diff --git a/cylc/flow/network/authorisation.py b/cylc/flow/network/authorisation.py
index 3d4b4b918b5..8440be88d1a 100644
--- a/cylc/flow/network/authorisation.py
+++ b/cylc/flow/network/authorisation.py
@@ -17,8 +17,6 @@
 
 from functools import wraps
 
-from cylc.flow import LOG
-
 
 def authorise():
     """Add authorisation to an endpoint.
@@ -40,17 +38,7 @@ def wrapper(fcn):
         def _call(self, *args, user='?', meta=None, **kwargs):
             if not meta:
                 meta = {}
-            host = meta.get('host', '?')
-            prog = meta.get('prog', '?')
-            comms_method = meta.get('comms_method', '?')
-
-            # Hardcoded, for new - but much of this functionality can be
-            # removed more swingingly.
-            LOG.debug(
-                '[client-command] %s %s://%s@%s:%s',
-                fcn.__name__, comms_method, user, host, prog
-            )
-            return fcn(self, *args, **kwargs)
+            return fcn(self, *args, meta=meta, **kwargs)
 
         return _call
     return wrapper
diff --git a/cylc/flow/network/client.py b/cylc/flow/network/client.py
index 5ac2f309e8f..fde6c8bd620 100644
--- a/cylc/flow/network/client.py
+++ b/cylc/flow/network/client.py
@@ -159,7 +159,13 @@ def _socket_options(self):
         self.poller = zmq.Poller()
         self.poller.register(self.socket, zmq.POLLIN)
 
-    async def async_request(self, command, args=None, timeout=None):
+    async def async_request(
+        self,
+        command,
+        args=None,
+        timeout=None,
+        req_meta=None
+    ):
         """Send an asynchronous request using asyncio.
 
         Has the same arguments and return values as ``serial_request``.
@@ -177,6 +183,9 @@ async def async_request(self, command, args=None, timeout=None):
         # send message
         msg = {'command': command, 'args': args}
         msg.update(self.header)
+        # add the request metadata
+        if req_meta:
+            msg['meta'].update(req_meta)
         LOG.debug('zmq:send %s', msg)
         message = encode_(msg)
         self.socket.send_string(message)
@@ -205,7 +214,13 @@ async def async_request(self, command, args=None, timeout=None):
             error = response['error']
             raise ClientError(error['message'], error.get('traceback'))
 
-    def serial_request(self, command, args=None, timeout=None):
+    def serial_request(
+        self,
+        command,
+        args=None,
+        timeout=None,
+        req_meta=None
+    ):
         """Send a request.
 
         For convenience use ``__call__`` to call this method.
@@ -225,7 +240,7 @@ def serial_request(self, command, args=None, timeout=None):
 
         """
         task = self.loop.create_task(
-            self.async_request(command, args, timeout))
+            self.async_request(command, args, timeout, req_meta))
         self.loop.run_until_complete(task)
         return task.result()
 
diff --git a/cylc/flow/network/resolvers.py b/cylc/flow/network/resolvers.py
index 69d08225a14..08423595250 100644
--- a/cylc/flow/network/resolvers.py
+++ b/cylc/flow/network/resolvers.py
@@ -34,6 +34,7 @@
 from uuid import uuid4
 
 from graphene.utils.str_converters import to_snake_case
+from cylc.flow import LOG
 
