generated: '2026-09-05'
method: searched
source: https://a5x.com.br/en/blog/a5x-en/a5x-dev-portal-provides-specifications-for-developers/
note: >-
  A5X is a pre-launch Brazilian derivatives exchange. No machine-readable contract is published at
  any anonymous URL, so nothing here is derived from a spec — every entry below is either a
  first-party statement A5X makes on its own public site, or a recorded absence. The specification
  documents themselves live in the login-gated Dev Portal (portal-tecnico.a5x.com.br), so the
  conformance claims cannot be verified against a fetched contract.
standards:
- id: fix-protocol
  name: FIX Protocol
  conforms: true
  evidence: >-
    A5X's own Dev Portal announcement states the trading section documents order entry protocols
    "including FIX and binary implementations", with specifications covering order identifiers,
    field character limits and session recovery procedures.
  evidence_url: https://a5x.com.br/en/blog/a5x-en/a5x-dev-portal-provides-specifications-for-developers/
  evidence_kind: provider-statement
  contract_access: gated
  contract_location: https://portal-tecnico.a5x.com.br/login
- id: binary-order-entry
  name: Binary order-entry protocol (low latency)
  conforms: true
  evidence: >-
    Same announcement describes binary protocol implementations optimised for low-latency trading
    alongside the FIX interface. The specific binary encoding (SBE/FIXP or an LSEG Millennium-family
    native protocol) is not named on any public page.
  evidence_url: https://a5x.com.br/en/blog/a5x-en/a5x-dev-portal-provides-specifications-for-developers/
  evidence_kind: provider-statement
  contract_access: gated
- id: market-data-feed
  name: Market data distribution
  conforms: true
  evidence: >-
    The Dev Portal is documented as carrying market data message formats, update frequencies and
    subscription procedures, plus a drop copy surface. The wire format is not named publicly.
  evidence_url: https://a5x.com.br/en/blog/a5x-en/a5x-dev-portal-provides-specifications-for-developers/
  evidence_kind: provider-statement
  contract_access: gated
- id: rest-openapi
  conforms: false
  evidence: >-
    No OpenAPI or Swagger document at any probed path on a5x.com.br, portaldev.a5x.com.br or
    portal-tecnico.a5x.com.br.
- id: graphql
  conforms: false
  evidence: >-
    portal-tecnico.a5x.com.br answers anonymous GraphQL introspection, but the schema returned is
    the stock Wiki.js 2.x content-management API (Page/Asset/Site/Navigation types) belonging to the
    open-source wiki software A5X runs the portal on, not an A5X exchange interface. Anonymous
    pages.list returns an empty array. Not recorded as an A5X contract.
- id: asyncapi
  conforms: false
  evidence: No AsyncAPI document found; the event surface is an exchange market-data feed, not webhooks.
- id: oauth2
  conforms: false
  evidence: >-
    No /.well-known/oauth-authorization-server or /.well-known/openid-configuration on any host; the
    portal login is a first-party Wiki.js form.
- id: rfc9457-problem-details
  conforms: false
  evidence: No public error contract to evaluate.
- id: rfc9116-security-txt
  conforms: false
  evidence: /.well-known/security.txt returns 404 on a5x.com.br and 403 on the portal hosts.
domain_standard:
  market: capital-markets-exchange
  standard: FIX Protocol
  declared: true
  verified_in_contract: false
  note: >-
    FIX is the domain standard for a listed-derivatives venue and A5X declares it in its own
    developer communications, which is the strongest signal available for a participant deciding
    whether a bespoke connector is required. It is NOT verified against a fetched contract — the FIX
    dictionary, message catalog and session rules are inside the gated portal — so this is recorded
    as declared, not verified.
evidence:
- url: https://a5x.com.br/en/blog/a5x-en/a5x-dev-portal-provides-specifications-for-developers/
  status: 200
- url: https://portal-tecnico.a5x.com.br/graphql
  status: 200
- url: https://portal-tecnico.a5x.com.br/docs
  status: 403
- url: https://a5x.com.br/.well-known/security.txt
  status: 404