RFC 6121: Roster Versioning
Provides a way to send roster changes efficiently from servers by associating a version with roster and sending only the changed parts of roster
XEP-0045: Multi-User Chat
Provides a way for multiple users to create a room and chat with each other.
XEP-0065: SOCKS5 Bytestreams (Proxy)
Provides a generic protocol for streaming binary data between any two entities on an XMPP network. It establishes an out-of-band bytestream between any two XMPP users which can be direct(peer-to-peer) or mediated.
XEP-0115: Entity Capabilities
Provides a robust, scalable way for exchanging information about capabilities supported by an entity. It caches the results determined with the help of XEP-0030 for improved network efficiency.
XEP-0160: Best Practices for Handling Offline Messages
Checks if the server follows the best practices for Jabber/XMPP servers in handling messages sent to recipients who are offline.
XEP-0163: Personal Eventing Protocol
Allows users to send updates or events to all the contacts present in their roster. It is also used for avatars and enabling OMEMO encryption
XEP-0191: Blocking Command
Provides an easy to implement method to block communications with selected users.
XEP-0198: Stream Management
Improves network reliability by adding support for resuming terminated streams and adding the ability to know if a stream has been received by peer.
XEP-0280: Message Carbons
Provides a way for all clients of a user to be engaged in a conversation by carbon-copying outbound messages to all resources.
XEP-0313: Message Archive Management
Provides a protocol to query and control an archive of messages stored on a server. It is used to synchronise conversation history seamlessly between multiple clients, record conversations that take place on clients that do not support local history storage, etc.
XEP-0313: Message Archive Management (Multi-User Chat)
Provides a protocol to query and control an archive of messages of a multi user chat stored on a server. It is used to synchronise conversation history seamlessly between multiple clients, record conversations that take place on clients that do not support local history storage, etc. for a MUC
XEP-0352: Client State Indication
Allows a client to indicate its active/inactive state. This reduces bandwidth and resources required by optimising the traffic accordingly
XEP-0357: Push Notifications
Defines a way for an XMPP servers to deliver information for use in push notifications to mobile and other devices.
XEP-0363: HTTP File Upload
Provides a protocol for transferring files between entities by uploading the file to an HTTP server.
XEP-0368: SRV records for XMPP over TLS
Provides users a virtually zero overhead way to bypass restrictive firewalls that only allow HTTP over port 80 and HTTPS over port 443. For servers, it allows multiple services to run on the same port.
XEP-0398: User Avatar to vCard-Based Avatars Conversion
Converts between vCard and PEP based avatars
XEP-0157: Contact Addresses for XMPP Services (Abuse)
Checks if the server has a contact for reporting spam/abuse.
XEP-0077: In-Band Registration
Provides a protocol for registration of users directly through XMPP (in-band) or to discover a website on which users can register (out-of-band).
XEP-0156: Discovering Alternative XMPP Connection Methods (HTTP)
Allows web clients to discover connections methods