diff --git a/PSMatrix.psd1 b/PSMatrix.psd1
index 9a65448..68b668a 100644
--- a/PSMatrix.psd1
+++ b/PSMatrix.psd1
@@ -71,7 +71,8 @@ PowerShellVersion = '7.0'
 # Functions to export from this module, for best performance, do not use wildcards and do not delete the entry, use an empty array if there are no functions to export.
 FunctionsToExport = @(
     'New-MatrixAccessToken',
-    'Remove-MatrixAccessToken'
+    'Remove-MatrixAccessToken',
+    'Get-MatrixJoinedRooms'
 )
 
 # Cmdlets to export from this module, for best performance, do not use wildcards and do not delete the entry, use an empty array if there are no cmdlets to export.
diff --git a/private/Get-MatrixAuthHeaders.ps1 b/private/Get-MatrixAuthHeaders.ps1
new file mode 100644
index 0000000..a3e2666
--- /dev/null
+++ b/private/Get-MatrixAuthHeaders.ps1
@@ -0,0 +1,10 @@
+function Get-MatrixAuthHeaders {
+    param(
+        [Parameter(Mandatory)]
+        [SecureString]$AccessToken
+    )
+
+    return @{
+        Authorization="Bearer " + ($AccessToken | ConvertFrom-SecureString -AsPlainText)
+    }
+}
\ No newline at end of file
diff --git a/public/Get-MatrixJoinedRooms.ps1 b/public/Get-MatrixJoinedRooms.ps1
new file mode 100644
index 0000000..877cbe9
--- /dev/null
+++ b/public/Get-MatrixJoinedRooms.ps1
@@ -0,0 +1,52 @@
+function Get-MatrixJoinedRooms {
+    param(
+        [Parameter(Mandatory)]
+        [string]$ServerUrl,
+
+        [Parameter(Mandatory)]
+        [SecureString]$AccessToken
+    )
+
+    try {
+        $url = New-MatrixUrl -ServerUrl $ServerUrl -ApiPath "_matrix/client/v3/joined_rooms"
+    }
+    catch {
+        Write-Error $Error[0]
+        return
+    }
+
+    $headers = Get-MatrixAuthHeaders -AccessToken $AccessToken
+
+    $res = Invoke-RestMethod -Uri $url -Headers $headers
+    $rooms = @()
+
+    foreach($roomId in $res.joined_rooms) {
+        $roomAliasUrl = New-MatrixUrl -ServerUrl $ServerUrl -ApiPath "_matrix/client/v3/rooms/$roomId/state/m.room.canonical_alias"
+        $mainAlias = $null
+        $altAliases = @()
+
+        Write-Debug "Retrieving aliases for room ID $roomId via request $roomAliasUrl"
+
+        try {
+            $aliasRes = Invoke-RestMethod -Uri $roomAliasUrl -Headers $headers
+            $mainAlias = $aliasRes.alias
+            $altAliases = $aliasRes.alt_aliases
+            if($null -eq $altAliases) {
+                $altAliases = @()
+            }
+        }
+        catch {
+            # Write-Warning $Error[0]
+        }
+
+        $room = [PSCustomObject]@{
+            RoomID = $roomId
+            MainAlias = $mainAlias
+            AltAliases = $altAliases
+        }
+
+        $rooms += $room
+    }
+
+    return $rooms
+}
\ No newline at end of file