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 coinapi-openapi-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/coinapi-openapi-skill)<a href="https://agentmods.dev/skills/holon-run/uxc/coinapi-openapi-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/coinapi-openapi-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/coinapi-openapi-skill"><img src="https://agentmods.dev/badge/skills/holon-run/uxc/coinapi-openapi-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 | $0.00033 | $0.00953 |
| Opus 5.5 | $0.00013 | $0.00381 |
| Sonnet 5.5 | $0.00007 | $0.00191 |
| Haiku 4.5 | $0.00003 | $0.00095 |
Grade A, and why
coinapi-openapi-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 1mo 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 — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CoinAPI REST Skill
Use this skill to run CoinAPI REST market data operations through uxc + OpenAPI.
Reuse the uxc skill for shared execution, auth, and error-handling guidance.
Prerequisites
uxcis installed and available inPATH.- Network access to
https://rest.coinapi.io. - Access to the curated OpenAPI schema URL:
https://raw.githubusercontent.com/holon-run/uxc/main/skills/coinapi-openapi-skill/references/coinapi-market.openapi.json
- A CoinAPI key.
Scope
This skill covers a read-first market data surface:
- current exchange rates
- current quote snapshots
- latest OHLCV candles
- latest trades
- latest order books
This skill does not cover:
- FIX, WebSocket, or MCP transport surfaces
- write operations
- the broader CoinAPI catalog
Authentication
CoinAPI uses X-CoinAPI-Key header auth.
Configure one API-key credential and bind it to rest.coinapi.io:
uxc auth credential set coinapi \
--auth-type api_key \
--api-key-header X-CoinAPI-Key \
--secret-env COINAPI_KEY
uxc auth binding add \
--id coinapi \
--host rest.coinapi.io \
--scheme https \
--credential coinapi \
--priority 100
Validate the active mapping when auth looks wrong:
uxc auth binding match https://rest.coinapi.io
Core Workflow
-
Use the fixed link command by default:
command -v coinapi-openapi-cli- If missing, create it:
uxc link coinapi-openapi-cli https://rest.coinapi.io --schema-url https://raw.githubusercontent.com/holon-run/uxc/main/skills/coinapi-openapi-skill/references/coinapi-market.openapi.json coinapi-openapi-cli -h
-
Inspect operation schema first:
coinapi-openapi-cli get:/v1/exchangerate/{asset_id_base}/{asset_id_quote} -hcoinapi-openapi-cli get:/v1/ohlcv/{symbol_id}/latest -hcoinapi-openapi-cli get:/v1/trades/{symbol_id}/latest -h
-
Prefer narrow spot and latest reads before broader crawls:
coinapi-openapi-cli get:/v1/exchangerate/{asset_id_base}/{asset_id_quote} asset_id_base=BTC asset_id_quote=USDcoinapi-openapi-cli get:/v1/quotes/current filter_symbol_id=BINANCE_SPOT_BTC_USDT
What ships with it
4 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.
- 1mo ago First seen · 104 lines · 33 tokens per session scan A e142a976e89c
coinapi-openapi-skill is a skill published in the GitHub repository holon-run/uxc (119 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 953 once invoked, about $0.0001 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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