Forex API Documentation: Real-Time and Historical Currency Data

Access comprehensive, real-time forex data with a powerful and flexible API designed for developers, traders, and financial analysts. The FCS Forex API delivers live exchange rates across 145+ countries and supports over 2,000 currency pairs, making it one of the most robust solutions for real-time and historical foreign exchange data integration.

Whether you're building a trading dashboard, analyzing market trends, or developing algorithmic strategies, this API provides accurate, up-to-the-minute pricing, technical indicators, historical data, and economic calendar events — all accessible via simple JSON responses.

Key Features of the Forex API

The FCS Forex API is engineered for performance, accuracy, and ease of use. It connects to 25+ live data sources to ensure reliable updates every 30 seconds or faster. With support for multiple timeframes — from 1-minute candles to monthly intervals — it’s ideal for both short-term traders and long-term analysts.

Core capabilities include:

✅ Real-time forex rates
✅ Historical exchange data (from 1995 onward for daily+ intervals)
✅ Technical indicators (RSI, MACD, Moving Averages, Pivot Points)
✅ Currency conversion and base currency pricing
✅ Economic calendar with actual, forecast, and previous values
✅ Multi-request aggregation to reduce latency

👉 Discover how real-time forex data can power your next financial application.

Getting Started with API Integration

Integrating the FCS Forex API is straightforward and language-agnostic. Developers can use any programming environment that supports HTTP requests — including JavaScript (AJAX), Python, PHP, Java, C#, or command-line tools like cURL.

All responses are delivered in JSON format, ensuring seamless parsing and compatibility across platforms.

Obtain Your Access Key

To authenticate your requests, you’ll need an API access key. This unique key must be included in every request URL as a query parameter:

https://fcsapi.com/api-v3/forex/latest?access_key=YOUR_ACCESS_KEY&symbol=EUR/USD

Replace YOUR_ACCESS_KEY with your actual key obtained from your account dashboard.

Understanding API Parameters

Each endpoint accepts a range of parameters to customize your data fetch. Below are the most commonly used ones:

Parameter	Required?	Description
`access_key`	Yes	Authenticates your request
`symbol`	Optional*	Currency pair symbol (e.g., EUR/USD)
`id`	Optional*	Unique identifier for a currency pair
`period`	Optional	Timeframe: 1m, 5m, 1h, 1d, 1w, month
`from`, `to`	Optional	Date range for historical queries (YYYY-MM-DD)
`amount`	Optional	Amount to convert in currency converter
`output`	Optional	Response format (default: json)

*At least one of symbol or id is required in most endpoints.

Supported Symbols and Currency Lists

To retrieve a full list of supported forex pairs, use the List API:

https://fcsapi.com/api-v3/forex/list?access_key=YOUR_ACCESS_KEY

This returns structured JSON data including:

id: Unique numeric identifier
name: Full currency pair name
symbol: Trading symbol (e.g., EUR/USD)
decimal: Decimal precision

Use these symbols in subsequent calls to other endpoints like price fetching, conversion, or technical analysis.

Live Currency Rates: Latest Price API

Stay updated with real-time forex prices using the Latest Price API. Prices are refreshed every 30 seconds or less.

Example Request:

https://fcsapi.com/api-v3/forex/latest?symbol=EUR/USD,GBP/JPY&access_key=YOUR_ACCESS_KEY

Response Includes:

Open (o), High (h), Low (l), Close (c) prices
Change (ch) and change percentage (cp)
Last update time (t, Unix timestamp)

👉 See how live forex data enhances trading strategy development.

Currency Conversion Made Simple

Convert between any two currencies instantly using the Currency Converter API.

Example:

https://fcsapi.com/api-v3/forex/converter?symbol=EUR/USD&amount=500&access_key=YOUR_ACCESS_KEY

Returns:

Exchange rate (1 EUR = X USD)
Converted total based on input amount

Ideal for payment gateways, e-commerce platforms, and personal finance apps.

Historical Data for Market Analysis

Analyze long-term trends with access to historical forex data dating back to 1995 for daily and longer intervals. For shorter timeframes (1m–5h), data spans up to 6 months.

Fetch Recent Candles:

https://fcsapi.com/api-v3/forex/history?symbol=EUR/USD&period=1d&level=3&access_key=YOUR_ACCESS_KEY

Use level=1 (300 candles), level=2 (600), or level=3 (900) to control volume.

Specific Date Range:

https://fcsapi.com/api-v3/forex/history?symbol=EUR/USD&from=2025-01-04&to=2025-07-04&period=1d&access_key=YOUR_ACCESS_KEY

Perfect for backtesting strategies and visualizing price movements.

Technical Indicators & Trading Signals

Make informed decisions with built-in technical analysis powered by real-time market data.

Available Tools:

Moving Averages (SMA/EMA): 5 to 200-period averages with buy/sell signals
Pivot Points: Classic, Fibonacci, Camarilla levels
RSI, MACD, STOCH, ATR, and more

Each indicator is calculated using the last 300 candles in the specified timeframe.

Example: Moving Averages

https://fcsapi.com/api-v3/forex/ma_avg?id=1&period=1d&access_key=YOUR_ACCESS_KEY

Returns:

Individual MA values
Signal summary (Buy/Sell/Neutral)

Economic Calendar Integration

Track global economic events that impact currency markets in real time.

Features:

Event title, country, currency affected
Actual, forecast, and previous values
Importance level and source

Sample Call:

https://fcsapi.com/api-v3/forex/economy_cal?country=US,GB&from=2024-07-04&to=2025-07-04&access_key=YOUR_ACCESS_KEY

Useful for sentiment analysis and risk management.

Efficient Multi-Endpoint Requests

Reduce latency when fetching data from multiple endpoints using the Multi URL API.

Instead of sequential calls taking 20+ seconds, get all results in under 2 seconds.

Example:

https://fcsapi.com/api-v3/forex/multi_url
?base=api-v3/forex/
&url[candle]=candle?symbol=EUR/USD
&url[history]=history?symbol=EUR/USD
&url[tech]=indicators?symbol=EUR/USD
&access_key=YOUR_ACCESS_KEY

Ideal for dashboards requiring concurrent data pulls.

FAQ: Frequently Asked Questions

Q: Is there a free plan available for testing?
A: Yes, the Basic Plan includes 10,000 monthly requests — perfect for development and testing.

Q: How often is live data updated?
A: Prices are refreshed every 30 seconds or faster. The minimum refresh rate is 5 seconds.

Q: Can I use the API for algorithmic trading?
A: While the data is highly accurate, it is provided for informational purposes only. Always verify with your broker before executing trades.

Q: What happens if I exceed my monthly credit limit?
A: Usage is tracked in your dashboard. Credits reset on your billing date each month.

Q: Are responses always in JSON format?
A: By default, yes. You can also request XML or serialized output via the output parameter.

Q: Does the API support cryptocurrency pairs?
A: Yes. Set type=crypto to access over 1,500 crypto-to-fiat currency pairs.

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These keywords are naturally integrated throughout the content to align with user search intent while maintaining readability.

Final Thoughts

The FCS Forex API offers a complete toolkit for accessing global currency data with speed, reliability, and depth. From live pricing to advanced technical analysis and economic calendars, it empowers developers and traders alike to build smarter financial applications.

With flexible authentication, clear documentation, and efficient multi-request handling, it's designed to scale with your needs — whether you're prototyping or running production systems.

👉 Start leveraging real-time financial data today — explore powerful use cases now.