Yahoo Finance API in 2026: official status and options

Is there an official Yahoo Finance API?

No. Yahoo’s developer API page lists two products: the Yahoo Fantasy Sports API and Sign in with Yahoo. There is no market data API on it.

Yahoo’s Terms of Service also forbid accessing or collecting data from its services "using any automated means", including scrapers and data mining tools, "without our express, prior permission." Building a product on Yahoo Finance pages carries that risk.

What is yfinance, and can I build on it?

yfinance is a popular open-source Python library under the Apache 2.0 license. It downloads prices and fundamentals from the endpoints that Yahoo’s own web pages call.

Its README is direct about the limits. It says yfinance is not affiliated with, endorsed or vetted by Yahoo, is intended for research and educational purposes, and that "the Yahoo! finance API is intended for personal use only." It tells users to read Yahoo’s terms for their rights to the data.

Use it for a notebook or a personal script. Do not put it behind a paid product or a customer-facing agent. The endpoints are undocumented and can change without notice.

What are the licensed alternatives to Yahoo Finance data?

These vendors sell API access on published terms. Prices checked November 10, 2026.

• SEC EDGAR API guide

How do you get Yahoo-style stock data through Locus Pro?

Through Locus Pro, your agent gets Alpha Vantage quotes, price history and fundamentals at a fixed price per call. Alpha Vantage is a reviewed vendor. The agent pays from one prepaid balance with no Alpha Vantage key. The endpoints below come from the Locus catalog on November 10, 2026.

The catalog also lists Yahoo Finance endpoints. These are site APIs built over finance.yahoo.com by a third party. Locus flags that they can break when the site changes and that the site’s terms may restrict automated access. Given Yahoo’s terms, prefer Alpha Vantage.

• Financial data API

When does your own Alpha Vantage plan fit better?

When your own app makes the calls on a schedule. If you stay under 25 requests a day, Alpha Vantage’s free tier covers you.

If you poll many tickers all day, your own Alpha Vantage account and API key can cost less per call, and paid plans have no daily limit.

Locus fits an agent that pulls quotes now and then between other tasks, with no Alpha Vantage key to manage.

What should I check before choosing a stock data API?

The headline price hides the terms that matter.

• Real time or delayed: Financial Modeling Prep’s free Basic plan has no real-time data.
• History depth: FMP Basic and Starter go back 5 years. Premium goes back 30 or more.
• Display rights: FMP requires a separate agreement to show or redistribute its data.
• Rate limits: Alpha Vantage free is 25 requests a day, which a single dashboard can exhaust.
• Personal versus commercial: yfinance says Yahoo’s data is for personal use only.

Which Yahoo Finance API alternative should I choose?

Pick by who will see the data and how often you call.

• A personal notebook: yfinance, accepting that it can break.
• A small app with daily prices: Alpha Vantage or FMP free tiers.
• A product with steady polling: an Alpha Vantage or FMP paid plan.
• Company fundamentals from the source: SEC EDGAR, free.
• An agent that pulls a few quotes between other tasks: Locus Pro.