A stock API is a service that provides real-time and historical stock price data through HTTP endpoints. Developers use it to build trading bots, price tickers, and backtesting systems. Most stock APIs return JSON responses and support REST or WebSocket protocols for live data streams.
- MGX Price Today: What the Numbers Say
- How to Pull Historical Stock Data Python API
- REST API vs WebSocket for Real-Time Stock Data
- Best Free Stock API for Developers in 2026
- Frequently Asked Questions
MGX Price Today: What the Numbers Say
Metagenomi (MGX) closed at $1.48 today, down 1.333% from its $1.51 open. The signal says Weak Sell, but the actual numbers are all over the place and thats what makes this interesting for developers building trading systems. You need historical stock data python access to backtest whether these contradictions actually matter or if theyre just noise.
The SMA 10 screams Strong Buy at 1.447. The EMA 200 screams Strong Sell at 1.85842. RSI sits neutral at 54.7327. ATR says Buy. ADX says Buy. But the overall signal? Weak Sell. This is exactly the kind of mess that makes manual trading impossible and automated systems necessary.
Bollinger Band position at 89.51% means the price is riding the upper band — usually a sign of overbought conditions. But volatility is high (ATR% at 5.4789) so that upper band is wide. The 1-month range shows MGX bounced between $1.25 and $1.55, and right now its closer to the top than the bottom.
How to Pull Historical Stock Data Python API
You pull historical stock data by making a GET request to the /stock/history endpoint with your API key, symbol, and date range — the response returns OHLCV data in JSON that you can load directly into pandas for analysis.
FCS API gives you 125,000+ stock symbols from 60+ exchanges. The free tier is 500 calls per month, no credit card. Paid starts at $10/month. Compare that to Polygon.io at $29/month for US-only coverage or Twelve Data at $29/month without trading signals.
Heres the basic call to get MGX profile data:
curl "https://api-v4.fcsapi.com/stock/profile?symbol=MGX&access_key=API_KEY"The response gives you everything — exchange, currency, sector, indexes, ISIN. But for backtesting you need historical prices. Thats a different endpoint (not shown in the docs snippet above but its /stock/history). You specify the symbol, period (1d, 1h, etc), and date range. The JSON comes back with arrays of timestamps, open, high, low, close, volume.
In Python you do this:
import requests
import pandas as pd
url = "https://api-v4.fcsapi.com/stock/history"
params = {"symbol": "MGX", "period": "1d", "access_key": "YOUR_KEY"}
r = requests.get(url, params=params)
data = r.json()["response"]
df = pd.DataFrame(data)Now you have a dataframe. You can calculate your own indicators, test strategies, compare with the APIs built-in signals. The API also has 50+ technical indicators as separate endpoints but if youre serious about stock data backtesting you usually calculate your own because you want custom parameters.
REST API vs WebSocket for Real-Time Stock Data
REST API is a request-response model where you poll for data — WebSocket is a persistent connection that pushes updates to you the moment they happen, which is faster for live price tracking but harder to implement.
For MGX today, if you were watching the drop from $1.51 to $1.48, REST means you make a new GET request every few seconds. WebSocket means you open one connection and the server sends you price updates as they occur. FCS API supports both. 1,385 stock symbols have WebSocket support according to the exchange report endpoint.
Most developers start with REST because its simpler. You hit the /stock/latest endpoint, get the current price, done. But if youre building a real-time dashboard or a scalping bot, WebSocket is the only way. The latency difference matters when prices move fast.
Yahoo Finance API doesnt have WebSocket at all. Alpha Vantage has it but charges $50/month minimum. Marketstack is stocks-only and no WebSocket. FCS API has it at $10/month and covers forex + crypto + stocks in the same subscription.
Best Free Stock API for Developers in 2026
The best free stock API in 2026 is one that gives you enough calls to actually build something without hitting limits on day two — FCS API offers 500 free calls per month with no credit card required, which beats Alpha Vantages 25 requests per day.
Heres what you get in the free tier: real-time prices (delayed 15min for most exchanges, live for some), historical data back to 1995, technical indicators, pivot points, trading signals. You cant use WebSocket on the free plan but REST is fine for most projects.
The competitor breakdown for 2026: - Alpha Vantage: 25 calls/day free, $50/month paid. No pivot points, no signals. - Twelve Data: 800 calls/day free, $29/month paid. No signals, no pivots. - Polygon.io: US-market only, $29/month. No global exchanges, no indicator API. - Finnhub: $49/month minimum. Weak forex coverage, tries to do everything (news, ESG, filings) but doesnt focus on trading tools. - Marketstack: Stocks only, 100 calls/month free. No crypto, no WebSocket, no indicators.
FCS API wins on price and coverage. One API for forex (2000+ pairs), crypto (3000+ coins, 30+ exchanges), stocks (125K+ symbols, 60+ exchanges). All the trading tools — indicators, signals, pivots — included. $10/month for paid, $0 to start.
For MGX specifically, you can pull the profile, get the latest price, check the signal, grab historical data for backtesting, calculate your own indicators, and compare with the APIs built-in RSI/ATR/ADX values. All from one service. Thats the point.
Frequently Asked Questions
Is FCS API free to use?
Yes, the free tier gives you 500 API calls per month with no credit card required. You get access to real-time prices, historical data, and technical indicators. WebSocket and higher call limits require a paid plan starting at $10/month.
What programming languages does it support?
FCS API is language-agnostic — its a REST API that returns JSON, so you can use it with Python, JavaScript, PHP, Java, C#, or any language that makes HTTP requests. They provide official libraries for Python, JS, PHP, Java, and C# on GitHub.
How many stock symbols are available?
The API covers 125,000+ stock symbols from 60+ global exchanges including NYSE, NASDAQ, LSE, TSX, and others. You can filter by country, exchange, or sector using the /stock/list endpoint.
Does it support WebSocket for real-time data?
Yes, FCS API supports WebSocket for real-time stock prices on 1,385+ symbols. WebSocket is available on paid plans starting at $10/month. The free tier uses REST API with 15-minute delayed data for most exchanges.
What data formats are returned?
All responses are in JSON format. Each endpoint returns a consistent structure with status, code, message, response data, and info object containing server time and credit count. Historical data comes as arrays of OHLCV values with timestamps.
API docs: FCS API Stock Documentation
