This document provides the details required to use OSL's REST, WebSocket and FIX protocols which are organized into our key business functions.

Please direct any questions or feedback to support@osl.com.

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The REST API / WebSocket API / FIX API access
A premium feature available exclusively to Corporate, Institutional, Professional Investor (PI), and omnibus clients. Retail users are not eligible for API functionality.

What you can do with OSL API

Business Functions

OSL operates a brokerage platform, an exchange venue and a custody solution.

Through our digital asset markets business, we deliver a world-class digital asset offering for professional clients which includes brokerage, exchange and custody, all of which are supported by industry-leading customer service.

Brokerage

Through OSL's brokerage offering, clients can access institutional-size liquidity with tight spreads on principal basis. Trades can be executed over-the-counter with our global sales trading team, or RFQ (Request for Quote) capabilities.

Exchange

OSL's exchange provides institutional-grade access to spot markets using an aggregated Central Limit Order Book (CLOB) model which provides shared liquidity access with OSL’s global SaaS partners. The OSL exchange has an ultra-low latency matching engine and is accessible directly via API (FIX, REST & WebSocket), native browser GUI and other OMS/EMS vendor partners. Finally, participants are protected by the integration of a full suite of compliance tools including market surveillance and transaction monitoring.

Custody

OSL provides industry leading insured custody for digital assets, including comprehensive protection of customer assets for cold wallets and insurance for loss, damage, destruction, or theft of private keys.