Agent skill

optimizing-gas-fees

Optimize blockchain gas costs by analyzing prices, patterns, and timing. Use when checking gas prices, estimating costs, or finding optimal windows. Trigger with phrases like "gas prices", "optimize gas", "transaction cost", "when to transact".

View SKILL.md on GitHub Repository
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Install this agent skill to your Project

npx add-skill https://github.com/jeremylongshore/claude-code-plugins-plus-skills/tree/main/plugins/crypto/gas-fee-optimizer/skills/optimizing-gas-fees

SKILL.md

Optimizing Gas Fees

Overview

Gas fee optimization skill that:

  • Fetches real-time gas prices from multiple sources
  • Estimates transaction costs in ETH and USD
  • Analyzes historical patterns to find optimal timing
  • Predicts future gas prices
  • Compares gas across multiple chains

Prerequisites

  • Python 3.8+ with requests library
  • Network access to RPC endpoints
  • Optional: ETHERSCAN_API_KEY for higher rate limits
  • Optional: Custom RPC URLs via environment variables

Instructions

  1. Check current gas prices (optionally for a specific chain):
    bash
    cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py current
cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py current --chain polygon
  2. Estimate transaction cost for known operations or custom gas limits (available operations: eth_transfer, erc20_transfer, erc20_approve, uniswap_v2_swap, uniswap_v3_swap, sushiswap_swap, curve_swap, nft_mint, nft_transfer, opensea_listing, aave_deposit, aave_withdraw, compound_supply, compound_borrow, bridge_deposit):
    bash
    cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py estimate --operation uniswap_v2_swap --all-tiers
cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py estimate --gas-limit 150000 --tier fast  # 150000 = configured value
  3. Find the optimal transaction window with lowest expected gas:
    bash
    cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py optimal
  4. View gas patterns (hourly or daily):
    bash
    cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py patterns
cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py patterns --daily
  5. Predict future gas prices for a given hour:
    bash
    cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py predict --time 14
  6. Compare gas prices across multiple chains:
    bash
    cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py compare
  7. View base fee history for recent blocks:
    bash
    cd ${CLAUDE_SKILL_DIR}/scripts && python3 gas_optimizer.py history --blocks 50

Output

  • Current: Base fee, priority fee, and tier prices (slow/standard/fast/instant)
  • Estimate: Gas cost in native token and USD for each tier
  • Patterns: Historical hourly/daily patterns with low-gas markers
  • Optimal: Recommended transaction window with expected savings
  • Predict: Gas forecast for specific time with confidence
  • Compare: Side-by-side gas prices across chains

Supported Chains

Chain Native Token Block Time
Ethereum ETH ~12 sec
Polygon MATIC ~2 sec
Arbitrum ETH ~0.25 sec
Optimism ETH ~2 sec
Base ETH ~2 sec

Price Tiers

Tier Percentile Confirmation Time
Slow 10th 10+ blocks (~2+ min)
Standard 50th 3-5 blocks (~1 min)
Fast 75th 1-2 blocks (~30 sec)
Instant 90th Next block (~12 sec)

Error Handling

See ${CLAUDE_SKILL_DIR}/references/errors.md for:

  • RPC connection issues
  • API rate limiting
  • Price feed errors
  • Pattern analysis errors

Examples

See ${CLAUDE_SKILL_DIR}/references/examples.md for:

  • Quick start commands
  • Cost estimation scenarios
  • Multi-chain comparison
  • Practical workflows

Resources

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