Currencies API: Real-Time & Historical FX Data for Developers

For projects requiring access to a broad spectrum of foreign exchange (FX) data, including both fiat and cryptocurrencies, Currencies API by FinFeed API is the solution. This service provides robust access to both real-time and historical currency information, essential for a variety of financial applications.

The API offers:

• Real-time FX data via https://api-realtime.fx.finfeedapi.com
• Historical FX data via https://api-historical.fx.finfeedapi.com

Authorization for both is handled via an API Key included in the request header.

Main Features: What Is Available?

Currencies API offers a comprehensive toolkit for working with currency data, from basic asset information to detailed exchange rate history.

1. Asset & Metadata Endpoints: Gain a foundational understanding of available currencies and their properties.

• List All Assets (/v1/assets): Retrieve a full list of supported assets, including fiat currencies (aligned with ISO 4217 codes) and cryptocurrencies. Details include:
  • asset_id (e.g., "USD", "BTC")
  • name (e.g., "US Dollar", "Bitcoin")
  • type_is_crypto (boolean indicating if it's a cryptocurrency)
  • Data availability ranges for quotes, order books, and trades
  • Recent trading volumes (1hr, 1day, 1mth in USD)
  • Current price in USD (for non-USD assets)
  • chain_addresses for cryptocurrencies, specifying chain and network IDs.
  • You can filter this list using the filter_asset_id query parameter (e.g., BTC;ETH).
• Get Specific Asset (/v1/assets/{asset_id}): Fetch detailed information for a single asset using its ID.
• Asset Icons (/v1/assets/icons/{size}): Get URLs for asset icons of a specified pixel size, perfect for enhancing your application's UI.

2. Exchange Rate Endpoints: Access up-to-date and past exchange rates. FinFeed API's exchange rates are typically calculated as a 24-hour Volume Weighted Average Price (VWAP-24H) across multiple high-quality data sources, ensuring reliability.

• Current/Real-Time Exchange Rates (via Realtime API):
  • Specific Pair (/v1/exchangerate/{asset_id_base}/{asset_id_quote}): Get the current exchange rate between two specified assets (e.g., BTC/USD). The response includes the timestamp of the rate.
  • All Rates for a Base Asset (/v1/exchangerate/{asset_id_base}): Retrieve current exchange rates for a given base asset against all other available quote assets. You can:
    • Filter the quote assets using filter_asset_id.
    • Invert rates using the invert=true parameter (e.g., to see USD/BTC instead of BTC/USD).
• Historical Exchange Rates (via Historical API):
  • Specific Pair at a Specific Time (/v1/exchangerate/{asset_id_base}/{asset_id_quote}?time={timestamp}): Get the exchange rate for an asset pair as it was at a particular point in the past by providing an ISO 8601 timestamp.
  • All Rates for a Base Asset at a Specific Time (/v1/exchangerate/{asset_id_base}?time={timestamp}): Similar to the current rates endpoint, but for a historical snapshot. Filtering and inversion are also supported.
  • Supported Timeseries Periods (/v1/exchangerate/history/periods): List all available time granularities for historical data, including various second (SEC), minute (MIN), hour (HRS), and day (DAY) intervals.
  • Historical Timeseries Data (/v1/exchangerate/{asset_id_base}/{asset_id_quote}/history): Retrieve a series of historical exchange rates for a specific asset pair. This provides open, high, low, and close rates for each period. Parameters include:
    • period_id (e.g., 1DAY, 1HRS)
    • time_start (ISO 8601)
    • time_end (ISO 8601)
    • limit (for pagination, default 100, max 100,000)

Applications: Supporting Your Developments

Currencies API can fuel a wide range of financial tools and platforms:

• Currency Converters: Build tools for quick and accurate conversions between fiat and cryptocurrencies using real-time or historical rates.
• Forex & Crypto Trading Bots: Develop automated trading strategies based on real-time rate fluctuations and historical trends.
• Financial Dashboards & Analytics: Create visualizations of currency movements, portfolio values, and market trends over time.
• E-commerce Platforms: Display prices in multiple currencies and process international payments with up-to-date exchange rates.
• Portfolio Management Systems: Track the value of assets denominated in different currencies.
• Arbitrage Detection Tools: Identify potential price discrepancies across different currency pairs (always verify with live exchange data for execution).
• Economic Research & Forecasting: Analyze long-term currency trends and relationships.
• Crypto Information Portals: Display detailed information about various cryptocurrencies, including their current USD value and historical performance.

Currencies API offers a detailed data source for developers working with both traditional fiat currencies and the expanding world of digital assets. With access to both real-time and extensive historical data, you can build more informed and feature-rich financial applications. Examine the API documentation to see how it can fit into your next project.