This API is in private preview. Target September 2026; timing is subject to change.
HyperCore gRPC provides block streaming and order-book streaming at price-level, top-of-book, and order-level detail, plus trigger-order updates. Connection details and generated client configuration will be published as the service is finalized.
| Stream | Delivers |
|---|---|
| StreamBlocks | Raw blocks, one message per block |
| StreamL2Book | Aggregated price-level snapshots |
| StreamL2BookDiff | Incremental price-level changes |
| StreamL4BookUpdates | Per-order changes with queue position |
| StreamBboBook | Top-of-book best bid and offer |
| StreamTpslUpdates | Take-profit and stop-loss order lifecycle |
WebSocket and gRPC can expose the same market data through different transports. Use WebSocket streams when integrating with the subscription envelope, and use gRPC streams when integrating with the RPC service definition. For L2 books, l2Book and l2BookDiff describe complementary snapshot and diff representations.