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/imoonkey/openweb/coinmarketcapnpx skills add imoonkey/openweb --skill coinmarketcapgit clone --depth 1 https://github.com/imoonkey/openwebWrote 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/imoonkey/openweb/coinmarketcap)<a href="https://agentmods.dev/skills/imoonkey/openweb/coinmarketcap"><img src="https://agentmods.dev/badge/skills/imoonkey/openweb/coinmarketcap.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.00440 |
| Opus 5 | $0.00000 | $0.00220 |
| Sonnet 5 | $0.00000 | $0.00088 |
| Haiku 4.5 | $0.00000 | $0.00044 |
Grade A, and why
coinmarketcap 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.
What it actually says
CoinMarketCap
Overview
Cryptocurrency market data and rankings. Real-time prices, market caps, volumes, and trending tokens from CoinMarketCap's internal data API.
Workflows
Browse top cryptocurrencies
getListings(limit)→id, name, symbol, quotes[].price, cmcRankgetQuote(id)→ statistics.price, marketCap, volume24h, description
Check a specific coin's market data
getListings(sortBy: "name")→idgetQuote(id)→ price, market cap, supply, ATH/ATL, percent changes
Discover trending coins
getTrending(limit)→cryptoId, tokenName, priceUsdgetQuote(id=cryptoId)→ full details for a trending coin
Operations
| Operation | Intent | Key Input | Key Output | Notes |
|---|---|---|---|---|
| getListings | top coins by market cap | start, limit, sortBy | cryptoCurrencyList[].name, symbol, quotes[].price, marketCap, cmcRank | paginated, default sort: market_cap desc |
| getQuote | coin price/market data | id <- getListings / getTrending.cryptoId | statistics.price, marketCap, volume24h, rank, ATH/ATL, description | numeric ID required (1=BTC, 1027=ETH) |
| getTrending | trending/hot coins | start, limit | list[].tokenName, tokenSymbol, priceUsd, volume24h, pricePercentageChange24h | entry point for discovery |
Quick Start
# Get top 10 cryptocurrencies by market cap
openweb coinmarketcap exec getListings '{"limit":10}'
# Get Bitcoin details (id=1)
openweb coinmarketcap exec getQuote '{"id":1}'
# Get Ethereum details (id=1027)
openweb coinmarketcap exec getQuote '{"id":1027}'
# Get trending coins
openweb coinmarketcap exec getTrending '{"limit":10}'
What ships with it
8 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.
- 4d ago First seen · 43 lines · 0 tokens per session scan A f098d894c761
coinmarketcap is a skill published in the GitHub repository imoonkey/openweb (60 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 440 tokens. 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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