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 jamespud/yahoo-stock-mcp --skill options-analysisgit clone --depth 1 https://github.com/jamespud/yahoo-stock-mcpWrote 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/jamespud/yahoo-stock-mcp/options-analysis)<a href="https://agentmods.dev/skills/jamespud/yahoo-stock-mcp/options-analysis"><img src="https://agentmods.dev/badge/skills/jamespud/yahoo-stock-mcp/options-analysis/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/jamespud/yahoo-stock-mcp/options-analysis"><img src="https://agentmods.dev/badge/skills/jamespud/yahoo-stock-mcp/options-analysis.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 | $0.00078 | $0.01187 |
| Opus 5.5 | $0.00031 | $0.00475 |
| Sonnet 5.5 | $0.00016 | $0.00237 |
| Haiku 4.5 | $0.00008 | $0.00119 |
Grade A, and why
options-analysis 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 5d 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 — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Options analysis
Read a chain contract by contract, screen it for liquidity, and - when the question needs more than one expiry - assemble the term structure from separate live calls.
Read references/data-policy.md first, then the chain playbook for the sequence, the scales, and the reporting shape.
MCP tools used
get_option_quote- live Yahoo chain for one expiry: underlying quote, available expirations and strikes, per-contract quotesget_options- the stored chain snapshot in SQLite, optionally filtered to one expirationget_quote- the stored underlying price and its date, for a same-source comparison with the snapshotsync_stock- refreshes the stored chain snapshot (optionscomponent)get_bars- underlying price history, when a strike or IV reading needs a recent range
Workflow
- Decide which source answers the question. A current chain, a specific expiry, or anything
about IV belongs to
get_option_quote(live, no database needed). A reproducible, dated snapshot- or a symbol whose live fetch is failing - belongs to
get_options.
- or a symbol whose live fetch is failing - belongs to
- Get the expiration list before asking for legs.
get_option_quotereturnsexpirationsand thestrikesavailable for the expiry it returned;get_optionsreturnsexpirationspresent in the snapshot. Choose from that list rather than assuming standard monthlies. - Pull one expiry at a time. Both tools return a single expiry's legs per call (the nearest by
default). For a term structure you must call
get_option_quoteonce per expiration - bound how many you request to the question. - Filter, then check you still have both sides. Pass
typeandstriketo narrow, and keeplimitgenerous: the limit is applied by slicing after the filters, and the legs are ordered calls-then-puts, so a small limit silently drops the entire put side. - Screen for liquidity before quoting prices. Bid, ask, volume and open interest decide whether a quote means anything. Report zero-bid and empty-volume legs as such rather than quoting a mid.
- Report with the as-of and the source. Live chains carry an
asOftimestamp and the underlying'smarketState; the stored snapshot carries per-legupdated_at. Say which one every number came from.
What ships with it
2 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.
- 5d ago Changed 4d23a9b3ee96
- 13d ago Changed 46dc6f37797e
- 17d ago First seen · 74 lines · 78 tokens per session scan A 236f27c162e1
options-analysis is a skill published in the GitHub repository jamespud/yahoo-stock-mcp (0 stars, last pushed 5d ago), licensed MIT. It adds 78 tokens to every session and 1,187 once invoked, about $0.0003 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 2026-09-28.
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