diff --git a/cmd/signaldctl/cmd/group/join/join.go b/cmd/signaldctl/cmd/group/join/join.go
new file mode 100644
index 0000000..c528244
--- /dev/null
+++ b/cmd/signaldctl/cmd/group/join/join.go
@@ -0,0 +1,111 @@
+// Copyright © 2021 Finn Herzfeld <finn@janky.solutions>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+package join
+
+import (
+	"encoding/json"
+	"log"
+	"os"
+
+	"github.com/jedib0t/go-pretty/v6/table"
+	"github.com/spf13/cobra"
+	"gopkg.in/yaml.v2"
+
+	"gitlab.com/signald/signald-go/cmd/signaldctl/common"
+	"gitlab.com/signald/signald-go/cmd/signaldctl/config"
+	"gitlab.com/signald/signald-go/signald/client-protocol/v1"
+)
+
+var (
+	account string
+	url     string
+
+	JoinGroupCmd = &cobra.Command{
+		Use:   "join <url>",
+		Short: "join a group by URL",
+		PreRun: func(cmd *cobra.Command, args []string) {
+			if account == "" {
+				account = config.Config.DefaultAccount
+			}
+			if account == "" {
+				common.Must(cmd.Help())
+				log.Fatal("No account specified. Please specify with --account or set a default")
+			}
+			if len(args) < 1 {
+				common.Must(cmd.Help())
+				log.Fatal("must specify group url")
+			}
+			url = args[0]
+		},
+		Run: func(_ *cobra.Command, args []string) {
+			go common.Signald.Listen(nil)
+			req := v1.JoinGroupRequest{
+				Account: account,
+				Uri:     url,
+			}
+
+			resp, err := req.Submit(common.Signald)
+			if err != nil {
+				log.Fatal(err, "error communicating with signald")
+			}
+
+			if resp.PendingAdminApproval {
+				log.Println("requested to join pending admin approval")
+			} else {
+				log.Println("joined group")
+			}
+
+			switch common.OutputFormat {
+			case common.OutputFormatJSON:
+				err := json.NewEncoder(os.Stdout).Encode(resp)
+				if err != nil {
+					log.Fatal(err, "error encoding response to stdout")
+				}
+			case common.OutputFormatYAML:
+				err := yaml.NewEncoder(os.Stdout).Encode(resp)
+				if err != nil {
+					log.Fatal(err, "error encoding response to stdout")
+				}
+			case common.OutputFormatCSV, common.OutputFormatTable:
+				t := table.NewWriter()
+				t.SetOutputMirror(os.Stdout)
+				t.AppendRows([]table.Row{
+					{"Group ID", resp.GroupID},
+					{"Revision", resp.Revision},
+					{"Title", resp.Title},
+					{"Description", resp.Description},
+					{"Members", resp.MemberCount},
+					{"Awaiting approval", resp.PendingAdminApproval},
+				})
+
+				if common.OutputFormat == common.OutputFormatCSV {
+					t.RenderCSV()
+				} else {
+					common.StylizeTable(t)
+					t.Render()
+				}
+			case common.OutputFormatQuiet, common.OutputFormatDefault:
+				return
+			default:
+				log.Fatal("Unsupported output format")
+			}
+		},
+	}
+)
+
+func init() {
+	JoinGroupCmd.Flags().StringVarP(&account, "account", "a", "", "the signald account to use")
+}
diff --git a/cmd/signaldctl/cmd/group/root.go b/cmd/signaldctl/cmd/group/root.go
index 7e23c97..3f7d0ea 100644
--- a/cmd/signaldctl/cmd/group/root.go
+++ b/cmd/signaldctl/cmd/group/root.go
@@ -21,6 +21,7 @@ import (
 	"gitlab.com/signald/signald-go/cmd/signaldctl/cmd/group/accept"
 	"gitlab.com/signald/signald-go/cmd/signaldctl/cmd/group/addmember"
 	"gitlab.com/signald/signald-go/cmd/signaldctl/cmd/group/create"
+	"gitlab.com/signald/signald-go/cmd/signaldctl/cmd/group/join"
 	"gitlab.com/signald/signald-go/cmd/signaldctl/cmd/group/leave"
 	"gitlab.com/signald/signald-go/cmd/signaldctl/cmd/group/list"
 	"gitlab.com/signald/signald-go/cmd/signaldctl/cmd/group/removemember"
@@ -37,6 +38,7 @@ func init() {
 	GroupCmd.AddCommand(accept.AcceptGroupInvitationCmd)
 	GroupCmd.AddCommand(addmember.AddGroupMembersCmd)
 	GroupCmd.AddCommand(create.CreateGroupCmd)
+	GroupCmd.AddCommand(join.JoinGroupCmd)
 	GroupCmd.AddCommand(leave.LeaveGroupCmd)
 	GroupCmd.AddCommand(list.ListGroupCmd)
 	GroupCmd.AddCommand(removemember.RemoveMemberCmd)