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 Vo1ganin/crypto-claude-skills --skill nansengit clone --depth 1 https://github.com/Vo1ganin/crypto-claude-skillsWrote 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/vo1ganin/crypto-claude-skills/nansen)<a href="https://agentmods.dev/skills/vo1ganin/crypto-claude-skills/nansen"><img src="https://agentmods.dev/badge/skills/vo1ganin/crypto-claude-skills/nansen/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/vo1ganin/crypto-claude-skills/nansen"><img src="https://agentmods.dev/badge/skills/vo1ganin/crypto-claude-skills/nansen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00195 | $0.01929 |
| Opus 5 | $0.00097 | $0.00964 |
| Sonnet 5 | $0.00039 | $0.00386 |
| Haiku 4.5 | $0.00019 | $0.00193 |
Grade A, and why
nansen scanned grade A with 1 finding 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 11d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- Bash # direct curl / httpx How it starts
The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Nansen API Skill
Reference files:
references/endpoints.md— full catalog with credit cost per endpoint, Solana support flagsreferences/credits.md— pricing, budget rules, x402 pay-per-call, labels cost explosionreferences/filters.md— chains enum, smart money labels, filter schemasreferences/examples/— working Python scripts
🚨 Rule #1: credit budget awareness
Endpoint credit cost varies 150× between cheap and expensive endpoints:
| Tier | Cost (Pro) | Examples |
|---|---|---|
| Cheap | 1 credit | All Profiler (balances, tx, PnL), most TGM, Portfolio, Prediction Markets |
| Standard | 5 credits | ALL Smart Money endpoints, TGM indicators, counterparties |
| Premium labels | 150 credits | tgm/holders, tgm/pnl-leaderboard, tgm/perp-* when premium_labels: true |
| Labels | 100 / 500 | profiler/address/labels (common / premium) |
| Agent | 200 / 750 | agent/fast / agent/expert |
Free tier multiplier: ×10. A 150-credit call on Free costs 1500.
Budget rules (like Dune — independent per operation):
- < 50 credits → proceed
- 50–200 credits → tell the user your plan and expected cost before calling (e.g. "running 30× Smart Money dex-trades = 150 credits")
- > 200 credits → STOP, propose alternative (narrower filter, smaller page, different endpoint), ask for approval
Common credit traps:
premium_labels: truesilently 30×s the cost (5 → 150). Default isnull/omitted = plan-tier default. Only settruewhen user explicitly asks for premium labels.- Paginating 10× pages of Smart Money endpoint = 50 credits. Use
per_page: 1000(max) to consolidate. - Running
agent/expertcosts 750 credits — almost half the monthly Pro starter. Always confirm first. address/labelsfor N wallets = 100N credits. Useaddress/metadata/multion Solscan or other source if just name lookup needed.
🚨 Rule #2: check credit balance via response headers
Every Nansen response includes:
X-Nansen-Credits-Used: 5
X-Nansen-Credits-Remaining: 987
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 11d ago First seen · 168 lines · 195 tokens per session scan A 0877a02ed1c6
nansen is a skill published in the GitHub repository Vo1ganin/crypto-claude-skills (2 stars, last pushed 21d ago), licensed MIT. It adds 195 tokens to every session and 1,929 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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