# HKEX Orion Market Data Platform - Securities Market (OMD-C)

**Canonical:** https://apis.io/apis/hkex/hkex-orion-market-data-securities-omd-c/  
**Provider:** HKEX — https://apis.io/providers/hkex/  
**Documentation:** https://www.hkex.com.hk/Services/Market-Data-Services/Infrastructure/HKEX-Orion-Market-Data-Platform-Securities-Market-OMD-C?sc_lang=en

HKEX Orion Market Data Platform - Securities Market (OMD-C) is one of 4 APIs that [HKEX](https://apis.io/providers/hkex/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Market Data, Real-Time, Securities, Multicast, and Order Book. The published artifact set on APIs.io includes API documentation and an API reference.

Real-time datafeeds (OMD-C SS, SP, SF tiers) for all securities traded on the Stock Exchange of Hong Kong, published in a proprietary binary message format over one-to-many IP multicast/UDP for high throughput and low latency. Not an HTTP API - access is licensed through HKEX data licensing agreements, and the binary interface specifications and connectivity guides are public PDFs.

## Machine-readable artifacts (3)

- **Documentation** — https://www.hkex.com.hk/Services/Market-Data-Services/Infrastructure/HKEX-Orion-Market-Data-Platform-Securities-Market-OMD-C?sc_lang=en
- **APIReference** — https://www.hkex.com.hk/eng/prod/dataprod/Documents/HKEX_OMD-C_Binary_Interface_Specifications_v1.39b.pdf
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/hkex/refs/heads/main/apis.yml

## Other HKEX APIs (3)

- [HKEX Orion Market Data Platform - Derivatives Market (OMD-D)](https://apis.io/apis/hkex/hkex-orion-market-data-derivatives-omd-d/)
- [HKEX Data Marketplace Historical Data](https://apis.io/apis/hkex/hkex-data-marketplace-historical-data/)
- [HKEX FINI API](https://apis.io/apis/hkex/hkex-fini-api/)

## Tags

Market Data, Real-Time, Securities, Multicast, Order Book

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/hkex/hkex-orion-market-data-securities-omd-c/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/hkex/.