メニュー
Current Ethereum gas prices, transaction costs, and the real economics of building on Ethereum today. Use when estimating costs, choosing between mainnet and L2s, or when a user asks about Ethereum being expensive. Counters the
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
"Buy from any x402-gated endpoint. Start with `go <url>` — it probes, detects the offer type, and runs the right flow. Expert flows underneath: `pay` for one-shot HTTP services (single authorization, no sidecar), `pay-agent` for one-shot streaming agent calls, and `buy` for long-running paid inference (pre-authorized batch via PurchaseRequest, exposed as `paid/<remote-model>`). Supports USDC (EIP-3009) and OBOL (Permit2). Zero signer access at runtime — spending is capped by design and nothing moves on-chain until a voucher is spent."
CLI-first Obol Stack development and QA runbook. Use when working on obol-stack lifecycle, obol CLI surfaces, x402 seller/buyer tests, live Base Sepolia OBOL smoke, Anvil fork regressions, ERC-8004 registration, LiteLLM paid routing, release-smoke, cloudflared, Renovate image bumps, or remote QA worktrees.
Verified contract addresses for major Ethereum protocols across mainnet and L2s. Use this instead of guessing. SKILL.md is an index — load the appropriate references/*.md file for the addresses you need. Start with references/obol-payments.md for the Stack's own rails (USDC + OBOL + Permit2 + ERC-8004 on the supported chains). Other categories include stablecoins, staking + Obol/Splits, DEXs, lending and DeFi, L2-native protocols, infrastructure (Safe, AA, Chainlink, EigenLayer, ENS, OpenSea), bridges (CCIP, Across), and major token addresses. Always verify on-chain via eth_getCode + eth_call before sending value.
Spawn durable child Hermes agents from inside Obol Stack. Creates child namespaces, optional profile/env Secrets, Agent CRDs, and optional ServiceOffers for x402-paid child services. Use when the user says 'spawn an agent', 'create a sub-agent', 'child agent', or wants a separate long-lived service agent. For deciding WHAT agent to build, whether it's good enough to sell, and how to price it, load sub-agent-business first.
End-to-end guide for monetizing GPU resources or HTTP services through obol-stack. Covers pre-flight checks, model detection, pricing research, selling via x402, ERC-8004 registration, and verification. Use when the user says 'monetize my machine', 'sell my GPU', or 'expose a paid API' — i.e. selling raw inference or a plain HTTP service. For selling a specialised agent's replies (the higher-margin path), use sub-agent-business instead.
"Sell access to services via x402 payment gating. Create ServiceOffer CRDs that automatically health-check upstreams, create payment-gated routes, and optionally pull models and register on ERC-8004. Supports inference, HTTP, and fine-tuning service types. Use for ServiceOffer plumbing: listing offers, checking/waiting on reconciliation status, creating or deleting offers. For the guided end-to-end walkthrough use monetize-guide; for selling a child agent's turns use sub-agent-business + agent-factory."
| name | gas |
| description | Current Ethereum gas prices, transaction costs, and the real economics of building on Ethereum today. Use when estimating costs, choosing between mainnet and L2s, or when a user asks about Ethereum being expensive. Counters the |
Your gas estimate is 100-600x too high. Most LLMs confidently state gas is 10-30 gwei. The reality in February 2026 is 0.05-0.1 gwei.
