diff --git a/src/gotosocial/register.py b/src/gotosocial/register.py
index 4351d6a..4b802ed 100644
--- a/src/gotosocial/register.py
+++ b/src/gotosocial/register.py
@@ -38,6 +38,11 @@ class Application:
             with open(app_json, "w") as jfh:
                 json.dump(json_r, jfh, indent=2)
                 print(f"Wrote response to {app_json}")
+            auth_url = f"{self.base_url}/oauth/authorize?client_id={self.client_id}&redirect_uri=urn:ietf:wg:oauth:2.0:oob&response_type=code&scope={self.scopes}"
+            print("Visit this URL in a private browser window to authenticate:")
+            print(auth_url)
+            print("\nThen run this script again with the OOB token, like:")
+            print("> uv run register -u {self.base_ur} -n {self.name} -t OOB_TOKEB")
             return True
         except Exception as e:
             print("Something went wrong:")
@@ -45,15 +50,63 @@ class Application:
             print(data)
             return False
 
+    def get_auth_token(self, token):
+        app_json = Path(f"./{self.name}_app.json")
+        if not app_json.is_file():
+            print(f"No {app_json} file found")
+            print("You need to register the app before getting a token")
+            return False
+        try:
+            with open(app_json, "r") as jfh:
+                cf = json.load(jfh)
+            data = {
+                "client_id": cf["client_id"],
+                "client_secret": cf["client_secret"],
+                "redirect_uri": "urn:ietf:wg:oauth:2.0:oob",
+                "grant_type": "authorization_code",
+                "code": token,
+            }
+            response = requests.post(
+                f"{self.base_url}/oauth/token",
+                data=json.dumps(data),
+                headers=self.headers,
+            )
+            response.raise_for_status()
+            json_r = response.json()
+            access_token = json_r["access_token"]
+            print(f"Got access token: {access_token}")
+            at_json = self.unique_at_file()
+            with open(at_json, "w") as jfh:
+                json.dump(json_r, jfh, indent=2)
+                print(f"Wrote response to {at_json}")
+        except Exception as e:
+            print("Something went wrong:")
+            print(e)
+            print(data)
+            return False
+
+    def unique_at_file(self):
+        fn = f"./{self.name}_at.json"
+        n = 0
+        while Path(fn).is_file():
+            print(f"File {fn} already exists")
+            n += 1
+            fn = f"./{self.name}_at_{n}.json"
+        return fn
+
 
 def cli():
     ap = argparse.ArgumentParser()
     ap.add_argument("-u", "--url", required=True, type=str, help="GoToSocial server")
     ap.add_argument("-n", "--name", required=True, type=str, help="Application name")
     ap.add_argument("-s", "--scopes", default="write", type=str, help="Scope")
+    ap.add_argument("-t", "--token", type=str, help="OOB token")
     args = ap.parse_args()
     app = Application(args.url, args.name, args.scopes)
-    app.register()
+    if args.token:
+        app.get_auth_token(args.token)
+    else:
+        app.register()
 
 
 if __name__ == "__main__":