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

# Starbase API Overview

Starbase is Deribit's high-performance matching engine designed for institutional trading and market makers. Equipped with a **Simple Binary Encoding (SBE)** API, Starbase provides direct access to the matching engine with ultra-low latency, making it ideal for high-frequency trading applications.

Standard Deribit WebSocket APIs (e.g. `private/get_user_trades_by_instrument`) also work for orders placed through Starbase. A **REST** API with utility endpoints such as an order purge or order snapshot will also be added.

<Info>
  Starbase is accessible exclusively via **colocated cross-connect** at Deribit's data center or via **AWS Private Link** for clients connecting from AWS infrastructure. Internet connectivity is not supported. Contact [colo-support@coinbase.com](mailto:colo-support@coinbase.com) to arrange access.
</Info>

<Warning>
  **Open orders placed via Starbase are not visible in the Deribit web UI.** Due to Starbase's performance characteristics, the feed that powers the UI cannot keep up with the matching engine. Trades and positions will appear in the UI as expected — only open orders are affected.
</Warning>

**The main components of the Starbase API:**

<CardGroup cols={2}>
  <Card title="Binary Order Entry API" icon="book" href="/starbase/binary-api-reference">
    The Binary Order Entry API provides **direct access to the matching engine** using a high-performance binary protocol optimized for ultra-low latency trading.

    * **Order Entry**: Place, amend, and cancel orders with minimal latency. Supports single orders, [mass quotes](/articles/mass-quotes-specifications) (up to 15 double-sided quotes), and mass cancellation.
    * **Market Maker Protection (MMP)**: Built-in protection against adverse selection. See [Market Maker Protection](/articles/market-maker-protection) for details.
    * **Self Match Prevention (SMP):** A highly flexible system to avoid matching order internally.
  </Card>

  <Card title="Multicast Market Data" icon="network-wired" href="/starbase/multicast-channels">
    Market data is distributed via **multicast channels** organized by product type (BTC perpetuals/futures, BTC options, ETH perpetuals/futures, ETH options, etc.). The multicast channels have:

    * **Market-by-order data**: Market data is sent as L3 data, allowing for full reconstruction of the order book.
    * **A/B Redundancy**: Duplicate feeds (A and B) for high availability.
    * **Snapshot and Incremental Updates**: Snapshot feeds provide the full order book state, while incremental feeds provide real-time updates.
  </Card>

  <Card title="FIX Drop Copy" icon="copy" href="/starbase/fix-drop-copy-api">
    The **FIX Drop Copy** feed provides a consolidated view of all orders and trades across an entire account, regardless of which gateway they were submitted through.

    * **Full order visibility**: Captures all order lifecycle events — new, amended, filled, and cancelled.
    * **FIX 5.0 SP2**: Standard FIX protocol for easy integration with existing OMS/EMS systems.
    * **Account-wide scope**: Unlike per-gateway SBE connections, a single Drop Copy session covers the full portfolio.
  </Card>

  <Card title="Gateway Connectivity" icon="server" href="/starbase/gateway-connectivity">
    Starbase gateways run in **hot-hot A/B pairs** for resilience, with independent rate limits on each side. Clients are expected to connect to both gateways in a pair simultaneously for optimal throughput and redundancy.

    * **Colocated cross-connect**: Lowest latency option for clients physically present in Deribit's data center.
    * **AWS Private Link**: Secure private connectivity for clients on AWS without routing traffic over the public internet.
    * **Multiple gateway pairs**: Gateways are partitioned by underlying asset (BTC, ETH, Tier 2/3) to allow horizontal scaling.
  </Card>
</CardGroup>