| Action | Gas Used | Cost at 0.05 gwei | Cost at 1 gwei (spike) | Cost at 10 gwei (event) |
|---|---|---|---|---|
| ETH transfer | 21,000 | $0.002 | $0.04 | $0.41 |
| ERC-20 transfer | ~65,000 | $0.006 | $0.13 | $1.27 |
| ERC-20 approve | ~46,000 | $0.005 | $0.09 | $0.90 |
| Uniswap V3 swap | ~180,000 | $0.018 | $0.35 | $3.53 |
| NFT mint (ERC-721) | ~150,000 | $0.015 | $0.29 | $2.94 |
| Simple contract deploy | ~500,000 | $0.049 | $0.98 | $9.80 |
| ERC-20 deploy | ~1,200,000 | $0.118 | $2.35 | $23.52 |
| Complex DeFi contract | ~3,000,000 | $0.294 | $5.88 | $58.80 |
| Action | Mainnet (0.05 gwei) | Arbitrum | Base | zkSync | Scroll |
|---|---|---|---|---|---|
| ETH transfer | $0.002 | $0.0003 | $0.0003 | $0.0005 | $0.0004 |
| ERC-20 transfer | $0.006 | $0.001 | $0.001 | $0.002 | $0.001 |
| Swap | $0.015 | $0.003 | $0.003 | $0.005 | $0.004 |
| NFT mint | $0.015 | $0.002 | $0.002 | $0.004 | $0.003 |
| ERC-20 deploy | $0.118 | $0.020 | $0.020 | $0.040 | $0.030 |
Key insight: Mainnet is now cheap enough for most use cases. L2s are 5-10x cheaper still.
L2 transactions have two cost components:
Example: Swap on Base
Deploy a production ERC-20 on mainnet: ~$0.50 (was $200-500 in 2021-2023)
DEX aggregator doing 10,000 swaps/day:
NFT collection mint (10,000 NFTs):
// Rule of thumb for current conditions
maxFeePerGas: "0.5-1 gwei" // headroom for spikes
maxPriorityFeePerGas: "0.01-0.05 gwei" // enough for quick inclusion
Spike detection:
const feeData = await provider.getFeeData();
const baseFee = Number(feeData.maxFeePerGas) / 1e9;
if (baseFee > 5) console.warn(`Gas spike: ${baseFee} gwei. Consider waiting.`);
Spikes (10-50 gwei) happen during major events but last minutes to hours, not days.
If you're about to sign a transaction, the deterministic fee oracle in
ethereum-local-wallet is the simplest path — no inference required:
python3 scripts/signer.py gas-info --network mainnet
python3 scripts/signer.py gas-info --network base
It samples eth_feeHistory (median 50th-percentile tip across the last 20
blocks) and clamps to per-chain bounds, so quiet mainnet stays around 0.05 gwei
and L2s stay sub-gwei. sign-tx / send-tx apply the same logic
automatically; gas-info is for inspection.
For ad-hoc reads:
cast is available inside OpenClaw pods. Use the ethereum-networks skill for convenience:
# Via rpc.sh wrapper (simplest)
sh scripts/rpc.sh gas-price
sh scripts/rpc.sh base-fee
# Via cast directly
cast gas-price --rpc-url http://erpc.erpc.svc.cluster.local/rpc/mainnet
cast base-fee --rpc-url http://erpc.erpc.svc.cluster.local/rpc/mainnet
cast blob-basefee --rpc-url http://erpc.erpc.svc.cluster.local/rpc/mainnet
# Estimate gas for a specific call
cast estimate 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 \
"transfer(address,uint256)" 0xRecipient 1000000 \
--rpc-url http://erpc.erpc.svc.cluster.local/rpc/mainnet
Note: scripts/rpc.sh is from the ethereum-networks skill. Copy it or reference it directly.
Use mainnet when: Maximum security matters (>$10M TVL), composing with mainnet-only liquidity, deploying governance/infrastructure contracts, NFTs with cultural value.
Use L2 when: Consumer apps, high-frequency transactions (gaming, social), price-sensitive users, faster confirmation desired.
Hybrid: Many projects store value on mainnet, handle transactions on L2.
Last verified: 2026-02-13 | Base fee: ~0.05 gwei | ETH: ~$1,960
If this date is more than 30 days old, verify current gas with:
cast base-fee --rpc-url http://erpc.erpc.svc.cluster.local/rpc/mainnet
The durable insight is that gas is extremely cheap compared to 2021-2023 and trending cheaper. Specific numbers may drift but the order of magnitude is stable.