERSCAN_API_KEY>' --env PRIVATE_KEY='<PRIVATE_KEY>' -- uvx abi-to-mcp~/.cursor/mcp.json
{
"mcpServers": {
"ucai": {
"command": "uvx",
"args": [
"abi-to-mcp"
],
"env": {
"ETHERSCAN_API_KEY": "<ETHERSCAN_API_KEY>",
"PRIVATE_KEY": "<PRIVATE_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"ucai": {
"type": "stdio",
"command": "uvx",
"args": [
"abi-to-mcp"
],
"env": {
"ETHERSCAN_API_KEY": "<ETHERSCAN_API_KEY>",
"PRIVATE_KEY": "<PRIVATE_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"ucai": {
"command": "uvx",
"args": [
"abi-to-mcp"
],
"env": {
"ETHERSCAN_API_KEY": "<ETHERSCAN_API_KEY>",
"PRIVATE_KEY": "<PRIVATE_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"ucai": {
"command": "uvx",
"args": [
"abi-to-mcp"
],
"env": {
"ETHERSCAN_API_KEY": "<ETHERSCAN_API_KEY>",
"PRIVATE_KEY": "<PRIVATE_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"ucai": {
"command": "uvx",
"args": [
"abi-to-mcp"
],
"env": {
"ETHERSCAN_API_KEY": "<ETHERSCAN_API_KEY>",
"PRIVATE_KEY": "<PRIVATE_KEY>"
}
}
}
}Environment variables
ETHERSCAN_API_KEYPRIVATE_KEY
Replace the placeholders with your own credentials and keep them out of version control.