Token Revoke MCP

Securely manage and revoke ERC-20 token allowances across multiple EVM chains

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Token Revoke MCP is a Model Context Protocol (MCP) server designed to enhance security by allowing users to check and revoke ERC-20 token allowances on over 50 EVM-compatible chains. It provides endpoints to fetch token approval data for wallets, submit revocation transactions, and check transaction statuses. The service leverages the Moralis API for blockchain data and supports natural language interactions for ease of use. It is intended to give users granular control over their token approvals and exposure.

Key Features

Fetch all ERC20 token approvals for a wallet on multiple chains

Display token balances, symbols, and USD values at risk

Submit transactions to revoke token allowances for specific spenders

Check status of revocation transactions (pending, success, failure)

Multi-chain support for over 50 EVM-compatible networks

Natural language prompt interpretation for user-friendly operation

Integration with Moralis API for real-time blockchain data

Configurable via environment variables (API keys, private key)

Detailed chain support including mainnets and testnets

MIT licensed for open usage

Use Cases

Auditing all ERC20 token approvals for a given wallet

Revoking unnecessary or risky token allowances programmatically

Monitoring transaction status of token revocation operations

Securing wallets by minimizing ERC20 approval exposure

Providing security tools to DeFi users and platforms

Automating response to potential ERC20 approval exploits

Managing multi-chain token approvals in a unified interface

Integrating revocation checks into wallet UIs or bots

Offering compliance and reporting tools for enterprise wallets

Enabling developers to build enhanced security workflows for crypto wallets

README

Token Revoke MCP

An MCP server for checking and revoking ERC-20 token allowances, enhancing security and control.

Features

Fetch Token Approvals: Retrieve all ERC20 token approvals for a wallet on a specified chain, including token details, balances, and USD values at risk.
Revoke Allowances: Submit transactions to revoke ERC20 token allowances for specific spenders.
Check Transaction Status: Verify the success or failure of submitted transactions using transaction hashes.
Multi-Chain Support: Supports over 50 EVM-compatible chains, including mainnets (e.g., Ethereum, Polygon, BSC) and testnets (e.g., Goerli, Mumbai).

Prerequisites

Node.js: Version 18 or higher (for native fetch support).
Moralis API Key: Required for fetching token approval data.
Private Key: An Ethereum-compatible private key for signing revocation transactions.

Installation

Clone the Repository:

bash

git clone https://github.com/kukapay/token-revoke-mcp.git
cd token-revoke-mcp

Install Dependencies:
bash
```
npm install
```

Client Configuration:

json

{
  "mcpServers": {
    "token-revoke-mcp": {
      "command": "node",
      "args": ["path/to/token-revoke-mcp/index.js"],
      "env": {
        "MORALIS_API_KEY": "your moralis api key",
        "PRIVATE_KEY": "your wallet private key"
      }
    }
  }
}

Usage

Below are examples of how you might interact with the server using natural language prompts as input. The outputs are the raw text values from the content array returned by the server, assuming a client translates the prompts into tool calls.

Example 1: Fetch Token Approvals

Input Prompt:

"Show me all the token approvals for my wallet on Polygon."

Output Response:

[
  {
    "tokenAddress": "0x2791bca1f2de4661ed88a30c99a7a9449aa84174",
    "tokenSymbol": "USDC",
    "balance": "100.5",
    "usdPrice": "1.00",
    "usdValueAtRisk": "50.25",
    "spenderAddress": "0x1111111254eeb25477b68fb85ed929f73a960582",
    "approvedAmount": "1000.0",
    "transactionHash": "0xabc...",
    "timestamp": "2023-10-01T12:00:00Z"
  }
]

Example 2: Revoke an Allowance

Input Prompt:

"Revoke the allowance for token 0x2791bca1f2de4661ed88a30c99a7a9449aa84174 to spender 0x1111111254eeb25477b68fb85ed929f73a960582 on BSC."

Output Response:

Allowance revocation submitted on bsc. Transaction hash: 0x123.... Note: Transaction is not yet confirmed.

Example 3: Check Transaction Status

Input Prompt:

"Did my transaction 0x123... on BSC go through?"

Output Response (possible outputs):

Pending:

Transaction 0x123... on bsc is still pending or not found.

Success:

Transaction 0x123... on bsc has completed with status: successful. Block number: 12345.

Failure:

Transaction 0x123... on bsc has completed with status: failed. Block number: 12345.

Supported Chains

The server supports a wide range of EVM-compatible chains based on the Moralis JS SDK’s chaindata.ts. Examples include:

Mainnets: ethereum, polygon, bsc, avalanche, fantom, arbitrum, optimism, etc.
Testnets: goerli, mumbai, bsc testnet, arbitrum goerli, optimism sepolia, etc.
Full list: See SUPPORTED_CHAINS in server.js.

License

This project is licensed under the MIT License. See the LICENSE file for details.

Star History

Repository Owner

kukapay

User

Repository Details

Language JavaScript

Default Branch main

Size 19 KB

Contributors 1

License MIT License

MCP Verified Nov 12, 2025

Programming Languages

JavaScript

100%

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Token Revoke MCP

Key Features

Use Cases

README

Token Revoke MCP

Features

Prerequisites

Installation

Usage

Example 1: Fetch Token Approvals

Example 2: Revoke an Allowance

Example 3: Check Transaction Status

Supported Chains

License

Star History

Repository Owner

Repository Details

Programming Languages

Tags

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