 from cylc.flow.data_store_mgr import (
     EDGES, FAMILY_PROXIES, TASK_PROXIES, WORKFLOW,
@@ -592,7 +593,7 @@ def __init__(self, data: 'DataStoreMgr', schd: 'Scheduler') -> None:
     # Mutations
     async def mutator(self, *m_args):
         """Mutate workflow."""
-        _, command, w_args, args = m_args
+        _, command, w_args, args, meta = m_args
         w_ids = [flow[WORKFLOW].id
                  for flow in await self.get_workflows_data(w_args)]
         if not w_ids:
@@ -600,52 +601,13 @@ async def mutator(self, *m_args):
             return [{
                 'response': (False, f'No matching workflow in {workflows}')}]
         w_id = w_ids[0]
-        result = await self._mutation_mapper(command, args)
-        if result is None:
-            result = (True, 'Command queued')
-        return [{'id': w_id, 'response': result}]
-
-    async def nodes_mutator(self, *m_args):
-        """Mutate node items of associated workflows."""
-        _, command, tokens_list, w_args, args = m_args
-        w_ids = [
-            workflow[WORKFLOW].id
-            for workflow in await self.get_workflows_data(w_args)
-        ]
-        if not w_ids:
-            workflows = list(self.data_store_mgr.data.keys())
-            return [{
-                'response': (False, f'No matching workflow in {workflows}')}]
-        w_id = w_ids[0]
-        # match proxy ID args with workflows
-        items = []
-        for tokens in tokens_list:
-            owner = tokens.get('user')
-            workflow = tokens.get('workflow')
-            if workflow and owner is None:
-                owner = "*"
-            if (
-                not (owner and workflow)
-                or fnmatchcase(
-                    w_id,
-                    tokens.workflow_id,
-                )
-            ):
-                items.append(
-                    tokens.relative_id
-                )
-        if items:
-            if command == 'put_messages':
-                args['task_job'] = items[0]
-            else:
-                args['tasks'] = items
-        result = await self._mutation_mapper(command, args)
+        result = await self._mutation_mapper(command, args, meta)
         if result is None:
             result = (True, 'Command queued')
         return [{'id': w_id, 'response': result}]
 
     async def _mutation_mapper(
-        self, command: str, kwargs: Dict[str, Any]
+        self, command: str, kwargs: Dict[str, Any], meta: Dict[str, Any]
     ) -> Optional[Tuple[bool, str]]:
         """Map between GraphQL resolvers and internal command interface."""
         method = getattr(self, command, None)
@@ -655,7 +617,16 @@ async def _mutation_mapper(
             self.schd.get_command_method(command)
         except AttributeError:
             raise ValueError(f"Command '{command}' not found")
-        self.schd.command_queue.put((command, tuple(kwargs.values()), {}))
+        if command != "put_messages":
+            log_msg = f"[command] {command}"
+            user = meta.get('auth_user', self.schd.owner)
+            if user != self.schd.owner:
+                log_msg += (f" (issued by {user})")
+            LOG.info(log_msg)
+        self.schd.queue_command(
+            command,
+            kwargs
+        )
         return None
 
     def broadcast(
@@ -678,7 +649,11 @@ def broadcast(
                 cutoff)
         raise ValueError('Unsupported broadcast mode')
 
-    def put_ext_trigger(self, message, id):  # noqa: A002 (graphql interface)
+    def put_ext_trigger(
+        self,
+        message,
+        id  # noqa: A002 (graphql interface)
+    ):
         """Server-side external event trigger interface.
 
         Args:
@@ -697,7 +672,12 @@ def put_ext_trigger(self, message, id):  # noqa: A002 (graphql interface)
         self.schd.ext_trigger_queue.put((message, id))
         return (True, 'Event queued')
 
-    def put_messages(self, task_job=None, event_time=None, messages=None):
+    def put_messages(
+        self,
+        task_job=None,
+        event_time=None,
+        messages=None
+    ):
         """Put task messages in queue for processing later by the main loop.
 
         Arguments:
@@ -768,7 +748,7 @@ def force_spawn_children(
                 {
                     "outputs": outputs,
                     "flow_num": flow_num
-                }
+                },
             )
         )
         return (True, 'Command queued')
@@ -779,7 +759,7 @@ def stop(
         cycle_point: Optional[str] = None,
         clock_time: Optional[str] = None,
         task: Optional[str] = None,
-        flow_num: Optional[int] = None
+        flow_num: Optional[int] = None,
     ) -> Tuple[bool, str]:
         """Stop the workflow or specific flow from spawning any further.
 
@@ -805,11 +785,17 @@ def stop(
                 'clock_time': clock_time,
                 'task': task,
                 'flow_num': flow_num,
-            })
-        ))
+            }),
+        )
+        )
         return (True, 'Command queued')
 
-    def force_trigger_tasks(self, tasks=None, reflow=False, flow_descr=None):
+    def force_trigger_tasks(
+        self,
+        tasks=None,
+        reflow=False,
+        flow_descr=None,
+    ):
         """Trigger submission of task jobs where possible.
 
