diff --git a/chimerapy/engine/exceptions.py b/chimerapy/engine/exceptions.py
index 2c68ac2..aa3956d 100644
--- a/chimerapy/engine/exceptions.py
+++ b/chimerapy/engine/exceptions.py
@@ -1,2 +1,6 @@
 class CommitGraphError(Exception):
     ...
+
+
+class TagError(Exception):
+    ...
diff --git a/chimerapy/engine/manager/events.py b/chimerapy/engine/manager/events.py
index e85bf8b..89d93e4 100644
--- a/chimerapy/engine/manager/events.py
+++ b/chimerapy/engine/manager/events.py
@@ -1,3 +1,4 @@
+from typing import Optional
 from dataclasses import dataclass
 
 from ..states import WorkerState
@@ -38,3 +39,10 @@ class DeregisterEntityEvent:  # entity_deregister
 @dataclass
 class MoveTransferredFilesEvent:  # move_transferred_files
     worker_state: WorkerState
+
+
+@dataclass
+class TagEvent:
+    uuid: str
+    name: str
+    description: Optional[str] = None
diff --git a/chimerapy/engine/manager/manager.py b/chimerapy/engine/manager/manager.py
index 517412e..27fdc40 100644
--- a/chimerapy/engine/manager/manager.py
+++ b/chimerapy/engine/manager/manager.py
@@ -12,6 +12,7 @@
 from ..networking.async_loop_thread import AsyncLoopThread
 from chimerapy.engine.states import ManagerState, WorkerState
 from chimerapy.engine.graph import Graph
+from chimerapy.engine.exceptions import TagError
 
 # Eventbus
 from ..eventbus import EventBus, Event, make_evented
@@ -24,6 +25,7 @@
 from .zeroconf_service import ZeroconfService
 from .session_record_service import SessionRecordService
 from .distributed_logging_service import DistributedLoggingService
+from .session_tag_service import SessionTagService
 
 logger = _logger.getLogger("chimerapy-engine")
 
@@ -107,6 +109,11 @@ def __init__(
             eventbus=self.eventbus,
             state=self.state,
         )
+        self.session_tags = SessionTagService(
+            name="session_tag",
+            eventbus=self.eventbus,
+            state=self.state,
+        )
         self.distributed_logging = DistributedLoggingService(
             name="distributed_logging",
             publish_logs_via_zmq=publish_logs_via_zmq,
@@ -338,6 +345,27 @@ async def async_shutdown(self) -> bool:
 
         return True
 
+    async def async_create_tag(
+        self, name: str, description: Optional[str] = None
+    ) -> str:
+        can, reason = self.session_tags.can_create_tag()
+        if can:
+            return await self.worker_handler.create_tag(
+                name=name, description=description
+            )
+        else:
+            raise TagError(reason)
+
+    async def async_update_tag_descr(self, tag_id, description) -> bool:
+        tag_name = self.session_tags.get_tag_name(tag_id)
+
+        if tag_name is None:
+            raise TagError(f"Tag with id {tag_id} not found")
+
+        return await self.worker_handler.update_tag_description(
+            tag_id, tag_name, description
+        )
+
     ####################################################################
     ## Front-facing Sync API
     ####################################################################
@@ -476,6 +504,12 @@ def reset(
 
         return future
 
+    def create_tag(self, name: str, description: Optional[str] = None) -> Future[str]:
+        return self._exec_coro(self.async_create_tag(name, description))
+
+    def update_tag_descr(self, tag_id, description) -> Future[bool]:
+        return self._exec_coro(self.async_update_tag_descr(tag_id, description))
+
     def shutdown(self, blocking: bool = True) -> Union[bool, Future[bool]]:
         """Proper shutting down ChimeraPy-Engine cluster.
 
