diff --git a/README.md b/README.md
index 4b50d7f..37429a4 100644
--- a/README.md
+++ b/README.md
@@ -169,6 +169,7 @@ make run
 | Enter | SSH into selected server      |
 | c     | Copy SSH command to clipboard |
 | g     | Ping selected server          |
+| K     | Install SSH Key (authorized_keys) |
 | r     | Refresh background data       |
 | a     | Add server                    |
 | e     | Edit server                   |
@@ -246,4 +247,3 @@ If you find Lazyssh useful, please consider giving the repo a **star** ⭐️ an
 
 - Built with [tview](https://github.com/rivo/tview) and [tcell](https://github.com/gdamore/tcell).
 - Inspired by [k9s](https://github.com/derailed/k9s) and [lazydocker](https://github.com/jesseduffield/lazydocker).
-
diff --git a/internal/adapters/ui/handlers.go b/internal/adapters/ui/handlers.go
index 7b1becd..8668fa9 100644
--- a/internal/adapters/ui/handlers.go
+++ b/internal/adapters/ui/handlers.go
@@ -78,6 +78,9 @@ func (t *tui) handleGlobalKeys(event *tcell.EventKey) *tcell.EventKey {
 	case 'k':
 		t.handleNavigateUp()
 		return nil
+	case 'K':
+		t.handleInstallSSHKey()
+		return nil
 	}
 
 	if event.Key() == tcell.KeyEnter {
@@ -256,6 +259,17 @@ func (t *tui) handlePingSelected() {
 	}
 }
 
+func (t *tui) handleInstallSSHKey() {
+	if server, ok := t.serverList.GetSelectedServer(); ok {
+		alias := server.Alias
+		t.showStatusTemp(fmt.Sprintf("Installing key to %s…", alias))
+		t.app.Suspend(func() {
+			_ = t.serverService.CopySSHKey(alias)
+		})
+		t.refreshServerList()
+	}
+}
+
 func (t *tui) handleModalClose() {
 	t.returnToMain()
 }
diff --git a/internal/adapters/ui/hint_bar.go b/internal/adapters/ui/hint_bar.go
index de94973..a7c445c 100644
--- a/internal/adapters/ui/hint_bar.go
+++ b/internal/adapters/ui/hint_bar.go
@@ -22,6 +22,6 @@ import (
 func NewHintBar() *tview.TextView {
 	hint := tview.NewTextView().SetDynamicColors(true)
 	hint.SetBackgroundColor(tcell.Color233)
-	hint.SetText("[#BBBBBB]Press [::b]/[-:-:b] to search…  •  ↑↓ Navigate  •  Enter SSH  •  c Copy SSH  •  g Ping  •  r Refresh  •  a Add  •  e Edit  •  t Tags  •  d Delete  •  p Pin/Unpin  •  s Sort[-]")
+	hint.SetText("[#BBBBBB]Press [::b]/[-:-:b] to search…  •  ↑↓ Navigate  •  Enter SSH  •  c Copy SSH  •  g Ping  •  K Install Key  •  r Refresh  •  a Add  •  e Edit  •  t Tags  •  d Delete  •  p Pin/Unpin  •  s Sort[-]")
 	return hint
 }
diff --git a/internal/adapters/ui/server_details.go b/internal/adapters/ui/server_details.go
index 8e0a634..6f82a32 100644
--- a/internal/adapters/ui/server_details.go
+++ b/internal/adapters/ui/server_details.go
@@ -213,7 +213,7 @@ func (sd *ServerDetails) UpdateServer(server domain.Server) {
 	}
 
 	// Commands list
-	text += "\n[::b]Commands:[-]\n  Enter: SSH connect\n  c: Copy SSH command\n  g: Ping server\n  r: Refresh list\n  a: Add new server\n  e: Edit entry\n  t: Edit tags\n  d: Delete entry\n  p: Pin/Unpin"
+	text += "\n[::b]Commands:[-]\n  Enter: SSH connect\n  c: Copy SSH command\n  g: Ping server\n  K: Install SSH Key\n  r: Refresh list\n  a: Add new server\n  e: Edit entry\n  t: Edit tags\n  d: Delete entry\n  p: Pin/Unpin"
 
 	sd.TextView.SetText(text)
 }
diff --git a/internal/core/ports/services.go b/internal/core/ports/services.go
index 9394751..e9aa1aa 100644
--- a/internal/core/ports/services.go
+++ b/internal/core/ports/services.go
@@ -27,5 +27,6 @@ type ServerService interface {
 	DeleteServer(server domain.Server) error
 	SetPinned(alias string, pinned bool) error
 	SSH(alias string) error
+	CopySSHKey(alias string) error
 	Ping(server domain.Server) (bool, time.Duration, error)
 }
diff --git a/internal/core/services/server_service.go b/internal/core/services/server_service.go
index c01b18b..b4542f0 100644
--- a/internal/core/services/server_service.go
+++ b/internal/core/services/server_service.go
@@ -168,6 +168,29 @@ func (s *serverService) SSH(alias string) error {
 	return nil
 }
 
+func (s *serverService) CopySSHKey(alias string) error {
+	s.logger.Infow("ssh-copy-id start", "alias", alias)
+
+	// Ensure ssh-copy-id exists on PATH
+	if _, err := exec.LookPath("ssh-copy-id"); err != nil {
+		s.logger.Errorw("ssh-copy-id missing", "error", err)
+		return fmt.Errorf("ssh-copy-id not found; install OpenSSH (e.g., brew install openssh)")
+	}
+
+	cmd := exec.Command("ssh-copy-id", alias)
+
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	if err := cmd.Run(); err != nil {
+		s.logger.Errorw("ssh-copy-id failed", "alias", alias, "error", err)
+		return err
+	}
+
+	s.logger.Infow("ssh-copy-id end", "alias", alias)
+	return nil
+}
+
 // Ping checks if the server is reachable on its SSH port.
 func (s *serverService) Ping(server domain.Server) (bool, time.Duration, error) {
 	start := time.Now()