Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/obolnetwork/obol-stack/gasnpx skills add ObolNetwork/obol-stack --skill gasgit clone --depth 1 https://github.com/ObolNetwork/obol-stackWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00047 | $0.01795 |
| Opus 5 | $0.00023 | $0.00898 |
| Sonnet 5 | $0.00009 | $0.00359 |
| Haiku 4.5 | $0.00005 | $0.00179 |
Grade A, and why
gas scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Gas & Costs on Ethereum
What You Probably Got Wrong
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.
- Base fee: ~0.05 gwei (not 30-100 gwei)
- Priority fee (tip): ~0.01-0.05 gwei
- ETH price: ~$1,960 (not $2,500-3,000)
What Things Actually Cost (Feb 2026)
| 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 |
Mainnet vs L2 Costs (Feb 2026)
| 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.
Why Gas Dropped 95%+
- EIP-4844 (Dencun, March 2024): Blob transactions — L2s post data as blobs instead of calldata, 100x cheaper. L2 batch cost went from $50-500 to $0.01-0.50.
- Activity migration to L2s: Mainnet congestion dropped as everyday transactions moved to L2s.
- Pectra (May 2025): Doubled blob capacity (3→6 target blobs).
- Fusaka (Dec 2025): PeerDAS + 8-second slots.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 149 lines · 47 tokens per session scan A 4a32380d0ef9
gas is a skill published in the GitHub repository ObolNetwork/obol-stack (11 stars, last pushed 3d ago), licensed Apache-2.0. It adds 47 tokens to every session and 1,795 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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