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@cheolwanpark/claude-plugins
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Use this skill when the user asks to "check balance", "what's the balance of", "is this a contract or EOA", "get address info", or mentions checking wallet balance or account type on blockchain. Requires an address and optional chain parameter.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name address-info
description Use this skill when the user asks to "check balance", "what's the balance of", "is this a contract or EOA", "get address info", or mentions checking wallet balance or account type on blockchain. Requires an address and optional chain parameter.
allowed-tools Bash

Address Info Fetcher

Gets balance and account type (EOA vs contract) for an Ethereum address.

Usage

Run the script with address and chain:

${CLAUDE_PLUGIN_ROOT}/scripts/crypto-address-info.sh <address> [chain]

Arguments

  • address (required): Wallet/contract address (0x...) or ENS name
  • chain (optional): Chain name - ethereum (default), polygon, arbitrum, optimism, base, bsc

Supported Chains

Chain Aliases Explorer
ethereum eth, mainnet Etherscan
polygon matic Polygonscan
arbitrum arb Arbiscan
optimism op Optimism Etherscan
base - Basescan
bsc binance BSCScan

Requirements

  • cast (Foundry) must be installed
  • RPC URL must be set for the target chain:
    • ETHEREUM_RPC_URL for Ethereum
    • POLYGON_RPC_URL for Polygon
    • ARBITRUM_RPC_URL for Arbitrum
    • OPTIMISM_RPC_URL for Optimism
    • BASE_RPC_URL for Base
    • BSC_RPC_URL for BSC

Examples

# Check vitalik.eth balance on Ethereum
${CLAUDE_PLUGIN_ROOT}/scripts/crypto-address-info.sh vitalik.eth

# Check address on Arbitrum
${CLAUDE_PLUGIN_ROOT}/scripts/crypto-address-info.sh 0x1234567890123456789012345678901234567890 arbitrum