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 OpenCMC/skills-for-ai-agents-by-CoinMarketCap --skill cmc-api-cryptogit clone --depth 1 https://github.com/OpenCMC/skills-for-ai-agents-by-CoinMarketCapWrote 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/opencmc/skills-for-ai-agents-by-coinmarketcap/cmc-api-crypto)<a href="https://agentmods.dev/skills/opencmc/skills-for-ai-agents-by-coinmarketcap/cmc-api-crypto"><img src="https://agentmods.dev/badge/skills/opencmc/skills-for-ai-agents-by-coinmarketcap/cmc-api-crypto/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/opencmc/skills-for-ai-agents-by-coinmarketcap/cmc-api-crypto"><img src="https://agentmods.dev/badge/skills/opencmc/skills-for-ai-agents-by-coinmarketcap/cmc-api-crypto.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 | $0.00105 | $0.01746 |
| Opus 5.5 | $0.00042 | $0.00698 |
| Sonnet 5.5 | $0.00021 | $0.00349 |
| Haiku 4.5 | $0.00011 | $0.00175 |
Grade A, and why
cmc-api-crypto 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 3d 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.
curl -X GET "https://pro-api.coinmarketcap.com/v3/cryptocurrency/listings/latest" \ How it starts
The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CoinMarketCap Cryptocurrency API
This skill covers the CoinMarketCap Cryptocurrency API endpoints for retrieving price data, market listings, historical quotes, trending coins, and token metadata.
Authentication
All requests require an API key in the header.
curl -X GET "https://pro-api.coinmarketcap.com/v3/cryptocurrency/listings/latest" \
-H "X-CMC_PRO_API_KEY: your-api-key"
Get your API key at: https://pro.coinmarketcap.com/login
Base URL
https://pro-api.coinmarketcap.com
Common Use Cases
See use-cases.md for goal-based guidance on which endpoint to use:
- Get current price of a token
- Find a token's CMC ID from symbol or name
- Get a token by contract address
- Get top 100 coins by market cap
- Find coins in a price range
- Get historical price at a specific date
- Build a price chart (OHLCV data)
- Find where a coin trades
- Get all-time high and distance from ATH
- Find today's biggest gainers
- Discover newly listed coins
- Get all tokens in a category (e.g., DeFi)
API Overview
| Endpoint | Description | Reference |
|---|---|---|
| GET /v1/cryptocurrency/categories | List all categories with market metrics | categories.md |
| GET /v1/cryptocurrency/category | Single category details | categories.md |
| GET /v1/cryptocurrency/listings/historical | Historical listings snapshot | listings.md |
| GET /v3/cryptocurrency/listings/latest | Current listings with market data | listings.md |
| GET /v1/cryptocurrency/listings/new | Newly added cryptocurrencies | listings.md |
| GET /v1/cryptocurrency/map | Map names/symbols to CMC IDs | map.md |
| GET /v1/cryptocurrency/trending/gainers-losers | Top gainers and losers | trending.md |
| GET /v1/cryptocurrency/trending/latest | Currently trending coins | trending.md |
| GET /v1/cryptocurrency/trending/most-visited | Most visited on CMC | trending.md |
| GET /v2/cryptocurrency/info | Static metadata (logo, description, URLs) | info.md |
| GET /v2/cryptocurrency/market-pairs/latest | Trading pairs for a coin | market-pairs.md |
| GET /v2/cryptocurrency/ohlcv/historical | Historical OHLCV candles | ohlcv.md |
| GET /v2/cryptocurrency/ohlcv/latest | Latest OHLCV data | ohlcv.md |
| GET /v2/cryptocurrency/price-performance-stats/latest | Price performance stats | price-performance.md |
| GET /v3/cryptocurrency/quotes/latest | Latest price quotes | quotes.md |
| GET /v3/cryptocurrency/quotes/historical | Historical price quotes | quotes.md |
What ships with it
10 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.
- references/categories.md 4.6 KB
- references/info.md 6.7 KB
- references/listings.md 9.6 KB
- references/map.md 4.0 KB
- references/market-pairs.md 6.5 KB
- references/ohlcv.md 7.2 KB
- references/price-performance.md 7.5 KB
- references/quotes.md 11 KB
- references/trending.md 9.9 KB
- references/use-cases.md 9.5 KB
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.
- 3d ago Changed · +4 lines 2071643cc53e
- 1mo ago First seen · 170 lines · 105 tokens per session scan A e0875a8044f4
cmc-api-crypto is a skill published in the GitHub repository OpenCMC/skills-for-ai-agents-by-CoinMarketCap (75 stars, last pushed 4d ago), licensed MIT. It adds 105 tokens to every session and 1,746 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-08-30.
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