Exchange Rates API
One API for Every Currency Conversion
From BTC to USD. EUR to ETH. USDC to GBP.
Access real-time and historical exchange rates across thousands of digital assets and more than 150 fiat currencies through a single API.
Whether you're building accounting software, payment systems, portfolio tools, analytics platforms, or AI applications, CoinAPI provides the exchange-rate infrastructure so you can focus on building products.
What Data Will You Get?
Real-Time Exchange Rates
Retrieve current exchange rates for any supported fiat or digital asset pair. Each response includes timestamps, asset identifiers, and the latest calculated rate.
Historical Rate Snapshots
Access point-in-time exchange rates for valuation, accounting, auditing, reporting, compliance, and portfolio analysis workflows.
One-to-Many Exchange Rates
Get exchange rates from one base asset to multiple quote assets in a single request. Reduce API calls and simplify currency conversion workflows.
Exchange Rate OHLC Time-Series
Retrieve historical OHLC exchange-rate data for supported asset pairs. Analyze trends using open, high, low, and close values across custom time intervals.
Multiple Time Granularities
Request exchange-rate history using periods ranging from seconds to days. Build charts, dashboards, reporting systems, and historical analytics workflows.
VWAP-Based Exchange Rates
Exchange rates are calculated using a rolling 24-hour Volume Weighted Average Price methodology across multiple market data sources.
Real-Time Exchange Rate Streams
Subscribe to live exchange-rate updates through a persistent WebSocket connection and receive continuous pricing updates as markets move.
Exchange Rate Methodology Data
Understand how rates are produced through rate type information, including direct pair calculations and cross-asset reference methodologies.
Asset Metadata
Access metadata for fiat currencies and digital assets including identifiers, names, asset types, coverage information, USD valuations, and blockchain addresses.
Asset Icons
Retrieve standardized asset icons in multiple sizes for use in dashboards, applications, portfolio systems, watchlists, and asset selectors.
Key Features
Current and Historical Pricing
Retrieve current exchange rates and historical values from the same platform. No separate integrations or datasets required.
VWAP-Based Methodology
Exchange rates are calculated using aggregated market activity across multiple sources, helping provide representative market pricing.
Broad Market Coverage
Access exchange rates across thousands of cryptocurrencies and more than 150 fiat currencies through a single API.
AI-Ready Access
Integrate directly with AI agents and LLM-powered applications through hosted MCP servers.
Consistent Data Model
Use the same asset identifiers, timestamps, and schemas across realtime and historical services.
Rate Transparency
Rate types and timestamps provide visibility into how each value is calculated. This supports validation and audit workflows.
The Challenge
The Challenge of Exchange Rate Infrastructure
Exchange rates seem simple.
Until you try to build the infrastructure yourself.
Digital assets trade across hundreds of exchanges. Fiat currencies move across global markets operating around the clock.
Many teams begin by collecting prices and calculating exchange rates internally. Then they discover:
- Fragmented market data
- Thousands of supported assets
- Different liquidity profiles
- Inconsistent pricing between venues
- Cross-rate calculations
- Historical storage requirements
- Real-time delivery challenges
- Ongoing infrastructure maintenance
CoinAPI solves that problem. We aggregate market data from hundreds of sources, apply transparent pricing methodologies, and deliver exchange rates through a single platform.
Instead of building pricing infrastructure, your team can focus on building products.
Exchange Rates Built for Production Workflows
Extensive Market Coverage
Access exchange rates across thousands of digital assets and more than 150 fiat currencies through a unified API.
Real-Time and Historical Access
Retrieve current exchange rates, historical snapshots, and OHLC time-series data from the same platform.
Transparent Pricing Methodology
Exchange rates are calculated using documented VWAP methodologies designed to provide representative market pricing.
Unified Fiat and Crypto Pricing
Access fiat and cryptocurrency exchange rates through the same normalized infrastructure and data model.
Built for Production
Designed for accounting platforms, payment systems, portfolio applications, analytics products, treasury operations, and institutional workflows.
Flexible Integration Options
Use the interface that best fits your environment: REST API, WebSocket API, JSON-RPC, and MCP.
Hosted MCP Access for Exchange-Rate Data
Model Context Protocol gives AI applications a standardized way to access external tools and data.
CoinAPI Exchange Rates includes hosted MCP servers for both realtime and historical exchange-rate data. Instead of building custom integrations, AI systems can directly:
- Discover supported assets
- Retrieve current exchange rates
- Query historical exchange rates
- Access OHLC time-series data
- Retrieve asset metadata
- Access asset icons
- Build valuation workflows
- Automate reporting processes
AI agents, internal copilots, and LLM-powered applications can access exchange-rate data through standardized MCP interfaces without building custom API integrations.
Because the MCP servers expose the same realtime and historical data as the REST and WebSocket APIs, an agent can discover supported assets, resolve a rate, and pull a historical series in a single conversation — using consistent identifiers, timestamps, and schemas across every interface.
One API, Multiple Ways to Access Exchange Rates
Different applications require different ways of accessing exchange-rate data. CoinAPI Exchange Rates supports multiple interfaces while maintaining the same underlying data model.
REST APIRetrieve:
- Current exchange rates
- Historical rate snapshots
- OHLC time-series data
- Asset metadata
- Asset icons
WebSocket APISubscribe to:
- Live exchange-rate updates
- Asset pair streams
- Continuous market pricing
JSON-RPC APIAccess:
- The same exchange-rate data through a JSON-RPC interface
MCP for AI ApplicationsAI systems can:
- Discover supported assets
- Retrieve current exchange rates
- Access historical data
- Query time-series information
- Build valuation workflows
- Automate reporting systems
Build vs Buy
Why CoinAPI Exchange Rates Instead of Building Your Own Pricing Infrastructure?
Reliable exchange-rate infrastructure requires market data collection, pricing methodologies, historical storage, normalization logic, streaming systems, monitoring, and ongoing maintenance. CoinAPI removes that burden.
Building Internal Pricing InfrastructureCoinAPI Exchange Rates
Market data collectionReady-to-use exchange rates
Exchange integration managementReal-time and historical access
Pricing methodology developmentVWAP-based methodology
Cross-rate calculationsBroad asset coverage
Historical data storageMultiple integration methods
Real-time streaming infrastructureManaged infrastructure
Data quality monitoringConsistent data schemas
Ongoing maintenanceSingle API integration
Whether you're creating accounting systems, payment platforms, treasury tools, portfolio applications, analytics products, AI workflows, or financial reporting systems, CoinAPI Exchange Rates provides a faster path from idea to production.
CoinAPI Exchange Rates
Start Building With CoinAPI Exchange Rates
Access real-time and historical exchange rates through one API.
Build accounting systems, payment platforms, treasury applications, portfolio tools, analytics products, AI workflows, and financial reporting solutions using reliable exchange-rate data designed for production use.