FCSAPI - JavaScript & Node.js REST Client

JavaScript & Node.js REST API client library for Forex, Cryptocurrency, and Stock market data from FCS API.

Features

Forex API - 4000+ currency pairs, real-time rates, commodities, historical data, technical analysis
Crypto API - 50,000+ coins from major exchanges (Binance, Coinbase, etc.), market cap, rank, coin data
Stock API - 125,000+ global stocks, indices, earnings, financials, dividends
Multiple Auth Methods - Access Key, IP Whitelist, or Token-based authentication
Easy to Use - Simple async/await method calls for all API endpoints
Universal - Works in Browser and Node.js (18+)
No Dependencies - Pure JavaScript using native Fetch API

Installation

npm (Recommended)

npm install fcsapi-rest

// Node.js
const { FcsApi, FcsConfig, FCS_Forex, FCS_Crypto, FCS_Stock } = require('fcsapi-rest');

CDN

<!-- All modules -->
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FcsConfig.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FCS_Forex.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FCS_Crypto.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FCS_Stock.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FcsApi.js"></script>

<!-- OR load only what you need -->
<!-- Forex only -->
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FcsConfig.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FCS_Forex.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FcsApi.js"></script>

<!-- Crypto only -->
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FcsConfig.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FCS_Crypto.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FcsApi.js"></script>

<!-- Stock only -->
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FcsConfig.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FCS_Stock.js"></script>
<script src="https://cdn.jsdelivr.net/gh/fcsapi/rest-api-js/src/FcsApi.js"></script>

Local Files

<script src="src/FcsConfig.js"></script>
<script src="src/FCS_Forex.js"></script>
<script src="src/FcsApi.js"></script>

Quick Start

Step 1: Configure Authentication

Open src/FcsConfig.js and set your authentication method:

// Option 1: Access Key (default)
authMethod = 'access_key';
accessKey = 'YOUR_ACCESS_KEY_HERE';

// Option 2: IP Whitelist (no key needed)
authMethod = 'ip_whitelist';

// Option 3: Token-based (from your backend)
authMethod = 'token';
publicKey = 'YOUR_PUBLIC_KEY';
token = 'TOKEN_FROM_BACKEND';
tokenExpiry = 1735123456; // Unix timestamp

Step 2: Use in Your HTML

<script src="src/FcsConfig.js"></script>
<script src="src/FCS_Crypto.js"></script>
<script src="src/FCS_Forex.js"></script>
<script src="src/FCS_Stock.js"></script>
<script src="src/FcsApi.js"></script>
<script>
    // Uses settings from FcsConfig.js
    const fcsapi = new FcsApi();

    // Make API calls
    async function getData() {
        const forex = await fcsapi.forex.getLatestPrice('FX:EURUSD');
        console.log(forex);
    }

    getData();
</script>

Authentication Methods

Method 1: Access Key (Simple)

Set your API key in FcsConfig.js or pass directly:

// In FcsConfig.js
authMethod = 'access_key';
accessKey = 'YOUR_ACCESS_KEY';

// Or pass directly
const config = FcsConfig.withAccessKey('YOUR_ACCESS_KEY');
const fcsapi = new FcsApi(config);

// Or set after initialization
const fcsapi = new FcsApi();
fcsapi.setAccessKey('YOUR_ACCESS_KEY');

Method 2: IP Whitelist (No Key Needed)

If your IP is whitelisted in your FCS API dashboard:

// In FcsConfig.js
authMethod = 'ip_whitelist';

// Or use static method
const config = FcsConfig.withIpWhitelist();
const fcsapi = new FcsApi(config);

// Or set after initialization
const fcsapi = new FcsApi();
fcsapi.useIpWhitelist();

Method 3: Token-Based (Secure)

Token generated from your backend (PHP, Node.js, Python, etc.):

// Static method
const config = FcsConfig.withToken('PUBLIC_KEY', 'TOKEN', 1735123456);
const fcsapi = new FcsApi(config);

