# XiPackets

> XiPackets documents reverse-engineered Final Fantasy XI network behavior across its lobby, world, cache and patch services. Its notes cover packet definitions, server roles, message exchanges, and the compression, encryption and hashing used by those services.

- Type: Documentation
- Targets: Game · Protocol
- Category: Protocol analysis tools
- Relationship: Learning resource
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/atom0s/XiPackets>
- Primary source: <https://github.com/atom0s/XiPackets/blob/ebe2216a991ff88254ad600cc5bae8e3d9e80306/README.md>
- Catalog page: <https://awesomerea.org/resources/xipackets/>
- Record JSON: <https://awesomerea.org/resources/xipackets/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/xipackets/index.md)

## Requirements & limits

- **License:** AGPL-3.0 license.

## Primary sources

1. <https://github.com/atom0s/XiPackets/blob/ebe2216a991ff88254ad600cc5bae8e3d9e80306/README.md>
2. <https://github.com/atom0s/XiPackets/blob/ebe2216a991ff88254ad600cc5bae8e3d9e80306/lobby/Protocol.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.