diff --git a/lxc/completion.go b/lxc/completion.go
index d115eba5c9bb..65a5ade7f859 100644
--- a/lxc/completion.go
+++ b/lxc/completion.go
@@ -211,6 +211,18 @@ func (g *cmdGlobal) cmpImages(toComplete string) ([]string, cobra.ShellCompDirec
 }
 
 func (g *cmdGlobal) cmpInstanceAllKeys(instanceName string) ([]string, cobra.ShellCompDirective) {
+	var keys []string
+	cmpDirectives := cobra.ShellCompDirectiveNoFileComp
+
+	_, instanceNameOnly, _ := strings.Cut(instanceName, ":")
+	if instanceNameOnly == "" {
+		serverKeys, directives := g.cmpServerAllKeys(instanceName)
+		keys = append(keys, serverKeys...)
+		cmpDirectives = directives
+
+		return keys, cmpDirectives
+	}
+
 	resources, err := g.ParseServers(instanceName)
 	if err != nil || len(resources) == 0 {
 		return nil, cobra.ShellCompDirectiveError
@@ -219,13 +231,12 @@ func (g *cmdGlobal) cmpInstanceAllKeys(instanceName string) ([]string, cobra.She
 	resource := resources[0]
 	client := resource.server
 
-	instanceNameOnly, _, err := client.GetInstance(instanceName)
+	instance, _, err := client.GetInstance(instanceNameOnly)
 	if err != nil {
 		return nil, cobra.ShellCompDirectiveError
 	}
 
-	var keys []string
-	instanceType := instanceNameOnly.Type
+	instanceType := instance.Type
 
 	if instanceType == "container" {
 		for k := range instancetype.InstanceConfigKeysContainer {
@@ -241,6 +252,63 @@ func (g *cmdGlobal) cmpInstanceAllKeys(instanceName string) ([]string, cobra.She
 		keys = append(keys, k)
 	}
 
+	return keys, cmpDirectives
+}
+
+func (g *cmdGlobal) cmpServerAllKeys(instanceName string) ([]string, cobra.ShellCompDirective) {
+	var keys []string
+
+	resources, err := g.ParseServers(instanceName)
+	if err != nil || len(resources) == 0 {
+		return nil, cobra.ShellCompDirectiveError
+	}
+
+	resource := resources[0]
+	client := resource.server
+
+	config, err := client.GetMetadataConfiguration()
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+
+	metadata, ok := (*config)["metadata"].(map[string]any)
+	if !ok {
+		return nil, cobra.ShellCompDirectiveError
+	}
+
+	configs, ok := metadata["configs"].(map[string]any)
+	if !ok {
+		return nil, cobra.ShellCompDirectiveError
+	}
+
+	server, ok := configs["server"].(map[string]any)
+	if !ok {
+		return nil, cobra.ShellCompDirectiveError
+	}
+
+	for _, field := range server {
+		fieldMap, ok := field.(map[string]any)
+		if !ok {
+			return nil, cobra.ShellCompDirectiveError
+		}
+
+		keyArray, ok := fieldMap["keys"].([]any)
+		if !ok {
+			return nil, cobra.ShellCompDirectiveError
+		}
+
+		for _, keyObj := range keyArray {
+			keyMap, ok := keyObj.(map[string]any)
+			if !ok {
+				return nil, cobra.ShellCompDirectiveError
+			}
+
+			for k := range keyMap {
+				keys = append(keys, k)
+			}
+		}
+	}
+
 	return keys, cobra.ShellCompDirectiveNoFileComp
 }
 
@@ -937,6 +1005,10 @@ func (g *cmdGlobal) cmpRemotes(includeAll bool) ([]string, cobra.ShellCompDirect
 			continue
 		}
 
+		if remoteName == "local" || rc.Protocol == "simplestreams" {
+			continue
+		}
+
 		results = append(results, fmt.Sprintf("%s:", remoteName))
 	}
 
diff --git a/lxc/config.go b/lxc/config.go
index 837c1a3616e8..3c22c89c9569 100644
--- a/lxc/config.go
+++ b/lxc/config.go
@@ -400,6 +400,10 @@ func (c *cmdConfigGet) command() *cobra.Command {
 
 	cmd.ValidArgsFunction = func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
 		if len(args) == 0 {
+			if strings.Contains(toComplete, ".") {
+				return c.global.cmpServerAllKeys(toComplete)
+			} 
+
 			return c.global.cmpInstances(toComplete)
 		}
 
@@ -553,6 +557,10 @@ lxc config set core.https_address=[::]:8443
 
 	cmd.ValidArgsFunction = func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
 		if len(args) == 0 {
+			if strings.Contains(toComplete, ".") {
+				return c.global.cmpServerAllKeys(toComplete)
+			}
+
 			return c.global.cmpInstances(toComplete)
 		}
 
@@ -902,6 +910,10 @@ func (c *cmdConfigUnset) command() *cobra.Command {
 
 	cmd.ValidArgsFunction = func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
 		if len(args) == 0 {
+			if strings.Contains(toComplete, ".") {
+				return c.global.cmpServerAllKeys(toComplete)
+			}
+
 			return c.global.cmpInstances(toComplete)
 		}