Claude-skill-registry evm-contract-source

Use this skill when the user asks to "get contract source code", "show verified contract", "fetch source from etherscan", "view smart contract code", or mentions viewing verified source code on EVM chains (Ethereum, Polygon, Arbitrum, etc.). Requires a contract address and optional chain parameter.

install

source · Clone the upstream repo

git clone https://github.com/majiayu000/claude-skill-registry

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/evm-contract-source" ~/.claude/skills/majiayu000-claude-skill-registry-evm-contract-source && rm -rf "$T"

manifest: skills/data/evm-contract-source/SKILL.md

source content

EVM Contract Source Fetcher

Fetches verified smart contract source code from block explorers (Etherscan, Polygonscan, etc.).

Usage

Run the script with address and optional chain:

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

Arguments

```
address
```
(required): Contract address in hex format (0x + 40 hex characters). ENS names are NOT supported.
```
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
API key must be set for the target chain:
- ```
ETHERSCAN_API_KEY
```
  for Ethereum (also used as fallback for other chains)
- ```
POLYGONSCAN_API_KEY
```
  for Polygon
- ```
ARBISCAN_API_KEY
```
  for Arbitrum
- ```
OPTIMISM_API_KEY
```
  for Optimism
- ```
BASESCAN_API_KEY
```
  for Base
- ```
BSCSCAN_API_KEY
```
  for BSC

Examples

# Get WETH source on Ethereum
${CLAUDE_PLUGIN_ROOT}/scripts/crypto-evm-contract-source.sh 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

# Get QuickSwap Router source on Polygon
${CLAUDE_PLUGIN_ROOT}/scripts/crypto-evm-contract-source.sh 0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff polygon

Note

For Solana program IDL, use the

sol-program-idl

skill instead.