diff --git a/main.go b/main.go
index d42492b..856eeb2 100644
--- a/main.go
+++ b/main.go
@@ -207,9 +207,24 @@ func cliLeave(ctx context.Context, cmd *cli.Command) error {
 	return cl.SayBye(ctx, chord.Address(n))
 }
 
-func cliLookup(ctx context.Context, cmd *cli.Command) error { return errors.New("not implemented") }
-func cliPut(ctx context.Context, cmd *cli.Command) error    { return errors.New("not implemented") }
-func cliGet(ctx context.Context, cmd *cli.Command) error    { return errors.New("not implemented") }
+func cliLookup(ctx context.Context, cmd *cli.Command) error {
+	n, err := netip.ParseAddrPort(cmd.String("n"))
+	if err != nil {
+		return err
+	}
+	k := chord.Key(cmd.String("k"))
+	cl := &httpnode.Client{HTTP: http.Client{Timeout: 5 * time.Second}}
+	p, err := cl.FindSuccessor(ctx, chord.Address(n), k)
+	if err != nil {
+		return err
+	}
+	_, addr := p.Values()
+	fmt.Println(addr)
+	return nil
+}
+
+func cliPut(ctx context.Context, cmd *cli.Command) error { return errors.New("not implemented") }
+func cliGet(ctx context.Context, cmd *cli.Command) error { return errors.New("not implemented") }
 
 func main() {
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
diff --git a/test.bash b/test.bash
index 30021b8..cfbc866 100755
--- a/test.bash
+++ b/test.bash
@@ -17,6 +17,15 @@ THIRD=$!
 sleep 5
 # Each node logs its predecessor and successors. At this point, we see the ring.
 
+# Test lookup.
+# First check that the lookup is independent of the node we ask.
+./chord-node lookup -k key1 -n 127.0.0.1:3000
+./chord-node lookup -k key1 -n 127.0.0.1:3001
+./chord-node lookup -k key1 -n 127.0.0.1:3002
+# Now check that we get some different nodes for different keys.
+./chord-node lookup -k key2 -n 127.0.0.1:3000
+./chord-node lookup -k key3 -n 127.0.0.1:3000
+
 # Test leaving.
 ./chord-node leave -n 127.0.0.1:3000