diff --git a/chimerapy/engine/manager/session_tag_service.py b/chimerapy/engine/manager/session_tag_service.py
new file mode 100644
index 0000000..1a3fc0c
--- /dev/null
+++ b/chimerapy/engine/manager/session_tag_service.py
@@ -0,0 +1,104 @@
+import datetime
+import json
+from typing import Optional, Dict, Tuple
+
+from ..states import ManagerState
+from ..eventbus import EventBus, TypedObserver
+from ..service import Service
+from .events import TagEvent
+
+
+class SessionTagService(Service):
+    def __init__(
+        self,
+        name: str,
+        eventbus: EventBus,
+        state: ManagerState,
+    ):
+        super().__init__(name=name)
+
+        # Input parameters
+        self.eventbus = eventbus
+        self.state = state
+
+        # State information
+        self.start_time: Optional[datetime.datetime] = None
+        self.tags: Dict[str, Dict] = {}
+
+        # Specify observers
+        self.observers: Dict[str, TypedObserver] = {
+            "start_recording": TypedObserver(
+                "start_recording", on_asend=self._record_start_time, handle_event="drop"
+            ),
+            "create_tag": TypedObserver(
+                "create_tag",
+                event_data_cls=TagEvent,
+                on_asend=self._create_tag,
+                handle_event="unpack",
+            ),
+            "update_tag": TypedObserver(
+                "update_tag",
+                event_data_cls=TagEvent,
+                on_asend=self._update_tag,
+                handle_event="unpack",
+            ),
+            "stop_recording": TypedObserver(
+                "stop_recording", on_asend=self._consolidate_tags, handle_event="drop"
+            ),
+        }
+        for ob in self.observers.values():
+            self.eventbus.subscribe(ob).result(timeout=1)
+
+    def can_create_tag(self) -> Tuple[bool, Optional[str]]:
+        """Check if a tag can be created"""
+        all_node_states = list(
+            node_state.fsm
+            for worker in self.state.workers.values()
+            for node_state in worker.nodes.values()
+        )
+
+        if len(all_node_states) == 0:
+            return False, "No nodes to tag"
+
+        can_create = all(node_state == "RECORDING" for node_state in all_node_states)
+        reason = (
+            "All nodes must be in RECORDING state to add a tag"
+            if not can_create
+            else None
+        )
+        return can_create, reason
+
+    def _record_start_time(self) -> None:
+        self.start_time = datetime.datetime.now()
+
+    def _get_elapsed_time(self) -> float:
+        assert self.start_time is not None
+        delta = datetime.datetime.now() - self.start_time
+        return delta.total_seconds()
+
+    def _create_tag(self, uuid: str, name: str, description: Optional[str] = None):
+        e_time = self._get_elapsed_time()
+        self.tags[uuid] = {
+            "uuid": uuid,
+            "name": name,
+            "description": description,
+            "timestamp": e_time,
+            "timestamp_str": f"{e_time // 3600} Hours, "
+            f"{(e_time // 60) % 60} Minutes, "
+            f"{e_time % 60} Seconds",
+        }
+
+    def _update_tag(self, uuid, name, description):
+        if uuid in self.tags:
+            self.tags[uuid]["name"] = name
+            self.tags[uuid]["description"] = description
+
+    def get_tag_name(self, uuid: str) -> Optional[str]:
+        if uuid in self.tags:
+            return self.tags[uuid]["name"]
+        else:
+            return None
+
+    def _consolidate_tags(self) -> None:
+        with (self.state.logdir / "session_tags.json").open("w") as f:
+            json.dump(self.tags, f, indent=2)
diff --git a/chimerapy/engine/manager/worker_handler_service.py b/chimerapy/engine/manager/worker_handler_service.py
index 1b8f33f..8f55c46 100644
--- a/chimerapy/engine/manager/worker_handler_service.py
+++ b/chimerapy/engine/manager/worker_handler_service.py
@@ -11,6 +11,7 @@
 import aiohttp
 import networkx as nx
 
