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 nansen-ai/nansen-cli --skill nansen-agent-guidegit clone --depth 1 https://github.com/nansen-ai/nansen-cliWrote 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/nansen-ai/nansen-cli/nansen-agent-guide)<a href="https://agentmods.dev/skills/nansen-ai/nansen-cli/nansen-agent-guide"><img src="https://agentmods.dev/badge/skills/nansen-ai/nansen-cli/nansen-agent-guide/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/nansen-ai/nansen-cli/nansen-agent-guide"><img src="https://agentmods.dev/badge/skills/nansen-ai/nansen-cli/nansen-agent-guide.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00041 | $0.01305 |
| Opus 5.5 | $0.00016 | $0.00522 |
| Sonnet 5.5 | $0.00008 | $0.00261 |
| Haiku 4.5 | $0.00004 | $0.00130 |
Grade A, and why
nansen-agent-guide 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 4d 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 — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Authentication
Nansen account API calls accept a selected nansen:api browser session or conventional API key with the same permissions. NANSEN_API_KEY takes precedence; optional primaryEnv preserves configured-key injection. Run nansen auth status for offline selection. Cached access expiry alone permits automatic renewal during an authorized task. Stop on anonymous selection, invalid state, blocked/uncertain renewal or actual auth failure; never drop a credential or fall back to anonymous x402 payment. Browser login does not grant wallet signing, privileged service identity or a persistent MCP integration key. Preserve all confirmation, signing, sanctions and geographic checks below. Browser login is available in CLI 2.0.0 within the macOS arm64 preview scope.
Agent vs CLI Routing
Public agent fast/expert and direct API commands accept the selected nansen:api browser session or conventional API key under the same account permissions.
| Need a... | Use |
|---|---|
| take (analysis, interpretation) | nansen agent |
| table (raw data, specific metrics) | Direct CLI commands |
| report (both) | Agent for narrative + CLI for data |
Use nansen agent when
- Question requires interpretation or synthesis across multiple data sources
- Open-ended research: "analyse this wallet", "what's happening with ETH smart money?"
nansen agent "What are top smart money tokens on Solana today and why?"
nansen agent "Analyse wallet 0x123... -- is this a smart trader?"
nansen agent "..." --expert # deeper analysis, 750 credits
Cost: 200 credits (fast) / 750 credits (expert)
Use direct CLI commands when
- You need specific structured data -- prices, volumes, holders, flows
- Deterministic question: "top 10 tokens by netflow on ethereum"
- Piping output or building a data table
nansen research token screener --chain ethereum --smart-money --limit 10
nansen research smart-money netflow --chain solana
nansen research profiler balance --address 0x123... --chain ethereum
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.
- 4d ago Changed · +7 lines c67da00c9440
- 5d ago Changed · +30 lines e8bf835bff9c
- 23d ago Changed c4ab6c347d44
- 27d ago Changed · +11 lines c16e9ecc9a4f
- 1mo ago First seen · 59 lines · 41 tokens per session scan A abbfdb6d49c8
nansen-agent-guide is a skill published in the GitHub repository nansen-ai/nansen-cli (139 stars, last pushed today), licensed MIT. It adds 41 tokens to every session and 1,305 once invoked, about $0.0002 per session on Opus 5.5. 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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