The FCS Crypto API is a powerful, developer-friendly solution for accessing real-time and historical cryptocurrency data across 35+ global exchanges. With support for over 1,500 cryptocurrencies and 5,000+ trading pairs, it delivers accurate market insights tailored for traders, analysts, and fintech developers. Whether you're building a crypto tracker, analyzing market trends, or integrating live price feeds into your application, FCS provides reliable data with minimal latency.
Backed by robust infrastructure and offering flexible endpoints, the FCS API enables seamless access to live crypto prices, historical candlestick data, technical indicators, supply metrics, and more—all in standardized JSON format. Designed for efficiency and scalability, it supports batch requests and high-frequency queries while maintaining fast response times.
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Core Features of the FCS Crypto API
Real-Time Market Data
Access up-to-the-minute cryptocurrency prices updated every 30 seconds to one minute. The Latest Price API delivers current open, high, low, close (OHLC), bid/ask spreads, and percentage changes for any supported coin pair. You can request data for single symbols, multiple IDs, or retrieve all available crypto prices at once using symbol=all_crypto.
This makes it ideal for dashboards, price converters, and alert systems requiring fresh market snapshots.
Historical Price Analysis
Understand past performance with granular historical data spanning from 1-minute intervals up to monthly candles. The Historical Price API allows you to specify time ranges using from and to parameters in ISO or Unix timestamp formats. Retrieve up to 900 data points per request depending on the level setting.
Use cases include backtesting trading strategies, identifying long-term trends, and conducting technical analysis with precise candlestick data.
Technical Indicators & Market Signals
Make informed decisions using real-time technical analysis tools:
- Moving Averages (MA): Get SMA and EMA values across 5, 10, 20, 50, 100, and 200-period windows.
- Pivot Points: Calculate key support and resistance levels using classic, Fibonacci, Camarilla, Woodie, and Demark methods.
- Technical Indicators: Access live RSI, MACD, Stochastic, ATR, CCI, and other indicators that help gauge market momentum and volatility.
These signals are updated regularly and provide actionable insights for traders monitoring entry and exit points.
Market Capitalization & Supply Metrics
Track essential fundamentals like circulating supply, max supply, market cap, and 24-hour trading volume via the CoinMarketCap-style API. Data updates every 5–15 minutes and supports conversion into multiple fiat and crypto currencies (e.g., USD, EUR, BTC).
This endpoint is particularly useful for portfolio tracking apps and investment research platforms evaluating asset valuation.
Currency Conversion & Base Pricing
Convert amounts between any two currencies instantly with the Currency Converter API, which supports both crypto-to-crypto and fiat-to-crypto pairs. Alternatively, use the Base API to see how one base currency (like USD) converts into dozens of cryptos simultaneously—perfect for exchange rate tables or wallet balance displays.
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Getting Started with the FCS API
To begin using the FCS Crypto API, you need an API access key, obtained after signing up. This unique key authenticates your requests by being passed as the access_key parameter in every URL.
Example base structure:
https://fcsapi.com/api-v3/crypto/{endpoint}/?access_key=YOUR_API_KEYRate limits allow up to 10 requests per minute per IP. For higher throughput or enterprise needs, contact support for custom plans.
All responses are returned in JSON format by default (output=json), though alternatives like XML and serialized arrays are also supported. Responses include standardized fields:
status: Request success statuscode: HTTP-style response codemsg: Human-readable messageresponse: Core data payloadinfo: Metadata including server time and credit usage
Key Parameters Explained
Understanding the available parameters ensures efficient querying:
access_key(required): Your authentication token.symbol(required): Currency symbol (e.g., BTC/USD). Useall_cryptoto fetch all pairs.id: Alternative identifier for a currency pair.type: Set tocryptofor digital assets orforexfor traditional currencies.pair1,pair2: Define specific currency pairs (e.g., BTC vs USD).from,to: Date range filters for historical queries (supports YYYY-MM-DD or Unix timestamps).period: Timeframe for candles — options include 1m, 5m, 1h, 1d, 1w, month.level: Controls volume of historical data (1 = 300 candles, 3 = 900 candles).amount: Specify quantity for conversion calculations.candle: Choose between active, closed, or both latest candles.time: Include timestamp details when set to1.output: Response format (default: json).
Usage Limits & Credit System
The FCS API operates on a credit-based model:
- Most endpoints consume 1 credit per request.
- Some data-heavy endpoints (Latest Price, Candle, Profile, Supply) use 1 credit per 100 records returned, rounded up.
- Free plan users get 500 credits per month, resetting on the billing date.
- Only successful responses (HTTP 200 with data) count toward usage.
Monitor your consumption through your account dashboard to optimize efficiency.
Frequently Asked Questions
Q: How do I get an API key?
A: Sign up on the FCS platform to receive your unique access key automatically.
Q: Can I request multiple symbols in one call?
A: Yes—most endpoints support comma-separated lists in the symbol or id parameter for bulk data retrieval.
Q: Is historical data available before 2015?
A: For select major cryptocurrencies, historical records go back to 1995, though coverage varies by asset.
Q: Does the API support WebSocket streaming?
A: Currently, FCS offers REST-based polling; real-time streaming is not supported.
Q: Are the technical signals suitable for live trading?
A: While signals are derived from real data, they are intended for educational or analytical purposes only—not guaranteed for live trading execution.
Q: How often is market cap data updated?
A: Supply and market cap metrics refresh every 5–15 minutes for accuracy.
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Advanced Tools: Multi-URL Requests
Save time and reduce latency by combining multiple API calls into a single request using the Multi URL API. Instead of making sequential requests that could take 20+ seconds for 10 endpoints, this feature returns all results in just ~2 seconds.
You can:
- Chain different endpoints (e.g., latest price + history + indicators)
- Reuse common parameters like
symbolandperiod - Encode URLs properly to avoid parsing errors
Ideal for dashboards needing synchronized data pulls without performance lag.
Final Thoughts
The FCS Crypto API stands out as a comprehensive solution for developers seeking reliable access to real-time and historical cryptocurrency data. Its rich feature set—from price tracking to technical analysis—combined with efficient credit usage and batch processing capabilities makes it a valuable tool in the blockchain ecosystem.
While not intended for direct trading execution due to potential delays or indicative pricing, it excels in powering research tools, analytics platforms, portfolio trackers, and educational resources.
By leveraging this API responsibly and understanding its limitations, developers can create insightful applications that empower users with timely market intelligence.