aid: a5x
name: A5X
description: >-
  A5X S.A. is a next-generation derivatives and futures exchange and clearing house being built for
  the Brazilian market, founded in 2023 in Sao Paulo by former XP executives Carlos Ferreira Filho and
  Karel Luketic together with Nilson Monteiro (Ideal) and Julian Chediak. It is an asset-light,
  technology-first venue running on London Stock Exchange Group trading, clearing and market
  surveillance technology, and it has raised R$385 million (about USD 72.6 million) from investors
  including IMC Trading, Jump Trading Group, Optiver, XTX Markets and ABN AMRO Clearing. Its listed,
  financially settled contract set covers stock index futures and options (local and offshore),
  single stock futures and options, currency futures and options, local interest rate futures and
  options, and cryptocurrency futures, with European-style options exercised automatically at expiry.
  For integrators, A5X publishes a technical developer portal covering connectivity (site-to-site VPN,
  LAN-to-LAN, cross connect at Equinix SP3, AWS Direct Connect), order entry, market data, drop copy
  and post-trade settlement, allocation, positioning and risk interfaces over FIX and binary
  protocols. The portal requires a login, so those specifications are not publicly readable.
image: https://a5x.com.br/wp-content/uploads/2025/07/A5X-Logo-Vetorizado-Azul-1.png
url: https://raw.githubusercontent.com/api-evangelist/a5x/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-09-05'
modified: '2026-09-05'
tags:
- Company
- Financial-Services
- Capital Markets
- Stock Exchange
- Derivatives
- Futures
- Trading
- Market Data
- Clearing
- FIX Protocol
- Brazil
tags_raw:
- Company
- Financial Services
- Capital Markets
- Stock Exchange
- Derivatives
- Futures
- Trading
- Market Data
- Clearing
- FIX Protocol
- Brazil
apis:
- aid: a5x:a5x-technical-interfaces
  name: A5X Technical Interfaces
  description: >-
    The trading, market data and post-trade interfaces A5X exposes to exchange participants —
    order entry and drop copy over FIX, a binary market data feed, and post-trade capture,
    allocation, positioning and risk messaging. Message catalogs, session recovery rules, order
    identifier formats and field limits are documented in the A5X Dev Portal (Portal Tecnico),
    which requires credentials; no public machine-readable contract (OpenAPI, AsyncAPI, GraphQL SDL
    or downloadable FIX dictionary) is published at an anonymous URL, and the exchange had not begun
    production operations as of this profile.
  humanURL: https://portal-tecnico.a5x.com.br/login
  image: https://a5x.com.br/wp-content/uploads/2025/07/A5X-Logo-Vetorizado-Azul-1.png
  tags:
  - Trading
  - Market Data
  - Post-Trade
  - FIX Protocol
  - Derivatives
  properties:
  - type: DeveloperPortal
    url: https://portal-tecnico.a5x.com.br/login
  - type: Documentation
    url: https://a5x.com.br/en/blog/a5x-en/a5x-dev-portal-provides-specifications-for-developers/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/a5x-domain-security.yml
- type: Website
  url: https://a5x.com.br/en/
- type: DeveloperPortal
  url: https://portal-tecnico.a5x.com.br/login
- type: Blog
  url: https://a5x.com.br/en/blog/
- type: BlogRSS
  url: https://a5x.com.br/en/feed/
- type: Support
  url: https://a5x.com.br/en/contact-us/
- type: TermsOfService
  url: https://a5x.com.br/en/terms-of-use/
- type: PrivacyPolicy
  url: https://a5x.com.br/en/privacy-policy/
- type: LinkedIn
  url: https://www.linkedin.com/company/a5x
- type: LLMsTxt
  url: llms/a5x-llms.txt
- type: Plans
  url: plans/a5x-plans-pricing.yml
- type: RateLimits
  url: rate-limits/a5x-rate-limits.yml
- type: Lifecycle
  url: lifecycle/a5x-lifecycle.yml
- type: Conformance
  url: conformance/a5x-conformance.yml
x-enrichment:
  date: '2026-09-05'
  status: minimal
  artifacts_added: 7
  pass: local-v3
x-coverage:
  state: gated
  reason: partner-login
  detail: >-
    Every A5X technical specification — FIX and binary order entry, market data, drop copy, and the
    post-trade message catalogs — sits inside the Portal Tecnico wiki at portal-tecnico.a5x.com.br,
    which returns HTTP 403 to every anonymous request for a document path while the public /docs/
    archive on the marketing site holds only three billing pages whose bodies are placeholder text.
  evidence:
  - url: https://portal-tecnico.a5x.com.br/docs
    status: 403
  - url: https://portaldev.a5x.com.br/openapi.json
    status: 403
  - url: https://a5x.com.br/docs/documentacao-sobre-faturamento/
    status: 200
  - url: https://a5x.com.br/.well-known/security.txt
    status: 404
  checked: '2026-09-05'