diff --git a/swh/scheduler/backend.py b/swh/scheduler/backend.py
--- a/swh/scheduler/backend.py
+++ b/swh/scheduler/backend.py
@@ -221,11 +221,11 @@
                   for this task type
 
         """
+        keys = [key for key in self.task_type_keys if key in task_type]
         query = self._format_query(
             """insert into task_type ({keys}) values ({placeholders})""",
-            self.task_type_keys,
-        )
-        cursor.execute(query, [task_type[key] for key in self.task_type_keys])
+            keys)
+        cursor.execute(query, keys)
 
     @autocommit
     def get_task_type(self, task_type_name, cursor=None):
diff --git a/swh/scheduler/cli.py b/swh/scheduler/cli.py
--- a/swh/scheduler/cli.py
+++ b/swh/scheduler/cli.py
@@ -70,15 +70,6 @@
     return ''.join(lines)
 
 
-def list_task_types(ctx, param, value):
-    if not value or ctx.resilient_parsing:
-        return
-    click.echo("Known task types:")
-    for tasktype in ctx.obj['scheduler'].get_task_types():
-        click.echo('{type}:\n  {description}'.format(**tasktype))
-    ctx.exit()
-
-
 @click.group(context_settings=CONTEXT_SETTINGS)
 @click.option('--cls', '-c', default='local',
               type=click.Choice(['local', 'remote']),
@@ -124,8 +115,6 @@
 
 
 @cli.group('task')
-@click.option('--list-types', '-l', is_flag=True, default=False, is_eager=True,
-              expose_value=False, callback=list_task_types)
 @click.pass_context
 def task(ctx):
     """Manipulate tasks."""
@@ -461,5 +450,77 @@
     app.run(host, port=port, debug=bool(debug))
 
 
+@cli.group('task-type')
+@click.pass_context
+def task_type(ctx):
+    """Manipulate task types."""
+    pass
+
+
+@task_type.command('list')
+@click.option('--verbose', '-v', is_flag=True, default=False)
+@click.option('--task_type', '-t', multiple=True, default=None,
+              help='List task types of given type')
+@click.option('--task_name', '-n', multiple=True, default=None,
+              help='List task types of given backend task name')
+@click.pass_context
+def list_task_types(ctx, verbose, task_type, task_name):
+    click.echo("Known task types:")
+    if verbose:
+        tmpl = click.style('{type}: ', bold=True) + '''{backend_name}
+  {description}
+  interval: {default_interval} [{min_interval}, {max_interval}]
+  backoff_factor: {backoff_factor}
+  max_queue_length: {max_queue_length}
+  num_retries: {num_retries}
+  retry_delay: {retry_delay}
+'''
+    else:
+        tmpl = '{type}:\n  {description}'
+    for tasktype in ctx.obj['scheduler'].get_task_types():
+        if task_type and tasktype['type'] not in task_type:
+            continue
+        if task_name and tasktype['backend_name'] not in task_name:
+            continue
+        click.echo(tmpl.format(**tasktype))
+
+
+@task_type.command('add')
+@click.argument('type', required=1)
+@click.argument('task-name', required=1)
+@click.argument('description', required=1)
+@click.option('--default-interval', '-i', default='90 days',
+              help='Default interval ("90 days" by default)')
+@click.option('--min-interval', default=None,
+              help='Minimum interval (default interval if not set)')
+@click.option('--max-interval', '-i', default=None,
+              help='Maximal interval (default interval if not set)')
+@click.option('--backoff-factor', '-f', type=float, default=1,
+              help='Backoff factor')
+@click.pass_context
+def add_task_type(ctx, type, task_name, description,
+                  default_interval, min_interval, max_interval,
+                  backoff_factor):
+    """Create a new task type
+    """
+    scheduler = ctx.obj['scheduler']
+    if not scheduler:
+        raise ValueError('Scheduler class (local/remote) must be instantiated')
+    task_type = dict(
+        type=type,
+        backend_name=task_name,
+        description=description,
+        default_interval=default_interval,
+        min_interval=min_interval,
+        max_interval=max_interval,
+        backoff_factor=backoff_factor,
+        max_queue_length=None,
+        num_retries=None,
+        retry_delay=None,
+        )
+    scheduler.create_task_type(task_type)
+    click.echo('OK')
+
+
 if __name__ == '__main__':
     cli()