> ## Documentation Index
> Fetch the complete documentation index at: https://docs.blockdb.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Keep BlockDB datasets current with incremental feeds and verification hooks.

## Delivery Options

| Channel       | Best for                                               | Status       | Guide                                                 |
| ------------- | ------------------------------------------------------ | ------------ | ----------------------------------------------------- |
| **WebSocket** | Push-based live streams with sub-150 ms latency        | 🟡 Beta      | [WebSocket](/user-guide/real-time-delivery/websocket) |
| **Protobuf**  | Binary-encoded WebSocket streams for ultra-low latency | ✅ On Request | [Protobuf](/user-guide/real-time-delivery/protobuf)   |

<Note>
  All streams preserve `_tracing_id` so you can correlate live events back to archive records. See [Data Lineage](/data-catalog/overview/data-lineage) for details.
</Note>