Index API
Real-Time and Historical Cryptocurrency Index Data
Access real-time and historical cryptocurrency index data through a single API.
Retrieve VWAP indexes, Principal Market indexes, volatility indexes, historical values, time-series data, index composition and more! Access data through REST API, WebSocket API, and MCP.
Built for portfolio valuation, financial reporting, market research, AI applications, trading platforms, analytics products, institutions and developers who need transparent cryptocurrency benchmarks.
What Data Will You Get?
Volume-Weighted Average Price (VWAP) Indexes
Access volume-weighted cryptocurrency reference rates calculated across multiple exchanges. VWAP indexes reflect both price movement and trading liquidity over a rolling 24-hour period.
Principal Market Price (PRIMKT) Indexes
Retrieve prices from the most liquid exchange for a given asset pair. PRIMKT indexes identify the principal market and use the latest available market price for fair value measurement.
Cryptocurrency Volatility Indexes (CAPIVIX)
Measure expected future volatility for major cryptocurrencies including BTC and ETH. CAPIVIX indexes provide a standardized volatility benchmark similar to traditional market volatility indexes.
Real-Time Index Values
Access the latest index values with low-latency updates and precise timestamps. Retrieve current values for individual indexes through dedicated endpoints.
Historical Index Values
Query historical index data across custom time ranges for performance analysis, auditing, valuation, and research workflows.
Index OHLC Time-Series Data
Retrieve index-based OHLC data with intervals ranging from seconds to years. Analyze trends, build charts, and perform long-term market analysis.
Index Composition Data
Inspect the underlying components used to calculate index values. Access composition details and contributing market inputs for greater transparency.
Multi-Asset Index Weights
Retrieve asset allocation and weighting information for multi-asset indexes. Understand how individual assets contribute to overall index calculations.
Exchange Metadata
Access exchange identifiers, names, and reference information for venues contributing to index calculations.
Index Input Data
Inspect the market data sources used to build index values, including exchange-level inputs, trading pairs, status information, and calculation components.
Key Features
Cryptocurrency benchmarks are used across trading, research, valuation, reporting, and risk management workflows. CoinAPI Indexes are designed to provide transparent, reliable, and independently calculated market benchmarks built on high-quality market data.
Real-Time Index Streaming
Stream index values in real time using a low-latency WebSocket connection. Receive continuous updates as new values are calculated and published.
Proven Methodologies
Use established benchmark methodologies including VWAP, PRIMKT, and CAPIVIX. Each methodology is designed to represent different aspects of cryptocurrency market activity.
Full Transparency & Visibility
Inspect how indexes are constructed with access to underlying exchange inputs, asset pairs, compositions, and calculation data.
Robust Data Redundancy
Index calculations leverage multiple data sources and backup procedures to support continuity and resilience during exchange outages or data quality events.
Independent Benchmarks
CoinAPI operates as an independent index provider. Index methodologies are objective, rules-based, and designed to produce transparent benchmark values.
Custom Index Creation
Enterprise customers can create custom indexes based on specific asset selections, weighting schemes, or benchmark methodologies.
The Challenge
The Challenge of Cryptocurrency Benchmarks
Reliable cryptocurrency benchmarks are difficult to build.
Markets trade across hundreds of exchanges with different liquidity profiles, trading activity, market quality, and pricing behavior.
Most teams start by calculating their own reference rates and benchmark indexes. Then they discover:
- Different exchange reliability levels
- Different liquidity conditions
- Market fragmentation
- Inconsistent pricing across venues
- Outlier trades and anomalies
- Complex benchmark methodologies
- Ongoing maintenance requirements
- Governance and audit challenges
CoinAPI solves that problem. We collect market data from multiple exchanges, apply transparent methodologies, and deliver cryptocurrency benchmark indexes through a single platform.
Instead of building benchmark infrastructure, your team can focus on using trusted index data.
Why Developers Choose CoinAPI Indexes
Transparent Methodologies
Every index methodology is clearly documented and publicly available. Understand exactly how index values are calculated and maintained.
Multiple Benchmark Models
Access VWAP, Principal Market, and Volatility indexes designed for different use cases and market perspectives.
Real-Time and Historical Access
Retrieve current values, historical records, and time-series data from the same platform.
Independent Index Provider
CoinAPI does not operate trading venues or investment products based on these indexes. Index methodologies are objective, rules-based, and independently administered.
Full Visibility Into Calculations
Inspect index composition, exchange inputs, asset weights, and calculation data used to generate benchmark values.
Multiple Access Methods
Use the interface that fits your infrastructure: REST API, WebSocket API, and MCP.
CoinAPI Indexes includes a hosted MCP server.
Model Context Protocol (MCP) gives AI applications a standardized way to access external tools and data.
AI agents, internal copilots, and LLM-powered applications can discover and query cryptocurrency index data without building custom API integrations.
AI systems can directly:
- List available indexes
- Retrieve current benchmark values
- Query historical index data
- Access OHLC time-series data
- Retrieve multi-asset weights
- Explore exchange metadata
- Build valuation and reporting workflows
Real-Time Index Infrastructure
Build reliable benchmark-driven applications using low-latency index delivery.
CoinAPI provides both REST and WebSocket access for current and historical index data.
REST APIUse REST APIs for:
- Current index values
- Historical index data
- Time-series analysis
- Exchange metadata
- Multi-asset weights
WebSocket APIUse WebSocket APIs for:
- Real-time index updates
- Live monitoring systems
- Trading dashboards
- Portfolio tracking applications
MonitoringMonitor:
- Response status
- Latency
- Error rates
- Data availability
- Streaming connectivity
Why CoinAPI Indexes Instead of Building Your Own Benchmarks?
Many organizations attempt to build their own cryptocurrency reference rates and benchmark calculations. It seems straightforward at first. Then the complexity appears.
Reliable benchmarks require high-quality market data, exchange selection rules, methodology design, governance processes, quality controls, and ongoing maintenance.
CoinAPI removes that burden. Instead of building benchmark infrastructure internally, you can access professionally maintained cryptocurrency indexes through a single API.
Building Internal Benchmarks
- Exchange selection management
- Benchmark methodology design
- Data quality monitoring
- Outlier filtering
- Governance requirements
- Historical benchmark storage
- Ongoing maintenance
- Internal audit processes
CoinAPI Indexes
- Ready-to-use benchmark indexes
- Transparent methodologies
- Independent administration
- Real-time and historical access
- Multiple index models
- Documented governance processes
- Built-in quality controls
- Single API integration
Spend less time maintaining benchmark infrastructure and more time building products. Whether you're creating analytics platforms, valuation systems, portfolio tools, AI applications, research products, or institutional workflows, CoinAPI Indexes provides a faster path from idea to production.
Index API
Start Building With CoinAPI Indexes
Access real-time and historical cryptocurrency index data through one API. Build valuation systems, portfolio tools, analytics platforms, AI applications, market intelligence products, and institutional workflows using transparent cryptocurrency benchmarks designed for production use.