         Args:
@@ -831,11 +817,12 @@ def force_trigger_tasks(self, tasks=None, reflow=False, flow_descr=None):
         """
         self.schd.command_queue.put(
             (
-                "force_trigger_tasks", (tasks or [],),
+                "force_trigger_tasks",
+                (tasks or [],),
                 {
                     "reflow": reflow,
                     "flow_descr": flow_descr
                 }
-            )
+            ),
         )
         return (True, 'Command queued')
diff --git a/cylc/flow/network/schema.py b/cylc/flow/network/schema.py
index 9ea498e759f..32e90f4e012 100644
--- a/cylc/flow/network/schema.py
+++ b/cylc/flow/network/schema.py
@@ -1218,38 +1218,8 @@ async def mutator(root, info, command=None, workflows=None,
         args.update(args.get('args', {}))
         args.pop('args')
     resolvers = info.context.get('resolvers')
-    res = await resolvers.mutator(info, command, w_args, args)
-    return GenericResponse(result=res)
-
-
-async def nodes_mutator(root, info, command, ids, workflows=None,
-                        exworkflows=None, **args):
-    """Call the resolver method, dealing with multiple node id arguments,
-    which acts on the workflow service via the internal command queue."""
-    tokens_list = [Tokens(n_id, relative=True) for n_id in ids]
-    # if the workflows arg is empty extract from proxy args
-    if workflows is None:
-        workflows = set()
-        for tokens in tokens_list:
-            workflows.add(tokens.workflow_id)
-    if not workflows:
-        return GenericResponse(result="Error: No given Workflow(s)")
-    if exworkflows is None:
-        exworkflows = []
-    w_args = {}
-    w_args['workflows'] = [Tokens(w_id) for w_id in workflows]
-    w_args['exworkflows'] = [Tokens(w_id) for w_id in exworkflows]
-    if args.get('args', False):
-        args.update(args.get('args', {}))
-        args.pop('args')
-    resolvers = info.context.get('resolvers')
-    res = await resolvers.nodes_mutator(
-        info,
-        command,
-        tokens_list,
-        w_args,
-        args
-    )
+    meta = info.context.get('meta')
+    res = await resolvers.mutator(info, command, w_args, args, meta)
     return GenericResponse(result=res)
 
 # Input types:
diff --git a/cylc/flow/network/server.py b/cylc/flow/network/server.py
index a5502fdaeb9..2347b2548bb 100644
--- a/cylc/flow/network/server.py
+++ b/cylc/flow/network/server.py
@@ -264,7 +264,7 @@ def register_endpoints(self):
 
     @authorise()
     @expose
-    def api(self, endpoint=None):
+    def api(self, endpoint=None, meta=None):
         """Return information about this API.
 
         Returns a list of callable endpoints.
@@ -297,7 +297,7 @@ def api(self, endpoint=None):
 
     @authorise()
     @expose
-    def graphql(self, request_string=None, variables=None):
+    def graphql(self, request_string=None, variables=None, meta=None):
         """Return the GraphQL scheme execution result.
 
         Args:
@@ -315,6 +315,7 @@ def graphql(self, request_string=None, variables=None):
                 variable_values=variables,
                 context={
                     'resolvers': self.resolvers,
+                    'meta': meta or {},
                 },
                 backend=CylcGraphQLBackend(),
                 middleware=list(instantiate_middleware(self.middleware)),
@@ -341,7 +342,7 @@ def graphql(self, request_string=None, variables=None):
     @authorise()
     @expose
     def get_graph_raw(
-            self, start_point_str, stop_point_str, grouping=None
+            self, start_point_str, stop_point_str, grouping=None, meta=None
     ):
         """Return a textual representation of the workflow graph.
 
@@ -386,7 +387,7 @@ def get_graph_raw(
     # UIServer Data Commands
     @authorise()
     @expose
-    def pb_entire_workflow(self):
+    def pb_entire_workflow(self, meta=None):
         """Send the entire data-store in a single Protobuf message.
 