// Or set after initialization
const fcsapi = new FcsApi();
fcsapi.setToken({
    token: 'TOKEN_FROM_BACKEND',
    expiry: 1735123456,
    publicKey: 'YOUR_PUBLIC_KEY'
});

Token Expiry Options

Seconds	Duration
300	5 minutes
900	15 minutes
1800	30 minutes
3600	1 hour (default)
86400	24 hours

Check Token Validity

if (!fcsapi.isTokenValid()) {
    // Fetch new token from your backend
    await refreshToken();
}

API Reference

Forex API (FCS_Forex.js)

// Symbol List
await fcsapi.forex.getSymbolsList();                    // All symbols
await fcsapi.forex.getSymbolsList('forex', 'spot');     // Forex spot only

// Latest Prices
await fcsapi.forex.getLatestPrice('EURUSD');
await fcsapi.forex.getLatestPrice('FX:EURUSD,FX:GBPUSD');
await fcsapi.forex.getAllPrices('FX');

// Commodities
await fcsapi.forex.getCommodities();
await fcsapi.forex.getCommodities('XAUUSD');            // Gold
await fcsapi.forex.getCommoditySymbols();

// Currency Converter
await fcsapi.forex.convert('EUR', 'USD', 100);          // 100 EUR to USD

// Base Prices
await fcsapi.forex.getBasePrices('USD');

// Cross Rates
await fcsapi.forex.getCrossRates('USD', 'forex', '1D');

// Historical Data
await fcsapi.forex.getHistory('EURUSD', '1D', 100);
await fcsapi.forex.getHistory('EURUSD', '1h', 300, '2025-01-01', '2025-01-31');

// Profile
await fcsapi.forex.getProfile('EUR');

// Exchanges
await fcsapi.forex.getExchanges();

// Technical Analysis
await fcsapi.forex.getMovingAverages('EURUSD', '1D');
await fcsapi.forex.getIndicators('EURUSD', '1D');
await fcsapi.forex.getPivotPoints('EURUSD', '1D');

// Performance
await fcsapi.forex.getPerformance('EURUSD');

// Economy Calendar
await fcsapi.forex.getEconomyCalendar();
await fcsapi.forex.getEconomyCalendar('US', '2025-01-01', '2025-01-31');

// Top Movers
await fcsapi.forex.getTopGainers('forex', 20);
await fcsapi.forex.getTopLosers('forex', 20);
await fcsapi.forex.getMostActive('forex', 20);

// Search
await fcsapi.forex.search('EUR');

// Advanced Query
await fcsapi.forex.advanced({ type: 'forex', period: '1D', sort_by: 'active.chp_desc' });

Crypto API (FCS_Crypto.js)

// Symbol List
await fcsapi.crypto.getSymbolsList('crypto', 'spot', 'BINANCE');
await fcsapi.crypto.getCoinsList();

// Latest Prices
await fcsapi.crypto.getLatestPrice('BINANCE:BTCUSDT');
await fcsapi.crypto.getAllPrices('BINANCE');

// Coin Data (Market Cap, Rank, Supply)
await fcsapi.crypto.getCoinData();
await fcsapi.crypto.getCoinData('BTCUSD', 100, 'perf.rank_asc');
await fcsapi.crypto.getTopByMarketCap(100);
await fcsapi.crypto.getTopByRank(50);

// Crypto Converter
await fcsapi.crypto.convert('BTC', 'USD', 1);
await fcsapi.crypto.convert('ETH', 'BTC', 10);

// Base Prices
await fcsapi.crypto.getBasePrices('BTC');

// Cross Rates
await fcsapi.crypto.getCrossRates('USD', 'BINANCE', 'crypto', '1D');

// Historical Data
await fcsapi.crypto.getHistory('BINANCE:BTCUSDT', '1D', 100);

// Profile
await fcsapi.crypto.getProfile('BTC');

// Exchanges
await fcsapi.crypto.getExchanges();

