Yahoo Finance data for production apps

yfin

An extremely fast Yahoo Finance API for builders and their agents: 45+ endpoints, OpenAPI, Python, TypeScript, REST, and yfinance-compatible calls.

Start in 2 minutes API Reference
40 req/sAnonymous public API access
200 req/sWith a contact identity
45+Yahoo Finance API contracts
3 waysPython, TypeScript, or REST

Use yfin from the runtime you already have.

Start with the yfinance-shaped Python SDK, use the TypeScript SDK in apps and agents, or call the hosted REST API from any language.

Python

Download the Python SDK

Drop into yfinance-style code or use the low-level hosted API client.

pip install yfin TypeScript

Download the TypeScript SDK

Use yfin from Node, browsers, Workers, Bun, Deno, and agent runtimes.

npm install @yfin/sdk REST

Call the hosted API

Fetch quotes, history, options, fundamentals, screeners, and market summaries.

https://api.yfin.dev Docs

Read the docs

Guides, concepts, rate limits, error shapes, OpenAPI, and migration notes.

docs.yfin.dev

yfinance-compatible where it matters. A real API where it counts.

yfinance is great for local notebooks. yfin keeps the familiar Python shape and adds the hosted API surface teams and agents need.

Area yfin yfinance
Best fit Apps, services, agents, jobs, dashboards Local notebooks and scripts
Public REST API Hosted API with stable URLs No hosted REST API
Free public limits 40 req/s anonymous, 200 req/s with contact No managed API tier
SDKs Python + TypeScript/JavaScript Python
AI and tool use OpenAPI, docs, stable HTTP routes Requires Python execution or a custom wrapper
Migration Use import yfin as yf Already yfinance

One market-data surface, three entry points.

Use the SDK when it fits. Use REST when you want the same data from another language, service, or agent. 

import yfin as yf

ticker = yf.Ticker("AAPL", contact="you@example.com")
print(ticker.history(period="5d", interval="1d"))
print(ticker.fast_info)
import { Client } from "@yfin/sdk";

const yfin = new Client({ contact: "you@example.com" });
const quote = await yfin.quote(["AAPL", "MSFT"]);
console.log(quote.data);

No signup. Install yfin and go.

Start free, add a contact identity when your app needs more room, and move to an API key when your workload grows.

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