Web

Atlas can run as a web application in your browser, providing the same powerful AI coding experience without needing a terminal.

Getting Started

Start the web interface by running:

atlas web

This starts a local server on 127.0.0.1 with a random available port and automatically opens Atlas in your default browser.

Configuration

You can configure the web server using command line flags or in your config file.

Port

By default, Atlas picks an available port. You can specify a port:

atlas web --port 4096

Hostname

By default, the server binds to 127.0.0.1 (localhost only). To make Atlas accessible on your network:

atlas web --hostname 0.0.0.0

When using 0.0.0.0, Atlas will display both local and network addresses:

  Local access:       http://localhost:4096
  Network access:     http://192.168.1.100:4096

mDNS Discovery

Enable mDNS to make your server discoverable on the local network:

atlas web --mdns

This automatically sets the hostname to 0.0.0.0 and advertises the server as atlas.local.

You can customize the mDNS domain name to run multiple instances on the same network:

atlas web --mdns --mdns-domain myproject.local

CORS

To allow additional domains for CORS (useful for custom frontends):

atlas web --cors https://example.com

Authentication

To protect access, set a password using the ATLAS_SERVER_PASSWORD environment variable:

ATLAS_SERVER_PASSWORD=secret atlas web

The username defaults to atlas but can be changed with ATLAS_SERVER_USERNAME.

Using the Web Interface

Once started, the web interface provides access to your Atlas sessions.

Sessions

View and manage your sessions from the homepage. You can see active sessions and start new ones.

Server Status

Click "See Servers" to view connected servers and their status.

Attaching a Terminal

You can attach a terminal TUI to a running web server:

# Start the web server
atlas web --port 4096

# In another terminal, attach the TUI
atlas attach http://localhost:4096

This allows you to use both the web interface and terminal simultaneously, sharing the same sessions and state.

Config File

You can also configure server settings in your atlas.json config file:

{
  "server": {
    "port": 4096,
    "hostname": "0.0.0.0",
    "mdns": true,
    "cors": ["https://example.com"]
  }
}

Command line flags take precedence over config file settings.