What Is jabber.cz and How Does It Relate to Jabbim?

jabber.cz is a domain associated with the Jabbim XMPP/Jabber service rather than a separate messaging server. If you want to use it, the practical path is to register an account on Jabbim (jabbim.com), connect with any XMPP client, and use the Jabbim services — including gateways to other networks and local tools for Czech, Polish, and Slovak users. Jabbim describes its services as free of charge.

What Jabbim actually is

Jabbim is a public instant messaging service built on the XMPP/Jabber protocol. It lets you send messages to friends in near-real time and, because XMPP is an open protocol, you can choose your own client instead of being locked into one app.

Key characteristics from the service's own description:

• Open protocol — pick whichever XMPP client you prefer.
• Interoperability — chat with users on other XMPP-enabled services and public Jabber servers, such as Google Talk, LiveJournal Talk, Gizmo, and others.
• No ads, no spam.
• Mobile use — connect from a phone and pay for data rather than SMS.
• Encryption — the service states it uses encryption to protect messages.
• Storage — up to 1GB of data storage.

How jabber.cz fits in

The domain appears among the service's associated keywords alongside jabbim and njs.netlab.cz. In practice this means jabber.cz is part of the same Jabbim ecosystem — a naming/domain association, not a distinct server you sign up for separately. To "use jabber.cz," you use Jabbim.

How to start using it

1. Register an account on Jabbim (the site's navigation includes a Register entry).
2. Choose and install an XMPP client. The service references Pidgin and Psi+ in its own notices.
3. Connect to the server using your new credentials.
4. Verify it works by sending a message to another XMPP user or joining a multi-user conference.

A note on certificates

Jabbim's flash news states that from September 30, 2021, some users may have had problems validating the service certificate, and advises updating client software (Pidgin, Psi+). If you hit connection or certificate errors, updating your client is the first thing to try.

Services and gateways you get

Jabbim offers transports/gateways so you can reach people on other networks from one client:

• AIM, Yahoo!, ICQ, Twitter, Facebook
• Skype (marked as new in the source)
• Telegram — register your phone number in international format at telegram.jabbim.com via service discovery in your client.

It also provides weather forecasts, live community support in an online multi-user conference, and local services for Czech, Polish, and Slovak users such as train and bus timetables, dictionaries, SMS gateways, and TV schedules.

Privacy option: connecting over TOR

Jabbim states it supports connection via TOR. The published onion address is:

mrbenqxl345o4u7yaln25ayzz5ut6ab3kteulzqusinjdx6oh7obdlad.onion

Port 5222. After installing TOR, use a Socks5 proxy at 127.0.0.1 with port 9050 (Tor client) or 9150 (Tor Browser), and enter that hostname in your client. Psi+ is recommended for this setup.

Sponsorship

Jabbim's site links to pages explaining how to become a sponsor and what you get in return, with PayPal listed as a payment platform. The service itself is described as free of charge; sponsorship is a separate, optional arrangement.

Quick reference