L2 Chain Balance Scout

The problem

Manually querying Ethereum L2 data requires juggling multiple JSON-RPC methods, hex conversions, and explorer APIs. Developers often waste time writing boilerplate code just to check a wallet balance or verify an NFT's metadata on Base.

What it does

• Queries native ETH balances and current gas prices on the Base network.
• Retrieves ERC-20 and ERC-721 token details, including balances, symbols, and names.
• Fetches transaction history and specific token transfer logs via Basescan.
• Checks NFT metadata URLs and L1 to L2 bridge status.
• Calculates real-time USD valuations for assets using integrated pricing data.

Frameworks & tools

Base (Ethereum L2), JSON-RPC, Basescan API, CoinGecko API, and Python/cURL for data retrieval.

Why this beats prompting it yourself

Standard LLMs struggle with hex decoding, padding requirements for contract calls, and specific L2 endpoint configurations. This skill provides the exact data structures and conversion logic needed to interact with the chain without manual calculation errors.

Use cases

• Audit a wallet for specific ERC-20 token holdings and USD values.
• Verify if a specific NFT ID has been minted and retrieve its metadata.
• Monitor recent transaction history for a specific contract or address.
• Check current network congestion and gas costs for deployment planning.

Known limitations

Read-only operations only. Cannot submit transactions or sign messages. Requires a Basescan API key for transaction history features. Pricing data may lag by several seconds.