yahoo-finance2
by gadicc
Unofficial API for Yahoo Finance with CLI, MCP and Agent Skill
765stars
105forks
HTML
Added 5/31/2026
Installation
# Add to your Claude Code skills
git clone https://github.com/gadicc/yahoo-finance2Getting Started
Guides for using ai agents skills like yahoo-finance2.
- Caveman: Cut Claude Token Use by 65%How agent-side prompt compression works, when to use it, and when not to.
- What is an AI Skills Marketplace?Definitions, how marketplaces work, and how to choose between them in 2026.
- Getting Started with AI SkillsFirst-time install walkthrough for Claude Code, Codex CLI, and ChatGPT.
Security ReportVerified
Last scanned: 5/31/2026
{
"issues": [],
"status": "PASSED",
"scannedAt": "2026-05-31T07:45:42.320Z",
"npmAuditRan": true,
"pipAuditRan": true
}yahoo-finance2
Unofficial API for Yahoo Finance with CLI, MCP and Agent Skill.
Copyright (c) 2021 by Gadi Cohen and Pilwon Huh. MIT licensed.
You are reading the docs for v4, the current major version published as
yahoo-finance2@latest. For the older v3 docs, click
here. Upgrading? See
UPGRADING.
Live Demo on CodeSandbox (Updated 2024-06-17; NextJS with both RSC and Hook-Relay examples)
NB: Recently the repo was renamed from node-yahoo-finance2 to
yahoo-finance2, and the following branches were named, master to main,
and devel to dev. See UPGRADING.md#dev for the
git commands to update your local installation.
Supported runtimes:
- Bun: v1+.
- Cloudflare: Modern releases, tested in CI via Workers Vitest under
nodejs_compat. - Deno: v2+.
- Node: v22+; v22 until 2027-04-30, v24 until 2028-04-30. Supported releases follow the Node.js release schedule.
Unofficial API
This project is neither created nor endorsed by Yahoo Inc. Yahoo does not provide any official API to developers, nor makes any guarantees regarding service availability or API consistency. In practice however, the open source community has kept this project (and it's predecessor) working well since 2013.
Nevertheless, we make no guarantees and you use this package at your own risk. The developers (and obviously Yahoo) cannot be held responsible for any losses you may incur as a result of using this service. Use of this package is considered acknowledgement and acceptance of these terms and of its license.
Quickstart
CLI (Command line interface)
$ npx yahoo-finance2 --help
$ npx yahoo-finance2 search AMZN
$ npx yahoo-finance2 quoteSummary GOOGL
$ npx yahoo-finance2 quoteSummary NVDA '{"modules":["assetProfile", "secFilings"]}'
# or install it
$ npm install -g yahoo-finance2
$ yahoo-finance search MSFT '{ "someOption": true }'
See the CLI docs for stdout/stderr behavior and exit codes.
See the MCP docs to expose yahoo-finance2 tools to MCP clients such as Codex, Claude, Cursor, and VS Code.
Importing
// or: const YahooFinance = require("yahoo-finance2").default;
import YahooFinance from "yahoo-finance2";
const yahooFinance = new YahooFinance();
const results = await yahooFinance.search("Apple");
const quote = await yahooFinance.quote('AAPL');
const { regularMarketPrice as price, currency } = quote;
Available modules:
chart,
fundamentalsTimeSeries,
historical,
insights,
options,
quote,
quoteSummary
(submodules: assetProfile, balanceSheetHistory, balanceSheetHistoryQuarterly,
calendarEvents, cashflowStatementHistory, cashflowStatementHistoryQuarterly,
defaultKeyStatistics, earnings, earningsHistory, earningsTrend, financialData,
fundOwnership, fundPerformance, fundProfile, incomeStatementHistory,
incomeStatementHistoryQuarterly, indexTrend, industryTrend, insiderHolders,
insiderTransactions, institutionOwnership, majorDirectHolders,
majorHoldersBreakdown, netSharePurchaseActivity, price, quoteType,
recommendationTrend, secFilings, sectorTrend, summaryDetail, summaryProfile,
symbol, topHoldings, upgradeDowngradeHistory),
recommendationsBySymbol,
screener,
search,
trendingSymbols.
Extras:
quoteCombine.
See the Explanatatory Documentation and Full API Documentation.
Particularly, make sure to read the notes there on ERROR HANDLING. Be aware that if a stock gets delisted, Yahoo removes all related data, including historical (and chart) data from periods before the delisting occurred (i.e. queries that worked before will start failing, and there is no way to retrieve this data again).
Agent Skill
This repo ships an Agent Skills-compatible skill at
skills/yahoo-finance2. Install it for
compatible agents with:
npx skills add gadicc/yahoo-finance2
The npm package also includes the skill under skills/yahoo-finance2 for tools
that sync skills from installed packages.
(Optional) TypeScript Love
Working with yahoo-finance2 is a joy if you're using TypeScript (but you don't
have to), with type checking and auto completion:
Try it yourself on our Live CodeSandbox.
Using in the Browser
It's not possible to run this in the browser, due to CORS and cookie issues. You should execute calls on a server or in a serverless or edge function, and pass this data to the browser as required. See the CodeSandbox above for examples. Use React Server Components, trpc, or other strategies to maintain types.
Related Projects
-
📈 Ghostfolio - mature, open-source Wealth Management & longtime supporter.
-
🛠️ StockQuotes.MCP - AI MCP Server to fetch real time financial data.
-
⚡ live-quotes - Demo to showcase running yahoo-finance2 in cloudflare workers with live quotes.
-
🦊 Foliofox - Open-source portfolio tracker with an AI financial advisor.
Want your project listed? Open a PR to add it here.
Contributing
Pull Requests welcome! Read CONTRIBUTING.md and join our list of heroes:
Credits
-
Massive thanks to @pilwon for the original node-yahoo-finance and for all our prior collaborations on this and other projects 🙏
-
Special mention goes out to pudgereyem and PythonCreator27 who made significant contributions in the very early days of this project.
Frequently Asked Questions
What is yahoo-finance2?
yahoo-finance2 is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by gadicc. Unofficial API for Yahoo Finance with CLI, MCP and Agent Skill. It has 765 GitHub stars.
Is yahoo-finance2 safe to use?
Yes. yahoo-finance2 passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.
How do I install yahoo-finance2?
Clone the repository with "git clone https://github.com/gadicc/yahoo-finance2" and add it to your Claude Code skills directory (see the Installation section above).
What programming language is yahoo-finance2 written in?
yahoo-finance2 is primarily written in HTML. It is open-source under gadicc on GitHub, so you can review or fork the full source.
Are there alternatives to yahoo-finance2?
Yes. SkillsLLM lists many other AI Agents skills you can browse and compare side by side. Open the AI Agents category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh yahoo-finance2 against similar tools.
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