aid: hkex
url: https://raw.githubusercontent.com/api-evangelist/hkex/refs/heads/main/apis.yml
name: HKEX
kind: company
description: HKEX (Hong Kong Exchanges and Clearing Limited, SEHK 388) operates the
  Stock Exchange of Hong Kong, the Hong Kong Futures Exchange, and their clearing
  houses, and also owns the London Metal Exchange. As an exchange data arm it sells
  real-time securities and derivatives market data through the sales-gated HKEX Orion
  Market Data (OMD) platform - binary multicast datafeeds licensed to vendors and
  subscribers rather than a self-serve HTTP API - plus historical tick, full order
  book, and CCASS shareholding reference data through the HKEX Data Marketplace,
  delivered via SFTP, cloud-to-cloud transfer, and direct download. Its one publicly
  documented RESTful JSON API is the FINI API Gateway for IPO settlement workflows,
  restricted to registered market participants using OAuth 2.0 JWT credentials.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/hkex.png
tags:
- Financial
- Market Data
- Stocks
- Derivatives
- Exchange
- Real-Time
- Historical Data
- Order Book
- Reference Data
- IPO
created: '2026-07-21'
modified: '2026-07-22'
specificationVersion: '0.19'
apis:
- aid: hkex:hkex-orion-market-data-securities-omd-c
  name: HKEX Orion Market Data Platform - Securities Market (OMD-C)
  tags:
  - Market Data
  - Real-Time
  - Securities
  - Multicast
  - Order Book
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.hkex.com.hk/Services/Market-Data-Services/Infrastructure/HKEX-Orion-Market-Data-Platform-Securities-Market-OMD-C?sc_lang=en
  properties:
  - url: https://www.hkex.com.hk/Services/Market-Data-Services/Infrastructure/HKEX-Orion-Market-Data-Platform-Securities-Market-OMD-C?sc_lang=en
    type: Documentation
  - url: https://www.hkex.com.hk/eng/prod/dataprod/Documents/HKEX_OMD-C_Binary_Interface_Specifications_v1.39b.pdf
    type: APIReference
  description: 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.
- aid: hkex:hkex-orion-market-data-derivatives-omd-d
  name: HKEX Orion Market Data Platform - Derivatives Market (OMD-D)
  tags:
  - Market Data
  - Real-Time
  - Derivatives
  - Futures
  - Options
  - Multicast
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.hkex.com.hk/Services/Market-Data-Services/Infrastructure/HKEX-Orion-Market-Data-Platform-Derivatives-Market-OMD-D?sc_lang=en
  properties:
  - url: https://www.hkex.com.hk/Services/Market-Data-Services/Infrastructure/HKEX-Orion-Market-Data-Platform-Derivatives-Market-OMD-D?sc_lang=en
    type: Documentation
  - url: https://www.hkex.com.hk/-/media/HKEX-Market/Services/Market-Data-Services/Infrastructure/HKEX-Orion-Market-Data-Platform-Derivatives-Market-OMD-D/HKEX-OMDD-Developers-Guide-v1,-d-,26.pdf
    type: APIReference
  description: Real-time datafeeds (OMD-D DS, DP, DF tiers) for futures and options
    traded on the Hong Kong Futures Exchange, delivered in binary format over IP multicast/UDP
    with separate channel sets for stock options and non-stock options markets. Licensed,
    sales-gated access; the binary interface specification and developers guide are
    public PDFs.
- aid: hkex:hkex-data-marketplace-historical-data
  name: HKEX Data Marketplace Historical Data
  tags:
  - Historical Data
  - Tick Data
  - Full Order Book
  - Shareholding
  - Reference Data
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.hkex.com.hk/catalog
  baseURL: https://data.hkex.com.hk
  properties:
  - url: https://data.hkex.com.hk/catalog
    type: Portal
  - url: https://www.hkex.com.hk/Services/Market-Data-Services/Historical-Data-Services/HKEX-Data-Marketplace?sc_lang=en
    type: Documentation
  description: Web-based storefront for HKEX historical and reference data straight
    from the exchange - historical full order book tick data for securities and derivatives
    (CSV), CCASS shareholding data, and securities attribute daily files. Delivered
    via SFTP, cloud-to-cloud transfer, or direct download; onboarding is handled through
    the datamarketplace@hkex.com.hk team rather than self-serve API keys, and no REST
    API is documented.
- aid: hkex:hkex-fini-api
  name: HKEX FINI API
  tags:
  - IPO
  - Settlement
  - Reference Data
  - REST
  - Post-Trade
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.hkex.com.hk/Services/Platform-Services/FINI?sc_lang=en
  properties:
  - url: https://www.hkex.com.hk/Services/Platform-Services/FINI?sc_lang=en
    type: Documentation
  - url: https://www.hkex.com.hk/-/media/HKEX-Market/Services/Next-Generation-Post-Trade-Programme/Fini/FINI-API-User-Guide-v0,-d-,41.pdf
    type: APIReference
  description: The FINI (Fast Interface for New Issuance) API Gateway offers RESTful
    JSON endpoints (e.g. GET /api/ipos/list/v1, GET /api/ipos/refdata/v1) for market
    participants to automate IPO workflows - IPO reference data, EIPO subscriptions,
    and EIPO funding. Authentication uses OAuth 2.0 JWT-bearer grants against the
    HKEX Access Management server (https://openam.connect.hkex.com.hk) with registered
    RSA JSON Web Keys, TLS 1.2, and end-to-end payload encryption. Access is restricted
    to registered HKSCC participants, FINI banks, sponsors, and advisers - not open
    self-serve signup - but the API guide is a public PDF.
common:
- type: Authentication
  url: authentication/hkex-authentication.yml
- type: OAuthScopes
  url: scopes/hkex-scopes.yml
- type: Conventions
  url: conventions/hkex-conventions.yml
- type: ErrorCatalog
  url: errors/hkex-problem-types.yml
- type: RateLimits
  url: rate-limits/hkex-rate-limits.yml
- type: ChangeLog
  url: changelog/hkex-changelog.yml
- type: Lifecycle
  url: lifecycle/hkex-lifecycle.yml
- type: Conformance
  url: conformance/hkex-conformance.yml
- type: LLMsTxt
  url: llms/hkex-llms.txt
- type: WellKnown
  url: well-known/hkex-well-known.yml
- type: DomainSecurity
  url: security/hkex-domain-security.yml
- type: Website
  url: https://www.hkex.com.hk/
- type: Portal
  url: https://data.hkex.com.hk/catalog
- type: Documentation
  url: https://www.hkex.com.hk/Services/Market-Data-Services?sc_lang=en
- type: LinkedIn
  url: https://www.linkedin.com/company/hkex
- type: Blog
  url: https://www.hkexgroup.com/Media-Centre/Insight?sc_lang=en
- type: Pricing
  url: https://www.hkex.com.hk/Services/Rules-and-Forms-and-Fees/Fees/Overview?sc_lang=en
- type: TermsOfService
  url: https://www.hkex.com.hk/Global/Exchange/Terms-of-Use?sc_lang=en
- type: PrivacyPolicy
  url: https://www.hkex.com.hk/Global/Exchange/HKEX-Privacy-Notices?sc_lang=en
- type: Support
  url: https://www.hkex.com.hk/Global/Exchange/Contact?sc_lang=en
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com