Data Streams Reference
Chainlink Data Streams offers two distinct APIs for accessing low-latency market data. Choose the API that best fits your use case.
Which API should I use?
| Feature | Data Streams API | Candlestick API |
|---|---|---|
| Primary Use Case | On-chain consumption by smart contracts | Off-chain analytics, charting, dashboards |
| Data Format | Signed, verifiable data reports | Aggregated OHLC (candlestick) data |
| Interfaces | REST API & WebSocket | REST API (including a streaming endpoint) |
| Authentication | HMAC Signature | JWT (token-based) |
| Cryptographic Proof | ✅ Yes (fullReport blob) | ❌ No |
Data Streams API
Use the Data Streams API for applications that require high-frequency, verifiable data for on-chain execution. It provides access to cryptographically signed data reports that can be verified and used by smart contracts. This API is designed for applications that depend on low-latency, tamper-proof data.
View the Data Streams API Reference
Candlestick API
Use the Candlestick API for off-chain applications. It provides historical open-high-low-close (OHLC) data and real-time price updates in a format compatible with the TradingView data integration specification. This is ideal for building dashboards, analytics platforms, portfolio trackers, and research tools.