Finnhub - Free stock API for realtime market data, global company fundamentals, economic data, and alternative data.

The Finnhub API is an institutional-grade financial data platform designed for developers, fintech startups, investment firms, and individual traders across the United States. Built by ex-engineers from Google, Bloomberg, and Tradeweb, Finnhub ...

UI for finnhub.io live trades websocket API, written in Rust, compiled to WASM - lloydmeta/finnhub-ws-rs

October 13, 2025 - ... GitHub - Finnhub-Stock-API/finnhub-python: Finnhub Python API Client. Finnhub API provides institutional-grade financial data to investors, fintech startups and investment firms.

finnhub.WebSocket.OnTradeReceived += (sender, trade) => { Console.WriteLine($"{trade.Symbol}: ${trade.Price} x {trade.Volume}"); }; await finnhub.WebSocket.ConnectAsync(); await finnhub.WebSocket.SubscribeAsync("AAPL", "MSFT", "GOOGL"); Ready-to-run sample applications are available in the samples/ directory: ... # Set your API key export FINNHUB_API_KEY=your-api-key # Linux/macOS set FINNHUB_API_KEY=your-api-key # Windows # Run REST sample dotnet run --project samples/FinnhubSdk.Samples.Rest # Run WebSocket sample dotnet run --project samples/FinnhubSdk.Samples.WebSocket

February 22, 2026 - Finnhub is built by ex-engineers from Google, Bloomberg, and Tradeweb, and offers one of the best free tiers in financial data APIs — 60 API calls per minute at no cost. It covers real-time and historical stock data for 60+ global exchanges, ...

February 6, 2026 - A comprehensive Rust client for the Finnhub.io financial data API with 96% endpoint coverage, flexible rate limiting, and WebSocket support

March 14, 2023 - In addition, there’s a real-time newsfeed delivered over websockets. The free tier is quite generous and offers more than enough for doing proof of concept work and testing ideas. While you only get a year’s worth of historical data per API call on the free tier (more if you specify a lower resolution, like monthly), you can make up to 50 calls per minute. In this post, we’ll explore the finnhub.io free tier via its REST API.

Finnhub API provides Real-Time RESTful APIs and Websocket for Stocks, Currencies, and Crypto

April 16, 2026 - The Finnhub API provides Real-Time RESTful APIs and Websocket for Stocks, Currencies, and Crypto.

Does Finnhub have an official API? Yes — Finnhub provides an official public REST and WebSocket API covering quotes, fundamentals, news and sentiment.

Rate limiting implementation for the Finnhub API. ... WebSocket support for real-time data streaming.

October 28, 2021 - --- request header --- GET /?token=xxxxxxxxxxxxx HTTP/1.1 Upgrade: websocket Host: ws.finnhub.io Origin: http://ws.finnhub.io Sec-WebSocket-Key: xxxxxxxxxxxx Sec-WebSocket-Version: 13 Connection: Upgrade

The project is a streaming data pipeline based on Finnhub.io API/websocket real-time trading data created for a sake of my master's thesis related to stream processing.

December 30, 2022 - The easiest application to build is a simple Python application since finnhub includes the basics in their documentation. We are going to use their free WEBSOCKET interface to Trades so we can get real-time events as they happen.

from fhub import Session hub = Session("your_finnhub_api_key_here") # Download prices time serie of Tesla. tsla = hub.candle('TSLA') # Download prices for several tickers from a date. data = hub.candle(['AMZN', 'NFLX', 'DIS'], start="2018-01-01") # Download prices and bollinger bands indicator for several tickers. data = hub.indicator(['AAPL', 'MSFT'], start='2019-01-01', indicator='bbands', indicator_fields={'timeperiod': 10}) Real-time subscription via Finnhub's websocket is easy using fhub, even using custom functions for each tick received.

August 12, 2020 - const socket = new WebSocket('wss://ws.finnhub.io?token=mytoken'); // Connection opened -> Subscribe socket.addEventListener('open', function (event) { socket.send(JSON.stringify({'type':'subscribe', 'symbol': 'AAPL'})) socket.send(JSON.stringify({'type':'subscribe', 'symbol': 'BINANCE:BTCUSDT'})) socket.send(JSON.stringify({'type':'subscribe', 'symbol': 'IC MARKETS:1'})) }); // Listen for messages socket.addEventListener('message', function (event) { console.log('Message from server ', event.data); });

ws = websocket.WebSocketApp("wss://ws.finnhub.io?token=<my-finnhub-token>", on_message = on_message, on_error = on_error, on_close = on_close) ws.on_open = on_open ·

April 30, 2026 - In addition, there’s a real-time newsfeed delivered over websockets. The free tier is quite generous and offers more than enough for doing proof of concept work and testing ideas. While you only get a year’s worth of historical data per API call on the free tier (more if you specify a lower resolution, like monthly), you can make up to 50 calls per minute. In this post, we’ll explore the finnhub.io free tier via its REST API.

Data ingestion layer - A containerized Python application named producer connects to the Finnhub.io websocket.