Polyester market data is available through multiple delivery surfaces (the trading UI, REST, WebSocket, and FIX protocol), all drawing from the same underlying market state.
Delivery Surfaces
User interface (UI)
The Polyester website itself is a primary delivery surface for market data.
Prices, order books, trades, and candles displayed in the UI are driven by live market feeds and update continuously as market activity occurs. While the interface is optimized for interaction and visualization rather than programmatic access, it consumes the same underlying data sources that power external delivery methods. This ensures consistency between what users see in the interface and what is available through APIs.
REST
REST endpoints provide request–response access to market data.
Well suited for:
- Bots that poll for updates
- Systems that need historical or snapshot-style data
- Integrations that prioritize simplicity and reliability
All market data exposed through advanced interfaces is also available via REST, with the exception of certain high-frequency feeds that may be restricted.
WebSocket
WebSocket streams provide real-time, push-based access to live market updates.
Well suited for:
- Live trading interfaces
- Latency-sensitive consumers
- Applications that need continuous updates without polling
Streaming data is available in both JSON and Protobuf formats, allowing consumers to balance ease of use with performance.
ConnectRPC (advanced)
ConnectRPC provides a typed, protocol-based interface primarily intended for SDKs, internal tooling, and advanced users.
It exposes the same underlying data as REST and WebSocket, with stronger typing and tighter integration for supported environments.
Use of ConnectRPC is optional and not required to access market data.
Order-Level Data Access
Certain high-resolution data, such as order-level (L3) feeds, may be subject to access controls or delivery constraints.
Availability and eligibility for these feeds depend on market participation and platform policies, and may vary by delivery surface.
Details on L3 access and qualification are covered in the Order Book documentation.
Choosing a Delivery Method
Most users will interact with market data through the UI or REST endpoints.
Users building real-time systems or custom interfaces typically rely on WebSocket streams, while advanced users and SDK developers may choose ConnectRPC for deeper integration.
Developer Documentation
Refer to the Developer Documentation for:
- Endpoint listings
- Connection details
- Authentication
- Rate limits
- Schemas and examples