diff --git a/configuration/configuration.go b/configuration/configuration.go
index 5ef93c4..5a299a1 100644
--- a/configuration/configuration.go
+++ b/configuration/configuration.go
@@ -63,6 +63,10 @@ func (c *Configuration) Validate() error {
 		if !(u.Scheme == "http" || u.Scheme == "https") {
 			return fmt.Errorf("PVE host '%s' must be protocol type of HTTP or HTTPS.", host)
 		}
+
+		if u.Hostname() == "" {
+			return fmt.Errorf("PVE host '%s' must contain an IP address or DNS name.", host)
+		}
 	}
 
 	// Validate PVE token
diff --git a/configuration/configuration_test.go b/configuration/configuration_test.go
new file mode 100644
index 0000000..89c536d
--- /dev/null
+++ b/configuration/configuration_test.go
@@ -0,0 +1,32 @@
+package configuration
+
+import "testing"
+
+func TestConfigurationValidateAcceptsIPAndDNSPveHosts(t *testing.T) {
+	tests := []struct {
+		name string
+		host string
+	}{
+		{name: "IP address", host: "https://192.168.0.10:8006"},
+		{name: "DNS name", host: "https://pve.example.com:8006"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			configuration := Configuration{
+				Host: "0.0.0.0",
+				PVE: PveConfiguration{
+					Hosts: []string{tt.host},
+					Token: PveTokenConfiguration{
+						TokenId: "token",
+						Secret:  "secret",
+					},
+				},
+			}
+
+			if err := configuration.Validate(); err != nil {
+				t.Fatalf("Validate() rejected %s host %q: %v", tt.name, tt.host, err)
+			}
+		})
+	}
+}
diff --git a/proxmox/api_client.go b/proxmox/api_client.go
index 1f5832d..a72f067 100644
--- a/proxmox/api_client.go
+++ b/proxmox/api_client.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"strings"
 	"sync"
 	"time"
 
@@ -55,7 +56,7 @@ func NewApiClient(endpoints []string, tokenId string, secret string, checkInterv
 	// Prepare API endpoints.
 	for _, endpoint := range endpoints {
 		apiEndpoint := ApiEndpoint{
-			host:  endpoint,
+			host:  normalizeApiHost(endpoint),
 			alive: false,
 		}
 		instance.endpoints = append(instance.endpoints, &apiEndpoint)
@@ -86,6 +87,11 @@ func NewApiClient(endpoints []string, tokenId string, secret string, checkInterv
 	return &instance
 }
 
+// normalizeApiHost ensures API paths can be appended to either IP- or DNS-based hosts.
+func normalizeApiHost(host string) string {
+	return strings.TrimRight(strings.TrimSpace(host), "/") + "/"
+}
+
 // Check endpoint liveness state.
 func (instance *ApiClient) checkEndpointsLiveness() {
 	// We want to make sure other routines won't make any requests until we have checked for alive connections.
diff --git a/proxmox/api_client_test.go b/proxmox/api_client_test.go
new file mode 100644
index 0000000..3f9ff46
--- /dev/null
+++ b/proxmox/api_client_test.go
@@ -0,0 +1,49 @@
+package proxmox
+
+import (
+	"testing"
+	"time"
+)
+
+func TestNewApiClientNormalizesEndpointHosts(t *testing.T) {
+	tests := []struct {
+		name string
+		host string
+		want string
+	}{
+		{
+			name: "IP without trailing slash",
+			host: "https://192.168.0.10:8006",
+			want: "https://192.168.0.10:8006/",
+		},
+		{
+			name: "IP with trailing slash",
+			host: "https://192.168.0.10:8006/",
+			want: "https://192.168.0.10:8006/",
+		},
+		{
+			name: "DNS without trailing slash",
+			host: "https://pve.example.com:8006",
+			want: "https://pve.example.com:8006/",
+		},
+		{
+			name: "DNS with trailing slash",
+			host: "https://pve.example.com:8006/",
+			want: "https://pve.example.com:8006/",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			client := NewApiClient([]string{tt.host}, "token", "secret", time.Second)
+			defer client.httpClient.CloseIdleConnections()
+
+			if got := client.endpoints[0].host; got != tt.want {
+				t.Fatalf("normalized endpoint host = %q, want %q", got, tt.want)
+			}
+			if got := client.endpoints[0].host + "api2/json/"; got != tt.want+"api2/json/" {
+				t.Fatalf("liveness URL = %q, want %q", got, tt.want+"api2/json/")
+			}
+		})
+	}
+}