# quickfix-j/quickfixj

QuickFIX/J is a full featured messaging engine for the FIX protocol. - This is the official project repository.

Repository: https://github.com/quickfix-j/quickfixj
Canonical: https://ross.abutalabs.com/products/quickfixj
Homepage: http://www.quickfixj.org
Language: Java
License: NOASSERTION
License Family: other
Topics: quickfix, quickfixj, fixprotocol, java, protocol, cryptocurrency, finance, financial-information-exchange, financial-markets, fintech, trading-systems
Last push: 2026-08-31T05:28:07+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 100, release rhythm 84, longevity 100
- inputs: {"age_days": 4489, "days_push": 2, "days_rel": 29, "gap_med": 69.5, "n_releases_24m": 5}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1150, forks 671 (observed 2026-09-01T02:14:06.151789+00:00)

## What it is
QuickFIX/J is a full-featured, 100% Java messaging engine for the FIX protocol, supporting FIX 4.0 through FIXLatest and FIXT 1.1. It provides session management, message validation via XML DataDictionaries, pluggable persistence and logging, and high-throughput asynchronous networking built on Apache MINA.

## Use cases
- connect to an exchange over FIX to route orders
- build a FIX acceptor server for broker clients
- process high-frequency market data feeds in Java
- implement a FIX client (initiator) for a trading system
- customize FIX message validation for exchange-specific tags
- monitor and manage FIX sessions via JMX

## When to choose
- you need a battle-tested, industry-standard open-source FIX engine on the JVM
- you must support multiple FIX versions including 5.0SP2 and FIXLatest
- you need high-throughput, low-latency session handling with thousands of concurrent connections
- you require pluggable message stores (File, JDBC, Memory) and customizable DataDictionaries

## When to avoid
- your project is not on the JVM and you cannot use Java libraries
- you need a simple REST or WebSocket market API rather than the FIX protocol
- you need a turnkey trading application rather than a messaging engine library

## Facets
- artifact type: library
- maturity: stable
- function: message-queue, networking, serialization, monitoring
- domain: fintech, apis, microservices
- platform: jvm, cross-platform
- tags: fix-protocol, fix-engine, trading-systems, financial-markets, order-routing, market-data, apache-mina, jmx, cryptocurrency

## Member repositories
- quickfix-j/quickfixj (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-09-01T02:14:06.151789+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:33:41.600538+00:00, confidence not recorded.
  - readme: https://github.com/quickfix-j/quickfixj (fetched 2026-09-01T02:14:06.151789+00:00, sha 726df6015e1a)
  - homepage: http://www.quickfixj.org (fetched 2026-08-29T12:38:42.764255+00:00, sha 007c05622595)
  - site_page: https://quickfixj.org/docs/deep-tech-reference (fetched 2026-08-29T12:38:42.782153+00:00, sha baae9ab20150)
  - site_page: https://quickfixj.org/docs/configuration (fetched 2026-08-29T12:38:42.783972+00:00, sha c3290a98fc6c)
  - site_page: https://quickfixj.org/docs/overview (fetched 2026-08-29T12:38:42.773372+00:00, sha c788dd75fd35)
  - site_page: https://quickfixj.org/docs/architecture (fetched 2026-08-29T12:38:42.775273+00:00, sha 56bfb90c28b6)
  - site_page: https://quickfixj.org/docs/developer-docs (fetched 2026-08-29T12:38:42.777034+00:00, sha e3319bf23be9)
  - site_page: https://quickfixj.org/docs/acceptor-dynamic (fetched 2026-08-29T12:38:42.778963+00:00, sha ba270b17561f)
  - site_page: https://quickfixj.org/docs/tutorials (fetched 2026-08-29T12:38:42.780531+00:00, sha 1c2ec807f30d)
- Data as of 2026-08-30T08:39:29.467469+00:00.