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 SpartanLabsXyz/simmer-sdk --skill nansen-copytrader-overlaygit clone --depth 1 https://github.com/SpartanLabsXyz/simmer-sdkWrote 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/spartanlabsxyz/simmer-sdk/nansen-copytrader-overlay)<a href="https://agentmods.dev/skills/spartanlabsxyz/simmer-sdk/nansen-copytrader-overlay"><img src="https://agentmods.dev/badge/skills/spartanlabsxyz/simmer-sdk/nansen-copytrader-overlay/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/spartanlabsxyz/simmer-sdk/nansen-copytrader-overlay"><img src="https://agentmods.dev/badge/skills/spartanlabsxyz/simmer-sdk/nansen-copytrader-overlay.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Data Exfiltration · line 59 Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 | $0.00092 | $0.02787 |
| Opus 5 | $0.00046 | $0.01393 |
| Sonnet 5 | $0.00018 | $0.00557 |
| Haiku 4.5 | $0.00009 | $0.00279 |
Grade A, and why
nansen-copytrader-overlay 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 12d 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 — 254 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Nansen Copytrader Overlay
Nansen is a data layer only in this skill: PM PnL quality overlay + address-summary/wallet quality. It is not smart-money-labeled copytrading — Nansen's smart-money labels are not Polymarket-specific, and no code path here calls the labels endpoint at all.
When to use this skill
Simmer is about to execute a copytrading rebalance into a specific
Polymarket market and has a candidate leader list (wallets + an existing
wallet_score). Use this skill to re-rank that list using Nansen's
Polymarket-specific PnL data before Simmer acts on it.
Do not use this skill to:
- Generate smart-money labels or entity classifications (out of scope — see framing above).
- Place trades. Every function and CLI command here is signal-only; the
caller (Simmer's execution wrapper) owns the actual
--livegate.
Core signal: pnl-by-market first
The primary ranking signal is pnl_by_market(market_id) — who is actually
profitable in the target market, not a wallet's broad trading history.
pnl_by_address / trades_by_address (broad history) and
address_summary (cheap wallet-quality pre-filter) are secondary —
they refine the market-specific score, they never replace it. A wallet
absent from the target market's leaderboard gets tagged
NOT_IN_MARKET_LEADERBOARD and keeps its original score with a small
discount, rather than a fabricated 50/50 blend against a signal that
doesn't exist.
Running it
python3 -m venv .venv && source .venv/bin/activate
pip install pytest # for tests only; the skill itself is stdlib-only
export NANSEN_API_KEY=... # your own Nansen key — sent as the `apiKey` header
No nansen CLI required: calls go straight to https://api.nansen.ai/api/v1
over HTTPS. Bring-your-own-key — every call spends your Nansen credits,
so --max-wallets (default 30) and --max-credits (default 45) are
deliberately conservative.
Getting a Nansen key
Sign up at nsn.ai/simmer, then copy your key from the Nansen dashboard. Signing up through that link gets you the Simmer partner discount on your subscription and API credits.
What ships with it
16 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.
- clawhub.json 1.3 KB
- DISCLAIMER.md 2.3 KB
- nansen_adapter.py 34 KB runs code
- nansen_copytrader_overlay_general.py 27 KB runs code
- nansen_copytrader_overlay_worldcup.py 16 KB runs code
- nansen_live_insider_scan.py 21 KB runs code
- nansen_skill_cli.py 7.1 KB runs code
- scripts/smoke_test.py 4.9 KB runs code
- tests/fixtures/historical_balances_new_wallet.json 112 B
- tests/fixtures/pnl_by_address.json 928 B
- tests/fixtures/trades_by_address.json 902 B
- tests/fixtures/trades_by_market_live.json 1.3 KB
- tests/test_live_insider_scan.py 13 KB runs code
- tests/test_nansen_adapter.py 24 KB runs code
- tests/test_overlay_general.py 19 KB runs code
- tests/test_overlay_worldcup.py 9.0 KB runs code
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.
- 12d ago First seen · 254 lines · 92 tokens per session scan A 29a5523950b6
nansen-copytrader-overlay is a skill published in the GitHub repository SpartanLabsXyz/simmer-sdk (48 stars, last pushed today), licensed MIT. It adds 92 tokens to every session and 2,787 once invoked, about $0.0005 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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