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 holon-run/uxc --skill coinmarketcap-mcp-skillgit clone --depth 1 https://github.com/holon-run/uxcWrote 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/holon-run/uxc/coinmarketcap-mcp-skill)<a href="https://agentmods.dev/skills/holon-run/uxc/coinmarketcap-mcp-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/coinmarketcap-mcp-skill/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/holon-run/uxc/coinmarketcap-mcp-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/coinmarketcap-mcp-skill.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 | $0.00052 | $0.01153 |
| Opus 5 | $0.00026 | $0.00576 |
| Sonnet 5 | $0.00010 | $0.00231 |
| Haiku 4.5 | $0.00005 | $0.00115 |
Grade A, and why
coinmarketcap-mcp-skill 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 — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CoinMarketCap MCP Skill
Use this skill to run CoinMarketCap MCP operations through uxc.
Reuse the uxc skill for shared protocol discovery, output parsing, and generic auth/binding flows.
Prerequisites
uxcis installed and available inPATH.- Network access to
https://mcp.coinmarketcap.com/mcp. - A CoinMarketCap MCP API key is available.
Core Workflow
- Confirm endpoint and protocol with help-first probing:
uxc https://mcp.coinmarketcap.com/mcp -h- expected unauthenticated behavior today:
401 UnauthorizedwithToken not found
- Configure credential/binding for repeatable auth:
uxc auth credential set coinmarketcap-mcp --auth-type api_key --header "X-CMC-MCP-API-KEY={{secret}}" --secret-env COINMARKETCAP_MCP_API_KEYuxc auth credential set coinmarketcap-mcp --auth-type api_key --header "X-CMC-MCP-API-KEY={{secret}}" --secret-op op://Engineering/coinmarketcap/mcp-api-keyuxc auth binding add --id coinmarketcap-mcp --host mcp.coinmarketcap.com --path-prefix /mcp --scheme https --credential coinmarketcap-mcp --priority 100
- Use fixed link command by default:
command -v coinmarketcap-mcp-cli- If missing, create it:
uxc link coinmarketcap-mcp-cli https://mcp.coinmarketcap.com/mcp coinmarketcap-mcp-cli -h
- Inspect operation schema before execution:
coinmarketcap-mcp-cli get_crypto_quotes_latest -hcoinmarketcap-mcp-cli get_global_metrics_latest -hcoinmarketcap-mcp-cli trending_crypto_narratives -hcoinmarketcap-mcp-cli get_crypto_latest_news -h
- Prefer read-only discovery first, then expand into higher-cost or plan-gated endpoints.
Capability Map
- Market data and discovery:
get_crypto_quotes_latestsearch_cryptosget_crypto_info
- Technical analysis:
get_crypto_technical_analysisget_crypto_marketcap_technical_analysis
- On-chain and macro metrics:
get_crypto_metricsget_global_metrics_latestget_global_crypto_derivatives_metricsget_upcoming_macro_events
- Themes, news, and search:
trending_crypto_narrativesget_crypto_latest_newssearch_crypto_info
What ships with it
3 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.
- 12d ago First seen · 91 lines · 52 tokens per session scan A ee8ffd08333b
coinmarketcap-mcp-skill is a skill published in the GitHub repository holon-run/uxc (113 stars, last pushed yesterday), licensed MIT. It adds 52 tokens to every session and 1,153 once invoked, about $0.0003 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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