Individual skill

yfinance

yfinance global market data interface — retrieve OHLCV and research data for US, HK, and Canadian stocks, ETFs, and indices via Yahoo Finance. Free, no API key required.

agent/src/skills/yfinance/SKILL.md

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Repository stars (not skill ratings): 38,048
Repository last updated: Nov 10, 2026
License: MIT

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backtesting Repository topic
multi-agent Repository topic
quantitative-finance Repository topic
trading Repository topic
ai-agent Repository topic
algorithmic-trading Repository topic
fintech Repository topic
llm Repository topic
mcp Repository topic
python Repository topic
finance Derived category
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SKILL.mdcore · 9,012 bytes
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references/tool_get_options_chain.mddoc · 2,826 bytes
references/tool_get_stock_profile.mddoc · 3,471 bytes
references/yahoo_client_get_chart.mddoc · 2,961 bytes
references/yahoo_client_get_options.mddoc · 2,896 bytes
references/yahoo_client_get_quote_summary.mddoc · 3,326 bytes
references/yahoo_client_search.mddoc · 1,659 bytes

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# yfinance

## Overview

yfinance is an open-source Python wrapper for Yahoo Finance, providing global market data (US, HK, and Canadian stocks, ETFs, indices) including historical and real-time quotes. **Completely free, no registration or API key required.**

The project has a built-in yfinance DataLoader (`backtest/loaders/yfinance_loader.py`). When backtesting, set `source: "yfinance"` or `source: "auto"` to invoke it automatically.

For OHLCV bars in agent/swarm work, prefer the `get_market_data` tool when it is available. It routes through the project loader layer, normalizes symbols, removes malformed OHLC rows, and returns strict JSON. Use direct `yfinance` calls mainly for data outside OHLCV coverage such as company info, financial statements, options, holders, and insider transactions.

## Deep Yahoo Interfaces (references/)

Beyond the `yfinance` package, the project ships a built-in **Yahoo public-API
client** (`backtest.loaders.yahoo_client`) and two read-only agent tools that
sit on top of it. These reach Yahoo's own unauthenticated JSON endpoints