What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Crypto & blockchain
You need to fill in: ETHERSCAN_API_KEY, PRIVATE_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: WEB3_PROVIDER_URL, ETHERSCAN_API_KEY, PRIVATE_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "abi-to": {
      "command": "uvx",
      "args": [
        "abi-to-mcp"
      ],
      "env": {
        "WEB3_PROVIDER_URL": "your-value",
        "ETHERSCAN_API_KEY": "your-value",
        "PRIVATE_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add abi-to --env WEB3_PROVIDER_URL=your-value --env ETHERSCAN_API_KEY=your-value --env PRIVATE_KEY=your-value -- uvx abi-to-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "abi-to": {
      "command": "uvx",
      "args": [
        "abi-to-mcp"
      ],
      "env": {
        "WEB3_PROVIDER_URL": "your-value",
        "ETHERSCAN_API_KEY": "your-value",
        "PRIVATE_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "abi-to": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "abi-to-mcp"
      ],
      "env": {
        "WEB3_PROVIDER_URL": "your-value",
        "ETHERSCAN_API_KEY": "your-value",
        "PRIVATE_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

WEB3_PROVIDER_URL env
Ethereum JSON-RPC endpoint URL
ETHERSCAN_API_KEY secret env
Etherscan API key for fetching verified contract ABIs
PRIVATE_KEY secret env
Private key for signing transactions (write operations)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account nirholas, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Crypto & blockchaini

More stars than 0% of the other 1614 servers in this category
Published to the registry more recently than 1% of the other 1614 servers in this category
Basic checks equal to or better than 100% of the other 1614 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is UCAI safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: ETHERSCAN_API_KEY, PRIVATE_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 10 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: gasrescue, xsolana, CashPan

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

gasrescue

by gasrescue

Rescue USDC, USDT and USDG from wallets with no gas: send or swap them on EVM, Solana and Tron.

Runs on your computerUpdated today

Install

xsolana

by XGamesFun

Design, check, simulate and launch Solana game economies on loot, one shared program, no contract.

Runs on your computerUpdated today

Install

CashPan

by cashpan.app

Give your AI an allowance: pay approved people within on-chain spending limits.

Runs in the cloudUpdated today

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Universal Contract AI Interface

The ABI-to-MCP Server Generator

    ██╗   ██╗ ██████╗ █████╗ ██╗

██║ ██║██╔════╝██╔══██╗██║ ██║ ██║██║ ███████║██║ ██║ ██║██║ ██╔══██║██║ ╚██████╔╝╚██████╗██║ ██║██║ ╚═════╝ ╚═════╝╚═╝ ╚═╝╚═╝

Any contract. One command. Claude speaks it.

🙇♀️ Universal Contract AI Interface ☑️ UCAI in Anthropic MCP Registry | 🌐 Try the Web Builder → | 📖 Documentation | 🛡️ Security Scanner

🌐 Try It Live — No Install Required

[mcp.ucai.tech](https://mcp.ucai.tech) — Generate MCP servers directly in your browser.

+--------------------------------------------------------------------------+

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=ethereum to 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

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 defines

📋 Tool schemas — How contract functions become AI-callable tools
🔄 Type mappings — Solidity → JSON Schema → Python
🔒 Safety patterns — Simulation-first for all state changes
📡 Event queries — Historical data access patterns

Why UCAI

🔁 Repeatable — Same pattern works for ERC20, ERC721, DeFi, DAOs, Solana, anything
🔒 Safe by default — All write operations simulate first
🌐 Universal — Works on any chain, with any AI agent
🤖 AI-native — Designed specifically for LLM tool-calling

Every contract becomes AI-accessible through the same interface. No custom code per contract.

*This package (abi-to-mcp) is the reference implementation of UCAI for MCP.*

Why UCAI?

The Problem: You want AI to interact with smart contracts. But:

Writing MCP server boilerplate is tedious
Mapping Solidity types to JSON Schema is error-prone
Every contract needs the same patterns repeated
Safety (simulation, gas limits) is easy to forget

The Solution: One command generates a production-ready MCP server from any ABI.

Manual Approach	With abi-to-mcp
Read contract ABI	`abi-to-mcp generate 0x...`
Write 15+ tool functions	✅ Auto-generated
Map types (address → string, uint256 → string)	✅ Handled
Add transaction simulation	✅ Built-in
Handle events as resources	✅ Included
~2-4 hours per contract	~10 seconds

Use Cases

AI Agent Builders — Give your agent DeFi superpowers (swap, lend, vote)
Wallet Developers — Let Claude explain and execute transactions
DAO Tooling — AI-powered proposal creation, voting, treasury management
DeFi Dashboards — Natural language queries for on-chain data
Vibecoders — Ship faster with AI-generated blockchain tools

Real Examples

🦄 Uniswap: Swap tokens with natural language

abi-to-mcp generate 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D -o ~/uniswap-server

Only the beginning is shown; read the rest in the repo

UCAI

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Crypto & blockchaini

Common questions

Alternatives

gasrescue

xsolana

CashPan

README from the maker

Universal Contract AI Interface

The ABI-to-MCP Server Generator

🌐 Try It Live — No Install Required

Overview

Uniswap — Claude can swap tokens

ETH 2.0 Beacon Deposit — Claude can explore staking

Any verified contract works

Quick Start

1. Generate a server

2. Connect to Claude Desktop

3. Ask Claude anything

Example

The UCAI Standard

Why UCAI?

Use Cases

Real Examples

🦄 Uniswap: Swap tokens with natural language