aid: capital-markets-gateway
name: Capital Markets Gateway
description: >-
  Capital Markets Gateway (CMG) is a New York headquartered financial technology company that connects
  the buy side and the sell side across the equity capital markets (ECM) offering process. Its two
  products are CMG XC, a workflow-management platform carrying the full ECM deal lifecycle — offering
  setup, termsheet publication, a consolidated and de-duplicated order book, bookbuilding, allocations,
  designations and trade release — and CMG DataLab, an ECM data and analytics service spanning 20+ years
  and 60,000+ equity transactions across 50+ regions, with 550+ deal, structure and performance metrics
  per deal. CMG names three programmatic surfaces in its own public FAQs — a DataLab Real-Time Feed
  (GraphQL API), a CMG XC REST API covering setup through allocation and post-trade, and EventHub
  real-time event notifications for straight-through processing into OMS and trade-processing systems —
  but publishes no public API reference, endpoint or machine-readable contract for any of them. The
  documentation host redirects to a customer identity login.
image: https://cmgx.io/wp-content/uploads/2024/11/CMG_URLPreview_2024-11-06-min-1-scaled.jpg
url: https://raw.githubusercontent.com/api-evangelist/capital-markets-gateway/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enriched-from-public-developer-surface
specificationVersion: '0.23'
created: '2026-08-09'
modified: '2026-08-09'
tags:
- Company
- Financial Services
- Capital Markets
- Equity Capital Markets
- Market Data
- Data Intelligence
- Workflow Management
- Investment Banking
- Fintech
apis:
- aid: capital-markets-gateway-datalab-real-time-feed
  name: CMG DataLab Real-Time Feed (GraphQL API)
  description: >-
    Schema-driven GraphQL access to CMG's live and historical ECM dataset. Per CMG's published FAQ the
    feed lets teams "query specific fields across deals, participants, terms and activity through a
    single flexible endpoint" and stream live ECM data into internal data warehouses, dashboards,
    pricing models, risk systems and analytics tools. No public endpoint, SDL or reference is
    published; access is arranged through CMG and documentation sits behind a customer login.
  humanURL: https://cmgx.io/data-insights/
  tags:
  - GraphQL
  - Market Data
  - Equity Capital Markets
  - Real-Time Data
  properties:
  - type: x-access
    url: https://cmgx.io/book-a-demo/
- aid: capital-markets-gateway-xc-rest-api
  name: CMG XC REST API
  description: >-
    REST API for the CMG XC workflow platform. Per CMG's published FAQ it provides "systemic support of
    the full ECM deal lifecycle from setup through allocation and post-trade" and "integrates with CRM,
    OMS and trade processing systems for straight-through processing with buy-side participants."
    Allocations can be released and consumed electronically via the REST API. No public endpoint,
    OpenAPI or reference is published.
  humanURL: https://cmgx.io/workflow-management/
  tags:
  - REST
  - Equity Capital Markets
  - Order Management
  - Straight-Through Processing
  properties:
  - type: x-access
    url: https://cmgx.io/book-a-demo/
- aid: capital-markets-gateway-eventhub
  name: CMG XC EventHub
  description: >-
    Real-time event notification surface for CMG XC. Per CMG's published FAQ, "real-time event
    notifications are delivered via EventHub, enabling STP integration with internal trade processing
    and OMS platforms," connecting platform events such as trade release, allocation updates and
    attestation status changes into internal workflows. No AsyncAPI, event catalog or subscription
    reference is published.
  humanURL: https://cmgx.io/workflow-management/
  tags:
  - Events
  - Streaming
  - Equity Capital Markets
  properties:
  - type: Webhooks
    url: asyncapi/capital-markets-gateway-eventhub.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://cmgx.io/
- type: Blog
  url: https://cmgx.io/news-insights/
- type: BlogRSS
  url: https://cmgx.io/feed/
- type: SignUp
  url: https://cmgx.io/sign-up/
- type: Support
  url: https://cmgx.io/contact/
- type: TermsOfService
  url: https://cmgx.io/terms-of-use/
- type: PrivacyPolicy
  url: https://cmgx.io/privacy-policy/
- type: GitHubOrganization
  url: https://github.com/capital-markets-gateway
- type: LinkedIn
  url: https://www.linkedin.com/company/cmg-capital-markets-gateway
- type: Twitter
  url: https://twitter.com/cmgxio
- type: LLMsTxt
  url: llms/capital-markets-gateway-llms.txt
- type: Webhooks
  url: asyncapi/capital-markets-gateway-eventhub.yml
- type: Conformance
  url: conformance/capital-markets-gateway-conformance.yml
- type: DomainSecurity
  url: security/capital-markets-gateway-domain-security.yml
x-enrichment:
  date: '2026-08-09'
  status: minimal
  artifacts_added: 5
  pass: local-v1
x-coverage:
  state: gated
  reason: customer-only-docs
  detail: >-
    CMG names three programmatic surfaces in its own public FAQs — a DataLab Real-Time Feed (GraphQL
    API), a CMG XC REST API and EventHub event notifications — but its documentation host
    docs.cmgx.io 302s to a Document360 knowledge base behind the id.cmgecm.com customer identity gate,
    so no endpoint, GraphQL SDL, OpenAPI or event catalog is reachable without an active tenant.
  evidence:
  - url: https://docs.cmgx.io/
    status: 302
  - url: https://cmgx.io/developers/
    status: 404
  - url: https://cmgx.io/openapi.json
    status: 404
  - url: https://cmgx.io/data-insights/
    status: 200
  checked: '2026-08-09'