         Returns:
@@ -399,7 +400,7 @@ def pb_entire_workflow(self):
 
     @authorise()
     @expose
-    def pb_data_elements(self, element_type):
+    def pb_data_elements(self, element_type, meta=None):
         """Send the specified data elements in delta form.
 
         Args:
diff --git a/cylc/flow/scheduler.py b/cylc/flow/scheduler.py
index 7ae2b935aca..40955064771 100644
--- a/cylc/flow/scheduler.py
+++ b/cylc/flow/scheduler.py
@@ -823,6 +823,12 @@ def get_command_method(self, command_name):
         """Return a command processing method or raise AttributeError."""
         return getattr(self, f'command_{command_name}')
 
+    def queue_command(self, command, kwargs):
+        self.command_queue.put((
+            command,
+            tuple(kwargs.values()), {}
+        ))
+
     def process_command_queue(self) -> None:
         """Process queued commands."""
         qsize = self.command_queue.qsize()
@@ -831,7 +837,8 @@ def process_command_queue(self) -> None:
         LOG.info(f"Processing {qsize} queued command(s)")
         while True:
             try:
-                name, args, kwargs = self.command_queue.get(False)
+                command = (self.command_queue.get(False))
+                name, args, kwargs = command
             except Empty:
                 break
             args_string = ', '.join(str(a) for a in args)
diff --git a/tests/functional/cylc-message/00-ssh.t b/tests/functional/cylc-message/00-ssh.t
index 9980d349a30..935c35837ae 100755
--- a/tests/functional/cylc-message/00-ssh.t
+++ b/tests/functional/cylc-message/00-ssh.t
@@ -21,7 +21,7 @@
 export REQUIRE_PLATFORM='loc:remote comms:ssh'
 . "$(dirname "$0")/test_header"
 #-------------------------------------------------------------------------------
-set_test_number 3
+set_test_number 2
 install_workflow "${TEST_NAME_BASE}" "${TEST_NAME_BASE}"
 
 run_ok "${TEST_NAME_BASE}-validate" \
@@ -29,8 +29,5 @@ run_ok "${TEST_NAME_BASE}-validate" \
 workflow_run_ok "${TEST_NAME_BASE}-run" \
     cylc play --debug --no-detach --reference-test "${WORKFLOW_NAME}"
 
-grep_ok "\[client-command\] graphql ssh" \
-    "$RUN_DIR/${WORKFLOW_NAME}/log/workflow/log" 
-
 purge
 exit
diff --git a/tests/integration/test_resolvers.py b/tests/integration/test_resolvers.py
index e66924c04a9..2589bd129b1 100644
--- a/tests/integration/test_resolvers.py
+++ b/tests/integration/test_resolvers.py
@@ -202,33 +202,21 @@ async def test_mutator(mock_flow, flow_args):
         'workflow_sel': None
     })
     args = {}
+    meta = {}
     response = await mock_flow.resolvers.mutator(
         None,
         'pause',
         flow_args,
-        args
-    )
-    assert response[0]['id'] == mock_flow.id
-
-
-async def test_nodes_mutator(mock_flow, flow_args):
-    """Test the nodes mutation method."""
-    flow_args['workflows'].append({
-        'user': mock_flow.owner,
-        'workflow': mock_flow.name,
-        'workflow_sel': None,
-    })
-    ids = [Tokens(n) for n in mock_flow.node_ids]
-    response = await mock_flow.resolvers.nodes_mutator(
-        None, 'force_trigger_tasks', ids, flow_args,
-        {"reflow": False, "flow_descr": ""}
+        args,
+        meta
     )
     assert response[0]['id'] == mock_flow.id
 
 
 async def test_mutation_mapper(mock_flow):
     """Test the mapping of mutations to internal command methods."""
-    response = await mock_flow.resolvers._mutation_mapper('pause', {})
+    meta = {}
+    response = await mock_flow.resolvers._mutation_mapper('pause', {}, meta)
     assert response is None
     with pytest.raises(ValueError):
-        await mock_flow.resolvers._mutation_mapper('non_exist', {})
+        await mock_flow.resolvers._mutation_mapper('non_exist', {}, meta)