Connect to Clear Street with ZagTrader

Who is Clear Street?

Clear Street is a financial technology firm that operates as a prime broker and clearing firm, known for replacing legacy, decades-old brokerage infrastructure with a modern, cloud-native platform. Rather than bolting services onto aging systems, the firm is recognized for building prime brokerage, clearing, custody, and financing on unified technology designed for institutional clients such as hedge funds, professional traders, and broker-dealers. Its proposition combines execution access with the prime and clearing functions that sit behind it, delivered through APIs and real-time data rather than overnight files.

For execution and operations desks, Clear Street can therefore play two related roles: a route for order flow and a provider of prime brokerage, clearing, and custody beneath it. Reaching both sides of that relationship through a stable, well-monitored, and well-structured connection is a practical requirement for any desk that uses it, and that is the role ZagTrader is built to fill on the order-management and post-trade side. The exact services and arrangements available always depend on a client's own agreements and onboarding with the firm.

How ZagTrader connects and routes to Clear Street

ZagTrader provides institutional connectivity to Clear Street through FIX sessions and supported API interfaces, established and tested so that order flow, executions, acknowledgements, and post-trade messages travel over resilient, monitored links rather than manual files or one-off scripts. The same connectivity supports direct market access (DMA) workflows, allowing desks to send orders through Clear Street while retaining full control and visibility on the trading blotter.

Connectivity is delivered as part of ZagTrader's integrated Order Management System (OMS) and Execution Management System (EMS). Traders work from a unified blotter, apply pre-trade compliance and risk checks, and use smart order routing logic to direct orders appropriately before they leave the desk. Drop-copy sessions provide an independent, real-time stream of execution and order-status messages for reconciliation, surveillance, and risk monitoring. Because order management, execution, routing, and post-trade share one platform, there are no brittle hand-offs between disconnected systems.

• FIX and API sessions for order entry, execution reports, and acknowledgements.
• Direct market access (DMA) order flow with full blotter visibility.
• Smart order routing managed within the OMS/EMS before orders are sent.
• Drop-copy sessions for independent reconciliation and surveillance.
• Pre-trade compliance and risk checks applied before orders leave the desk.

Markets and assets you can access

Clear Street is best known for prime brokerage, clearing, and execution access in US equities and listed options, delivered on a single modern platform. Routing through it via ZagTrader's multi-asset platform lets a desk reach that access from one consistent workflow rather than maintaining separate tools per product line. The specific instruments, markets, and services available always depend on a client's own agreements and onboarding with the firm.

• Equities — cash equities access across supported US markets.
• Options — listed equity and index options for hedging and strategy.
• Prime brokerage and financing services under the relevant client agreements.
• Clearing and custody for supported instruments through the firm's platform.
• Additional products and markets as covered by the client's onboarding.

Post-trade, clearing, custody, and reporting

Execution is only the first step in the trade lifecycle, and ZagTrader is built to carry flow routed to Clear Street all the way through to booking. Fills captured over FIX and API and confirmed via drop-copy feed straight into the platform's post-trade processing, so that trades, allocations, and positions are kept consistent without manual re-keying. Because Clear Street also provides prime brokerage, clearing, and custody, the same integration carries allocation and post-trade data through to that layer, and brings position, balance, and corporate-action data back so that the platform's records reflect what is actually cleared and held.

The platform supports trade confirmation and allocation, generation of settlement instructions, and reconciliation against counterparty, custodian, and clearing records. Clearing, custody, and settlement themselves take place through Clear Street and the relevant market infrastructure; ZagTrader's role is to manage the order and post-trade data flow accurately around that process and keep a firm's books and records aligned. Reporting and audit-ready record keeping are produced from the same source of truth that runs from order inception, helping desks meet their internal control and regulatory obligations.

Why route to Clear Street through ZagTrader

Routing to Clear Street through ZagTrader means consolidating execution, routing, risk, compliance, and post-trade onto one multi-asset front-to-back platform, while Clear Street provides modern prime brokerage, clearing, and custody beneath it. A single OMS/EMS blotter spans Clear Street alongside other supported brokers, venues, and counterparties, so traders manage their full book in one place and operations work from one consistent set of records that stays aligned with the clearing and custody platform.

FIX and API connectivity with drop-copy reconciliation give desks confidence that what was sent, executed, cleared, and booked all agree, while smart order routing and pre-trade controls keep execution disciplined. As needs grow, the same platform scales to additional counterparties, asset classes, and markets without re-platforming, making ZagTrader a durable foundation for desks that pair modern prime brokerage and clearing at Clear Street with multi-asset order management and beyond.

• One multi-asset OMS/EMS for Clear Street and additional brokers, venues, and counterparties.
• FIX, API, and DMA connectivity with drop-copy reconciliation.
• Smart order routing and pre-trade compliance and risk controls.
• Integrated post-trade flow from execution through clearing, custody, and reporting.
• Scales to more counterparties, asset classes, and markets without re-platforming.