Servers and Accounts

Before you log in, GUO's pre-game screen has a Servers tab. It replaces ClassicUO's single address field and single remembered account with a server list and saved accounts for each server.

The Servers tab

Group	What it holds
Your servers	Servers you added by address.
Favourites	Any server you starred, from any group.
Recent	The servers you played last.
Community	The catalogue built into the client: shards whose admins asked to be listed and that allow third-party clients.

• Open a server's card to see its address, era, emulator and status, and the accounts you saved for it. Then press Play.
• Live status: while the tab is open, GUO checks each Community shard at most once a minute. The check is a plain TCP connect: no login, no packets.
• Shards with their own art or maps are marked needs_custom_data. They need that shard's client files. GUO can point a server at its own client files (see Configuration).

Get a shard listed

Shard admins can ask for a place in the Community group by opening a pull request that adds one entry to servers/catalogue.json:

• Only shards that allow third-party clients such as ClassicUO or GUO are listed. Scraped toplists aren't used.
• The project owner approves every addition.
• servers/catalogue.sample.json shows every field filled in, and servers/README.md lists which fields are required.

Saved accounts and passwords

GUO keeps the accounts you save for each server in servers.json, in the client's user folder. The passwords themselves go to the operating system's own keystore, and the file records only which store holds each one.

Platform	Where the password is kept
Windows	DPAPI, tied to your Windows user. servers.json holds only ciphertext that no other user or machine can decrypt.
Android	The Android Keystore.
Linux, Steam Deck	The Secret Service keyring (libsecret).
No keystore available	GUO doesn't keep the password; you type it each time.

Upstream ClassicUO keeps one password in settings.json, hidden behind a simple XOR mask. GUO's classic login screen still has upstream's Save account box, and a password typed there is still stored the upstream way. Save it on the Servers tab instead to keep it in the keystore.

• Forget an account: Forget on its row. A keyring entry is deleted; a ciphertext entry is removed from the file.
• Don't keep the password: untick Save password when you add the account. Play then fills in the name, and you type the password on the login screen.

Dev logins (development builds only)

A debug build can mark accounts on the local dev shard (see Dev Shard) as dev accounts. Tick "Dev account" when you add the account on the dev shard's page (the box reads "Dev account (one-click login)").

• One click then logs in as that account and enters with its character, or shows the character list when it has several.
• From the world, the same click logs out first, so switching between an admin account and a player account is one action.
• Ctrl+Shift+D switches to the next dev account, from the world or the login screen.
• Release builds have no dev shard, so they have no dev logins. GUO never creates an account; dev accounts are your own.

Related

• Configuration: UO_SHARD_HOST, UO_SHARD_PORT and the client-data settings.
• Dev Shard: run a local ModernUO to play against.
• The design: docs/ui/second_screen_pregame.md and docs/data_formats.md section 18 (the catalogue fields).