npx mcpbar@latest install Dablclub/polygon-mcp -c claude

npx mcpbar@latest edit -c claude

{
  "mcpServers": {
    "Polygon MCP Server": {
      "command": "node",
      "args": [
        "/path/to/polygon-mcp/build/index.js"
      ],
      "env": {
        "SEED_PHRASE": "your twelve word seed phrase here"
      },
      "disabled": false,
      "autoApprove": []
    }
  }
}

Polygon MCP Server

A Model Context Protocol (MCP) server that provides onchain tools for Claude AI, allowing it to interact with the Polygon PoS blockchain.

Features

• Call contract functions on Polygon PoS
• Get ERC20 token balances
• Transfer ERC20 tokens
• Get current gas prices

Installation

1. Clone this repository:

git clone https://github.com/your-username/polygon-mcp.git
cd polygon-mcp

2. Install dependencies:

npm install

3. Build the project:

npm run build

Configuration

Create a .env file in the root directory with the following variables:

SEED_PHRASE="your twelve word seed phrase here"

Usage

Running the server

npm start

Using with Claude

To use this MCP server with Claude, you need to add it to your MCP settings file:

For VSCode Claude extension:

{
  "mcpServers": {
    "polygon": {
      "command": "node",
      "args": ["/path/to/polygon-mcp/build/index.js"],
      "env": {
        "SEED_PHRASE": "your twelve word seed phrase here"
      },
      "disabled": false,
      "autoApprove": []
    }
  }
}

For Claude desktop app:

{
  "mcpServers": {
    "polygon": {
      "command": "node",
      "args": ["/path/to/polygon-mcp/build/index.js"],
      "env": {
        "SEED_PHRASE": "your twelve word seed phrase here"
      },
      "disabled": false,
      "autoApprove": []
    }
  }
}

Available Tools

call_contract

Call a contract function on Polygon PoS.

Parameters:

• contractAddress: The address of the contract to call
• functionName: The name of the function to call
• functionArgs: The arguments to pass to the function
• abi: The ABI of the contract
• value (optional): The value of MATIC to send with the transaction

erc20_balance

Get the balance of an ERC20 token on Polygon PoS.

Parameters:

• contractAddress: The address of the contract to get the balance of

erc20_transfer

Transfer an ERC20 token on Polygon PoS.

Parameters:

• contractAddress: The address of the contract to transfer the token from
• toAddress: The address of the recipient
• amount: The amount of tokens to transfer

get_gas_price

Get the current gas price on Polygon PoS.

License

MIT