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Making Your First API Call

This guide demonstrates how to interact with Fonrex using REST HTTP endpoints and real-time WebSockets.

1. Get EOD Price History​

Retrieve End-of-Day (EOD) OHLCV historical prices for Airbus SE (AIR.PA).

cURL​

curl -s "http://localhost:5000/eod/AIR.PA?resolution=d&limit=5"

Python​

import requests

url = "http://localhost:5000/eod/AIR.PA"
params = {"resolution": "d", "limit": 5}
response = requests.get(url, params=params)

data = response.json()
print(f"Ticker: {data['symbol']}, Total Candles: {len(data['data'])}")
for bar in data['data']:
    print(f"Date: {bar['time']} | Close: {bar['close']} {data['currency']}")

Sample Response​

{
  "symbol": "AIR.PA",
  "name": "Airbus SE",
  "currency": "EUR",
  "resolution": "d",
  "count": 5,
  "data": [
    {
      "time": "2026-08-07T00:00:00Z",
      "open": 134.20,
      "high": 136.50,
      "low": 133.80,
      "close": 135.90,
      "adj_close": 135.90,
      "volume": 1245000
    }
  ]
}

2. Compute Technical Indicators​

Calculate a 14-period RSI (Relative Strength Index) for Apple Inc. (AAPL).

cURL​

curl -s "http://localhost:5000/technical/AAPL?indicator=rsi&period=14"

Python​

import requests

resp = requests.get("http://localhost:5000/technical/AAPL", params={"indicator": "rsi", "period": 14})
rsi_data = resp.json()
latest_rsi = rsi_data["values"][-1]
print(f"AAPL Current RSI(14): {latest_rsi['value']:.2f}")

3. Connect to Realtime WebSocket Stream​

Subscribe to live 1-minute candle ticks for Tesla (TSLA).

JavaScript Browser / Node.js​

const ws = new WebSocket("ws://localhost:5000/ws/realtime/TSLA");

ws.onopen = () => {
  console.log("Connected to Fonrex Realtime Stream for TSLA");
};

ws.onmessage = (event) => {
  const message = JSON.parse(event.data);
  console.log("Stream Event:", message.type, message.data);
};

Python WebSocket Client​

import asyncio
import websockets
import json

async def stream_quote():
    async with websockets.connect("ws://localhost:5000/ws/realtime/TSLA") as websocket:
        while True:
            msg = await websocket.recv()
            data = json.loads(msg)
            print(f"[{data['type']}] Close: {data['data'].get('close')} Volume: {data['data'].get('volume')}")

asyncio.run(stream_quote())