# A5X

**Canonical:** https://apis.io/providers/a5x/  
**Website:** https://a5x.com.br/en/  
**APIs profiled:** 1

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.

## Kin Score — 18.4 / 100 (emerging)

Scored 2026-09-25 under rubric 0.23.0. Trend: flat (-0.9 from 19.3).

| Facet | Score |
|---|---|
| Discoverability | 64.3 |
| Contract Quality | 0.0 |
| Contract Governance | 18.2 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 26.2 |
| Access Clarity | 21.1 |

Regulatory layer — **Securities & Market Data**: 23.1 (matched via tags).

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (1)

- **A5X Technical Interfaces** — 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, ...

## Security (1)

- **A5X Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **A5X Plans Pricing**

## Tags

Company, Financial Services, Capital Markets, Stock Exchange, Derivatives, Futures, Trading, Market Data, Clearing, FIX Protocol, Brazil

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/a5x/). Scores are computed from the provider's own public artifacts under a published rubric.