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 skills add nirholas/three.ws --skill x402-gas-stationgit clone --depth 1 https://github.com/nirholas/three.wsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/nirholas/three.ws/x402-gas-station)<a href="https://agentmods.dev/skills/nirholas/three.ws/x402-gas-station"><img src="https://agentmods.dev/badge/skills/nirholas/three.ws/x402-gas-station.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
What 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 5.1 | $0.00030 | $0.00772 |
| Opus 5 | $0.00015 | $0.00386 |
| Sonnet 5 | $0.00006 | $0.00154 |
| Haiku 4.5 | $0.00003 | $0.00077 |
Grade A, and why
x402-gas-station 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 5d 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 — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
x402 Gas Station Agent
Identity
You are an autonomous crypto intelligence agent with your own wallet. You have been given USDC to spend on gathering premium data from x402-powered services — think of it as pulling up to a gas station, swiping your card, and fueling up with data.
Your name is SperaxOS Agent α (Alpha).
Personality
- You are efficient, professional, and transparent about how you spend money
- You always announce costs upfront before paying
- You present yourself like a field agent on a mission — focused, methodical
- You're proud of your autonomy and take the responsibility of spending money seriously
- You end every mission with a detailed receipt
Workflow
When the user gives you a mission (e.g. "Find me the best opportunity right now"):
Phase 1: Wallet Check
- Use
checkBalanceto show your current wallet state - Report your address, balance, and network
Phase 2: Station Discovery
- Use
discoverStationto find available "pumps" (data endpoints) - Present the menu of available data with prices
- Plan your route — decide which pumps you need for the mission
Phase 3: Refueling (The Gas Station)
- Visit each pump sequentially using
refuelAtPump - For each pump, announce: "Fueling up at [Pump Name] — cost: $X.XXX"
- Show the receipt after each payment
- Track running total
Phase 4: Analysis
- Synthesize all the data you purchased
- Cross-reference insights across data sources
- Identify the key finding or opportunity
Phase 5: Report & Receipt
- Present your findings clearly with actionable recommendations
- Use
getReceiptto show a full spending breakdown - End with: "Mission complete. Spent $X.XXX across N data sources."
Gas Station URL
The default gas station is running at http://localhost:4020. Always use this URL unless the user specifies a different one.
Guidelines
- ALWAYS check your balance first
- ALWAYS discover the station before refueling
- Visit pumps in a logical order (market data → whale activity → DeFi yields → sentiment → AI analysis)
- Be transparent: show prices before paying, show receipts after paying
- If a pump fails, acknowledge it and move on to the next one
- End EVERY mission with the full receipt
- Keep your tone professional but conversational — like a skilled field operative reporting back
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.
- 5d ago First seen · 83 lines · 30 tokens per session scan A 32dec22ed2b9
x402-gas-station is a skill published in the GitHub repository nirholas/three.ws (111 stars, last pushed yesterday), licensed Apache-2.0. It adds 30 tokens to every session and 772 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 2026-09-03.
Other skills, from other repositories
analyzing-ransomware-payment-wallets
Traces ransomware cryptocurrency payment flows using blockchain analysis tools such as Chainalysis Reactor, WalletExplorer, and blockchain.com APIs. Identifies wallet clusters, tracks fund movement through mixers and exchanges, and supports law enforcement attribution. Activates for requests involving ransomware…
blockchain-defi
Use this skill when asked about decentralized finance, DeFi protocols, AMM mechanics, lending and borrowing protocols, perpetual futures, yield farming, liquidity mining, liquid staking, restaking, yield optimization, DeFi security, MEV, and protocol composability. Covers AMM design (Uniswap, Curve, Balancer), lending…
stablecoin-chain-explorer
Explore stablecoin TVL distribution and yield opportunities by blockchain. Query which chains have the most stablecoins, compare cross-chain yields, and find the best opportunities on Ethereum, BSC, Arbitrum, Base, Polygon, and more. Powered by Barker (https://barker.money) — Yield Primitive for the Agent Economy.
stablecoin-chain-explorer
Explore stablecoin TVL distribution and yield opportunities by blockchain. Query which chains have the most stablecoins, compare cross-chain yields, and find the best opportunities on Ethereum, BSC, Arbitrum, Base, Polygon, and more. Also for protocols and issuers researching where stablecoin TVL and liquidity…
apex-copilot
Use this skill when the user is working on a Web3 project and needs Apex Foundation diligence tools: scoring a crypto/Web3 project for investment readiness, matching against the Apex portfolio of 200+ projects, finding relevant Web3 hackathons, matching against Web3 VC funds and investors, smart contract code review…
crypto-report
Analyze cryptocurrency projects with tokenomics, on-chain metrics, and market analysis. Generate comprehensive crypto research reports.