Apache Vysper

Apache Vysper is a modular, open-source XMPP (Extensible Messaging and Presence Protocol) server developed under the Apache MINA project. It is designed to be a full-featured Jabber server that supports core XMPP standards and various XEP extensions. Vysper can run as a standalone server or be embedded into other applications, making it suitable for both lightweight and enterprise messaging solutions.

Features

• Full XMPP protocol support based on RFC3920 and RFC3921
• Modular architecture with support for XEP extensions
• Built-in modules for Multi-User Chat (XEP-0045), Publish/Subscribe (XEP-0060), and BOSH (XEP-0124, XEP-0206)
• XML stanza processing and user authentication
• Server-to-server communication support
• WebSocket and SOCKS5 bytestream endpoints
• Test client included for development and debugging
• Embeddable into Java applications

Capabilities

• Enables real-time messaging and presence across federated networks
• Supports extensibility through custom modules and endpoints
• Facilitates integration with existing authentication systems
• Provides flexible deployment options (standalone or embedded)
• Compatible with any XMPP-compliant client
• Offers service discovery and dynamic feature negotiation

Benefits

• Promotes open standards for secure and decentralized messaging
• Reduces development effort with built-in modules and test tools
• Enhances scalability and maintainability through modular design
• Supports federated communication across domains
• Encourages customization for specific messaging use cases
• Backed by the Apache community for long-term reliability