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 MarieLynneBlock/arcanum-artifex --skill alpha-vantagegit clone --depth 1 https://github.com/MarieLynneBlock/arcanum-artifexWrote 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/marielynneblock/arcanum-artifex/alpha-vantage)<a href="https://agentmods.dev/skills/marielynneblock/arcanum-artifex/alpha-vantage"><img src="https://agentmods.dev/badge/skills/marielynneblock/arcanum-artifex/alpha-vantage/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/marielynneblock/arcanum-artifex/alpha-vantage"><img src="https://agentmods.dev/badge/skills/marielynneblock/arcanum-artifex/alpha-vantage.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 | $0.00126 | $0.01592 |
| Opus 5 | $0.00063 | $0.00796 |
| Sonnet 5 | $0.00025 | $0.00318 |
| Haiku 4.5 | $0.00013 | $0.00159 |
Grade A, and why
alpha-vantage 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 9d 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.
response = requests.get(BASE_URL, params={"function": function, "apikey": API_KEY, **params}) The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 9d ago First seen · 143 lines · 126 tokens per session scan A 2a29f049bbd5
alpha-vantage is a skill published in the GitHub repository MarieLynneBlock/arcanum-artifex (4 stars, last pushed 7d ago), with no licence file. It adds 126 tokens to every session and 1,592 once invoked, about $0.0006 per session on Opus 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 2026-09-03.
Other skills, from other repositories
compliance-frameworks
Swiss financial regulatory compliance — FINMA, GwG/AML/KYC, FIDLEG/FINIG licensing, BankG, crypto/DLT regulation, cross-border obligations (AEOI/CRS, FATCA). Trigger when: user asks about FINMA licensing, AML/KYC compliance, financial services cross-border, crypto regulation, or fintech data processing. Do NOT trigger…
agent-agentic-payments
Agent skill for agentic-payments - invoke with $agent-agentic-payments.
agent-payments
Agent skill for payments - invoke with $agent-payments.
travel-expense-audit
A travel-expense review workflow that checks reimbursement claims against policy handbooks and rate tables. It covers items such as hotel, transport, and daily meal allowances.
azure-cost-optimization
ANALYSIS SKILL — Identify cost savings across Azure subscriptions via cost + utilization analysis. WHEN: "optimize Azure costs", "reduce Azure spending", "find cost savings", "rightsize VMs", "find orphaned resources", "optimize Redis costs". DO NOT USE FOR: deploying (azure-deploy), general diagnostics…
azure-cost-management-api
In PowerShell, inline JSON for Cost Management API causes "Unsupported Media Type" errors.