diff --git a/client/main.go b/client/main.go
index 1a2662d..2699b72 100644
--- a/client/main.go
+++ b/client/main.go
@@ -1,5 +1,5 @@
-// tether-client: connects to a tether-server, prints messages to stdout.
-// MVP — does not yet touch the OS clipboard.
+// tether-client: connects to a tether-server, writes incoming messages
+// to the OS clipboard and prints them to stdout.
 package main
 
 import (
@@ -14,6 +14,13 @@ import (
 	"os"
 	"strings"
 	"time"
+
+	"github.com/atotto/clipboard"
+)
+
+var (
+	noClipboard bool
+	myLabel     string
 )
 
 type Message struct {
@@ -26,13 +33,20 @@ func main() {
 	server := flag.String("server", "http://localhost:8765", "tether-server base URL")
 	label := flag.String("label", "linux-client", "X-Tether-Client label")
 	sendText := flag.String("send", "", "send this text and exit (otherwise listen)")
+	flag.BoolVar(&noClipboard, "no-clipboard", false, "don't write incoming messages to the OS clipboard")
 	flag.Parse()
+	myLabel = *label
 
 	if *sendText != "" {
 		send(*server, *label, *sendText)
 		return
 	}
 
+	if !noClipboard && clipboard.Unsupported {
+		fmt.Fprintln(os.Stderr, "tether-client: OS clipboard unsupported on this platform; falling back to stdout-only")
+		noClipboard = true
+	}
+
 	for {
 		if err := listen(*server, *label); err != nil {
 			log.Printf("stream error: %v — reconnecting in 3s", err)
@@ -85,6 +99,14 @@ func listen(server, label string) error {
 				if err := json.Unmarshal([]byte(data), &m); err == nil {
 					ts := time.UnixMilli(m.TS).Format("15:04:05")
 					fmt.Printf("\n──────  %s  from %s  ──────\n%s\n", ts, m.Source, m.Text)
+					// Don't echo our own message back into our own clipboard
+					if !noClipboard && m.Source != myLabel {
+						if err := clipboard.WriteAll(m.Text); err != nil {
+							fmt.Fprintf(os.Stderr, "  ! clipboard write error: %v\n", err)
+						} else {
+							fmt.Fprintln(os.Stderr, "  → clipboard updated")
+						}
+					}
 				}
 			}
 			ev, data = "", ""
diff --git a/go.mod b/go.mod
index 78fdef5..7b4be4e 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,5 @@
 module github.com/pecord/tether
 
 go 1.22
+
+require github.com/atotto/clipboard v0.1.4
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..244b67e
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
+github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=