A Model-Context-Protocol server for interacting with multiple blockchains including Solana and Ethereum. This server provides simple RPC endpoints for common blockchain operations.

Features

Solana Operations:

Get current slot number
Check SOL account balances
Get detailed account information
Display keypair information
Transfer SOL between accounts
View SPL token balances
Get detailed SPL token account information

Ethereum Operations:

Check ETH account balances
Check ERC-20 token balances

Quickstart

clone and install dependencies:

git clone https://github.com/strangelove-ventures/web3-mcp.git
cd web3-mcp
npm install

build the tool

npm run build

add the tool to your claude_desktop_config.json

"web3-rpc": {
            "command": "node",
            "args": [
                "/PATH/TO/web3-mcp/build/index.js"
            ]
        }

Usage

Ask Claude:

whats the latest slot on solana?
whats the balance of 62QXuWZ3WT6ws1ZFxJobVDVXn6bEsiYpLo5yG612U6u3?
Here's my test key [REPLACE WITH SECRET KEY]. let's transfer 0.001 SOL to [REPLACE WITH PUBLIC ADDRESS]
what's the balance of 0x556437c4d22ceaeeebf82006b85bdcc0ae67d933?

Security Note

Only use this with a test wallet with a small amount of funds.

RPC Endpoint

The server connects to Solana's mainnet at https://api.mainnet-beta.solana.com. To use a different network (like devnet or testnet), modify the SOLANA_RPC constant in src/index.ts.