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base

Retrieve Base on-chain data with live USD pricing for wallets and transactions.

Updated May 5, 2026
Search Tags:#web3#transaction analysis#base#gas analysis#wallet portfolio#ethereum l2#coingecko pricing
One-click install
npx skills add https://github.com/Z43L/zeus-agent --skill base-z43l
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: base
Source: https://github.com/Z43L/zeus-agent/tree/main/optional-skills/blockchain/base
Command: npx skills add https://github.com/Z43L/zeus-agent --skill base-z43l

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

Answering questions about wallet balances, token details, transactions, gas costs, and contract behavior on Base often requires manually stitching together multiple sources and handling rate limits, so users need a single, reliable way to query on-chain data and enrich it with USD values.

Core Features & Use Cases

  • Wallet portfolio (ETH + known ERC-20s): Retrieve ETH balance and holdings for well-known Base tokens, including estimated USD values, with dust filtering and top-N limiting.
  • Transaction inspection: Look up a transaction by hash and get decoded transfer events, gas used, and total fee context including L1 posting fee when available.
  • Token and contract intelligence: Fetch ERC-20 metadata (name/symbol/decimals/total supply) and inspect addresses for EOA vs contract, ERC-721/1155 support, and EIP-1967 proxy implementation details.
  • Gas and network health: Estimate L2 execution cost context for common actions and report live chain stats like latest block, chain id, gas price, and ETH price in USD.
  • Whale detection (latest block): Detect large ETH transfers in the most recent block and attach USD values.

Quick Start

Query a Base wallet portfolio with USD valuations for the address you provide.

Frequently Asked Questions about base

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I check a Base wallet portfolio with USD pricing?▼

To check a Base wallet portfolio, retrieve the ETH balance and known ERC-20 holdings for a specific address, then enrich the token amounts with live CoinGecko USD pricing. This process includes dust filtering and top-N limiting to display only significant asset values.

Can I inspect a Base transaction hash and see decoded ERC transfer events?▼

Yes, you can inspect a Base transaction by its hash to retrieve decoded transfer events and gas used. The transaction inspection also provides total fee context, including the L1 posting fee when available, to explain full execution costs.

Does this approach fetch Base ERC-20 metadata and detect proxy contracts?▼

Fetching Base ERC-20 metadata retrieves token name, symbol, decimals, and total supply. Contract inspection further detects whether an address is an EOA or contract, checks ERC-721/1155 support, and identifies EIP-1967 proxy implementation details.

What is the best way to estimate Base gas costs and check network health?▼

The best way to estimate Base gas costs is to retrieve L2 execution cost context for common actions. Network health reporting provides live chain stats including the latest block, chain id, gas price, and live ETH price in USD.

How do I detect large ETH whale transfers on the Base network?▼

Whale detection on the Base network identifies large ETH transfers within the most recent mined block. It automatically attaches live CoinGecko USD values to these transactions to quantify the scale of the asset movements.

Do I need a specific Base RPC endpoint to query on-chain data?▼

You need a Base RPC endpoint to query on-chain data via standard Ethereum JSON-RPC calls, defaulting to mainnet.base.org if none is provided. The system handles free-tier rate-limiting and allows optional price skipping if CoinGecko lookups are unnecessary.

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