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 | Onchain consumption by smart contracts | Offchain 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 onchain 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 offchain 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.