Gas optimizer

Find the cheapest gas right now: Base gas, Ethereum gas, Base fee estimate, and ETH price for USD conversion.

When to use this pack

Timing a transaction — compare gas across chains and decide whether to act now or wait.

Tools in this pack

• Gas snapshot (slow / standard / fast) $0.005 POST /api/gas-snapshot Live gas price snapshot for a chain — slow / standard / fast tiers in gwei, plus the latest base fee. Sampled from eth_feeHistory (last 4 blocks, 25th/50th/90th percentile priority fees). Use to estimate before broadcasting a transaction from another tool.
• Gas price $0.002 GET /api/gas-estimate Current gas price (gwei and wei) on Base, Polygon, Arbitrum, Optimism, Ethereum, or Robinhood Chain — for an agent budgeting a transaction. Read-only. ?network=base
• Crypto price $0.010 GET /api/crypto-price Live crypto prices for one or many coins in any vs_currency (usd, eur, btc, eth, etc). Returns last price, 24h change %, 24h volume, and market cap per coin. Accepts ticker symbols (BTC, ETH, SOL) for the top ~50 by market cap, or canonical CoinGecko ids (e.g. "render-token") for any of the ~15k tracked coins. Batched: up to 25 coins per call. Backed by CoinGecko's public API — keyless.

Workflow

1. Get Base gas tiers (slow/standard/fast).
2. Get Ethereum gas tiers for comparison.
3. Get a Base fee estimate for a standard transfer.
4. Get ETH price to express costs in USD.

Run it in Claude

claude mcp add agent402 -s user -- npx -y agent402-mcp@latest

Then paste this prompt into Claude:

Find the cheapest gas right now using Agent402's gas-optimizer skill pack. Get (1) Base gas tiers, (2) Ethereum gas tiers, (3) Base fee estimate, (4) ETH price. Tell me the cost in USD and whether to act now or wait.

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