generated: '2026-07-19'
method: searched
source: https://docs.miaxdx.com/changelog
summary: >-
  The MIAXdx (LedgerX) public API surface is effectively dormant. The documentation host, the REST
  API host and the order-entry host are all unreachable to external clients as of this probe, and
  the exchange's status page has been marked inactive by Statuspage. The exchange delisted its
  physically settled DCM and SEF products in July 2024, and in November 2025 Miami International
  Holdings agreed to sell 90% of MIAXdx to Robinhood Markets in partnership with Susquehanna
  International Group.
versioning:
  scheme: none
  current: null
  note: No version segment or version header is documented; paths are namespaced by domain.
deprecation:
  policy_url: null
  sunset_header: false
  note: >-
    No published deprecation policy and no RFC 8594 Sunset/Deprecation header support was found.
    Deprecations were announced only as changelog entries (e.g. order_locked and fee_locked
    balances deprecated; is_volatile parameter removed from /orders).
  changelog: changelog/ledgerx-changelog.yml
sla:
  url: null
  uptime_target: null
status_page:
  url: https://status.ledgerx.com
  active: false
  probed: '2026-07-19'
  probe_result: 200 redirecting to https://ledgerx.statuspage.io/inactive
  note: >-
    The Statuspage page resolves but has been deactivated, so no operational status is published.
    No StatusPage pointer is wired in apis.yml because no live status page exists.
host_probes:
- host: https://ledgerx.com
  status: 404
  probed: '2026-07-19'
- host: https://app.ledgerx.com
  status: 200
  probed: '2026-07-19'
  note: Web trading interface single-page app; still serving.
- host: https://api.ledgerx.com
  status: 530
  probed: '2026-07-19'
  note: Cloudflare 530 (origin unreachable).
- host: https://trade.ledgerx.com
  status: null
  probed: '2026-07-19'
  note: Connection failed; host did not respond.
- host: https://docs.miaxdx.com
  status: 403
  probed: '2026-07-19'
  note: Cloudflare error 1014, CNAME Cross-User Banned. docs.ledgerx.com redirects here.
- host: https://data.ledgerx.com
  status: 200
  probed: '2026-07-19'
- host: https://support.miaxdx.com
  status: 403
  probed: '2026-07-19'
  note: Zendesk help center; 403 to non-browser clients.
- host: https://www.miaxdx.com
  status: 404
  probed: '2026-07-19'
corporate_timeline:
- date: '2014'
  event: MIAXdx organized as a wholly owned subsidiary of Ledger Holdings Inc. (LedgerX LLC).
  source: https://www.sec.gov/Archives/edgar/data/1438472/000162828025035343/miamiinternationalholdings.htm
- date: '2021'
  event: Ledger Holdings acquired by West Realm Shires (parent of FTX.US).
  source: https://www.sec.gov/Archives/edgar/data/1438472/000162828025035343/miamiinternationalholdings.htm
- date: '2022-11'
  event: FTX files for bankruptcy.
  source: https://www.sec.gov/Archives/edgar/data/1438472/000162828025035343/miamiinternationalholdings.htm
- date: '2023-05-19'
  event: Miami International Holdings acquires 100% of MIAXdx; LedgerX LLC does business as MIAX Derivatives Exchange.
  source: https://www.sec.gov/Archives/edgar/data/1438472/000162828025035343/miamiinternationalholdings.htm
- date: '2024-07'
  event: All physically settled products delisted from the DCM and SEF; cash-settled binary options remain on the DCM.
  source: https://www.sec.gov/Archives/edgar/data/1438472/000162828025035343/miamiinternationalholdings.htm
- date: '2025-11'
  event: MIAX agrees to sell 90% of MIAXdx to Robinhood Markets in partnership with Susquehanna International Group, retaining 10%.
  source: https://www.sec.gov/Archives/edgar/data/1438472/000143847225000016/miaxsaleofmiaxdxtorobinh.htm
deprecated_operations: []