// Technical Analysis
await fcsapi.crypto.getMovingAverages('BINANCE:BTCUSDT', '1D');
await fcsapi.crypto.getIndicators('BINANCE:BTCUSDT', '1D');
await fcsapi.crypto.getPivotPoints('BINANCE:BTCUSDT', '1D');

// Performance
await fcsapi.crypto.getPerformance('BINANCE:BTCUSDT');

// Top Movers
await fcsapi.crypto.getTopGainers('BINANCE', 20);
await fcsapi.crypto.getTopLosers('BINANCE', 20);
await fcsapi.crypto.getHighestVolume('BINANCE', 20);

// Search
await fcsapi.crypto.search('bitcoin');

// Advanced Query
await fcsapi.crypto.advanced({ type: 'crypto', exchange: 'BINANCE', sort_by: 'active.chp_desc' });

Stock API (FCS_Stock.js)

// Symbol List
await fcsapi.stock.getSymbolsList('NASDAQ');
await fcsapi.stock.getSymbolsList(null, 'united-states', 'technology');

// Search
await fcsapi.stock.search('Apple');

// Indices
await fcsapi.stock.getIndicesList('united-states');
await fcsapi.stock.getIndicesLatest('NASDAQ:NDX,SP:SPX');

// Latest Prices
await fcsapi.stock.getLatestPrice('NASDAQ:AAPL');
await fcsapi.stock.getAllPrices('NASDAQ');
await fcsapi.stock.getLatestByCountry('united-states', 'technology');
await fcsapi.stock.getLatestByIndices('NASDAQ:NDX');

// Historical Data
await fcsapi.stock.getHistory('NASDAQ:AAPL', '1D', 100);

// Profile
await fcsapi.stock.getProfile('AAPL');

// Exchanges
await fcsapi.stock.getExchanges();

// Financial Data
await fcsapi.stock.getEarnings('NASDAQ:AAPL', 'annual');
await fcsapi.stock.getRevenue('NASDAQ:AAPL');
await fcsapi.stock.getDividends('NASDAQ:AAPL');
await fcsapi.stock.getBalanceSheet('NASDAQ:AAPL', 'annual');
await fcsapi.stock.getIncomeStatements('NASDAQ:AAPL', 'annual');
await fcsapi.stock.getCashFlow('NASDAQ:AAPL', 'annual');
await fcsapi.stock.getStatistics('NASDAQ:AAPL');
await fcsapi.stock.getForecast('NASDAQ:AAPL');
await fcsapi.stock.getStockData('NASDAQ:AAPL', 'profile,earnings,dividends');

// Technical Analysis
await fcsapi.stock.getMovingAverages('NASDAQ:AAPL', '1D');
await fcsapi.stock.getIndicators('NASDAQ:AAPL', '1D');
await fcsapi.stock.getPivotPoints('NASDAQ:AAPL', '1D');

// Performance
await fcsapi.stock.getPerformance('NASDAQ:AAPL');

// Top Movers
await fcsapi.stock.getTopGainers('NASDAQ', 20);
await fcsapi.stock.getTopLosers('NASDAQ', 20);
await fcsapi.stock.getMostActive('NASDAQ', 20);

// Filter
await fcsapi.stock.getBySector('technology', 50);
await fcsapi.stock.getByCountry('united-states', 50);

// Advanced Query
await fcsapi.stock.advanced({ exchange: 'NASDAQ', sector: 'technology', sort_by: 'active.chp_desc' });

Response Handling

const response = await fcsapi.forex.getLatestPrice('EURUSD');

// Check if successful
if (fcsapi.isSuccess()) {
    const data = response.response;
    console.log(data);
} else {
    console.error('Error:', fcsapi.getError());
}

// Get last response
const lastResponse = fcsapi.getLastResponse();

// Get response data only
const data = fcsapi.getResponseData();

Time Periods

Period	Description
`1m`	1 minute
`5m`	5 minutes
`15m`	15 minutes
`30m`	30 minutes
`1h`	1 hour
`4h`	4 hours
`1D`	1 day
`1W`	1 week
`1M`	1 month

