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stocks

This Claude Code skill retrieves read-only market data from Yahoo Finance using five commands: quote for current prices, search to find tickers by company name, history for daily OHLCV data over configurable date ranges, compare for side-by-side ticker analysis, and crypto for cryptocurrency prices. Use it when users request stock quotes, historical performance data, ticker lookups, or price comparisons without requiring trading capabilities or external API keys.

View source Repository: hermes-agent

Install in Claude Code

Copy

git clone --depth 1 https://github.com/NousResearch/hermes-agent /tmp/stocks && cp -r /tmp/stocks/optional-skills/finance/stocks ~/.claude/skills/stocks

Then start a new Claude Code session; the skill loads automatically.

Definition

SKILL.md

# Stocks Skill

Read-only market data via Yahoo Finance. Five commands: `quote`, `search`,
`history`, `compare`, `crypto`. Python stdlib only — no API key, no pip
installs. Yahoo's endpoint is unofficial and may rate-limit or change.

## When to Use

- User asks for a current stock price (AAPL, TSLA, MSFT, ...)
- User wants to look up a ticker by company name
- User wants OHLCV history or performance over a date range
- User wants to compare several tickers side by side
- User asks for a crypto price (BTC, ETH, SOL, ...)

## Prerequisites

Python 3.8+ stdlib only. Optional: set `ALPHA_VANTAGE_KEY` to enrich
`market_cap`, `pe_ratio`, and 52-week levels when Yahoo's crumb-protected
fields come back null. Free key: https://www.alphavantage.co/support/#api-key

## How to Run

Invoke through the `terminal` tool. Once installed:

```
SCRIPT=~/.hermes/skills/finance/stocks/scripts/stocks_client.py
python $SCRIPT quote AAPL
```

All output is JSON on stdout — pipe through `jq` if you want to slice it.

## Quick Reference

```
python $SCRIPT quote AAPL
python $SCRIPT quote AAPL MSFT GOOGL TSLA
python $SCRIPT search "Tesla"
python $SCRIPT history NVDA --range 6mo
python $SCRIPT compare AAPL MSFT GOOGL
python $SCRIPT crypto BTC ETH SOL
```

## Commands

### `quote SYMBOL [SYMBOL2 ...]`

Current price, change, change%, volume, 52-week high/low.

### `search QUERY`

Find tickers by company name. Returns top 5: symbol, name, exchange, type.

### `history SYMBOL [--range RANGE]`

Daily OHLCV plus stats (min, max, avg, total return %). Ranges: `1mo`,
`3mo`, `6mo`, `1y`, `5y`. Default: `1mo`.

### `compare SYMBOL1 SYMBOL2 [...]`

Side-by-side: price, change%, 52-week performance.

### `crypto SYMBOL [SYMBOL2 ...]`

Crypto prices. Pass `BTC` (the script appends `-USD` automatically).

## Pitfalls

- Yahoo Finance's API is unofficial. Endpoints can change or rate-limit
  without notice — if requests start failing, that's why.
- `market_cap` and `pe_ratio` may return null on `quote` when Yahoo's
  crumb session isn't established. Set `ALPHA_VANTAGE_KEY` to backfill.
- Add a small delay between bulk requests to avoid rate-limiting.
- This is read-only — no order placement, no account integration.

## Verification

```
python ~/.hermes/skills/finance/stocks/scripts/stocks_client.py quote AAPL
```

Returns a JSON object with `symbol: "AAPL"` and a numeric `price` field.