Complete Example

<!DOCTYPE html>
<html>
<head>
    <title>FCS API Example</title>
</head>
<body>
    <h1>Forex Rates</h1>
    <div id="result"></div>

    <script src="src/FcsConfig.js"></script>
    <script src="src/FCS_Crypto.js"></script>
    <script src="src/FCS_Forex.js"></script>
    <script src="src/FCS_Stock.js"></script>
    <script src="src/FcsApi.js"></script>
    <script>
        // Method 1: Uses settings from FcsConfig.js
        const fcsapi = new FcsApi();

        // Method 2: Pass config directly
        // const config = FcsConfig.withAccessKey('YOUR_KEY');
        // const fcsapi = new FcsApi(config);

        // Method 3: IP Whitelist
        // const config = FcsConfig.withIpWhitelist();
        // const fcsapi = new FcsApi(config);

        async function loadData() {
            const result = await fcsapi.forex.getLatestPrice('FX:EURUSD');

            if (fcsapi.isSuccess()) {
                const price = result.response[0].active.c;
                document.getElementById('result').innerHTML = 'EUR/USD: ' + price;
            } else {
                document.getElementById('result').innerHTML = 'Error: ' + fcsapi.getError();
            }
        }

        loadData();
    </script>
</body>
</html>

File Structure

rest-api-js/
├── src/
│   ├── FcsConfig.js        # Configuration (auth methods)
│   ├── FcsApi.js           # Main client (initializes modules)
│   ├── FCS_Crypto.js       # Crypto module
│   ├── FCS_Forex.js        # Forex module
│   └── FCS_Stock.js        # Stock module
├── examples/
│   ├── forex-example.html  # Forex demo
│   ├── crypto-example.html # Crypto demo
│   └── stock-example.html  # Stock demo
├── FUNCTIONS.md            # Functions reference
├── README.md               # This file
└── LICENSE                 # MIT License

Get API Key

Visit FCS API
Sign up for a free account
Get your API key and Public key from the dashboard

Documentation

For complete API documentation, visit:

Support

Email: support@fcsapi.com
Website: fcsapi.com

License

MIT License - see LICENSE file for details.

Name		Name	Last commit message	Last commit date
Latest commit History 4 Commits
examples		examples
src		src
token-generators		token-generators
.gitattributes		.gitattributes
.gitignore		.gitignore
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
FUNCTIONS.md		FUNCTIONS.md
LICENSE		LICENSE
README.md		README.md
SECURITY.md		SECURITY.md
index.js		index.js
package.json		package.json

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Repository files navigation

FCSAPI - JavaScript & Node.js REST Client

Features

Installation

npm (Recommended)

CDN

Local Files

Quick Start

Step 1: Configure Authentication

Step 2: Use in Your HTML

Authentication Methods

Method 1: Access Key (Simple)

Method 2: IP Whitelist (No Key Needed)

Method 3: Token-Based (Secure)

Token Expiry Options

Check Token Validity

API Reference

Forex API (FCS_Forex.js)

Crypto API (FCS_Crypto.js)

Stock API (FCS_Stock.js)

Response Handling

Time Periods

Complete Example

File Structure

Get API Key

Documentation

Support

License

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Repository files navigation

FCSAPI - JavaScript & Node.js REST Client

Features

Installation

npm (Recommended)

CDN

Local Files

Quick Start

Step 1: Configure Authentication

Step 2: Use in Your HTML

Authentication Methods

Method 1: Access Key (Simple)

Method 2: IP Whitelist (No Key Needed)

Method 3: Token-Based (Secure)

Token Expiry Options

Check Token Validity

API Reference

Forex API (FCS_Forex.js)

Crypto API (FCS_Crypto.js)

Stock API (FCS_Stock.js)

Response Handling

Time Periods

Complete Example

File Structure

Get API Key

Documentation

Support

License

About

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Contributing

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