+from uuid import uuid4
 from chimerapy.engine import config
 from chimerapy.engine import _logger
 from ..utils import async_waiting_for
@@ -29,6 +30,7 @@
     DeregisterEntityEvent,
     MoveTransferredFilesEvent,
     UpdateSendArchiveEvent,
+    TagEvent,
 )
 
 logger = _logger.getLogger("chimerapy-engine")
@@ -850,3 +852,15 @@ async def reset(self, keep_workers: bool = True):
         self._deregister_graph()
 
         return all(results)
+
+    async def create_tag(self, name, description=None) -> str:
+        # TODO: Ping Nodes
+        tag_event = TagEvent(uuid=str(uuid4()), name=name, description=description)
+        await self.eventbus.asend(Event("create_tag", tag_event))
+        return tag_event.uuid
+
+    async def update_tag_description(self, uuid, name, description) -> bool:
+        tag_event = TagEvent(uuid=uuid, name=name, description=description)
+
+        await self.eventbus.asend(Event("update_tag", tag_event))
+        return True
diff --git a/test/manager/test_manager.py b/test/manager/test_manager.py
index 0b6318e..911caf3 100644
--- a/test/manager/test_manager.py
+++ b/test/manager/test_manager.py
@@ -1,6 +1,7 @@
 import time
 import os
 import pathlib
+import json
 
 import pytest
 
@@ -156,3 +157,38 @@ def test_manager_recommit_graph(self, manager_with_worker):
         assert ((delta2 - delta) / (delta)) < 1
 
         manager.reset()
+
+    def test_manager_session_tags(self, manager_with_worker):
+        manager, worker = manager_with_worker
+
+        # Define graph
+        gen_node = GenNode(name="Gen1")
+        con_node = ConsumeNode(name="Con1")
+        simple_graph = cpe.Graph()
+        simple_graph.add_nodes_from([gen_node, con_node])
+        simple_graph.add_edge(src=gen_node, dst=con_node)
+
+        mapping = {worker.id: [gen_node.id, con_node.id]}
+
+        graph_info = {"graph": simple_graph, "mapping": mapping}
+
+        assert manager.commit_graph(**graph_info).result(timeout=30)
+
+        assert manager.start().result(timeout=30)
+        assert manager.record().result(timeout=30)
+        time.sleep(2)  # Wait for the FSMs to change
+        tag_uuid = manager.create_tag("test_tag").result(timeout=30)
+
+        manager.update_tag_descr(tag_uuid, "test_tag_descr").result(timeout=30)
+
+        assert manager.stop().result(timeout=30)
+        assert manager.collect().result(timeout=30)
+
+        assert (manager.logdir / "session_tags.json").exists()
+
+        with open(manager.logdir / "session_tags.json", "r") as f:
+            session_tags = json.load(f)
+            assert len(session_tags) == 1
+            tag_details = session_tags[tag_uuid]
+            assert tag_details["name"] == "test_tag"
+            assert tag_details["description"] == "test_tag_descr"
diff --git a/test/manager/test_session_tag_service.py b/test/manager/test_session_tag_service.py
new file mode 100644
index 0000000..bef472a
--- /dev/null
+++ b/test/manager/test_session_tag_service.py
@@ -0,0 +1,69 @@
+import json
+import tempfile
+import time
+from pathlib import Path
+
+import pytest
+
+from chimerapy.engine.eventbus import Event, EventBus, make_evented
+from chimerapy.engine.manager.events import TagEvent
+from chimerapy.engine.manager.session_tag_service import SessionTagService
+from chimerapy.engine.networking.async_loop_thread import AsyncLoopThread
+from chimerapy.engine.states import ManagerState, NodeState, WorkerState
+
+
+@pytest.fixture(scope="module")
+def testbed_setup():
+    thread = AsyncLoopThread()
+    thread.start()
+    eventbus = EventBus(thread=thread)
+
+    state = ManagerState(logdir=Path(tempfile.mkdtemp()))
+
+    make_evented(state, event_bus=eventbus)
+
+    tag_service = SessionTagService(name="tag_service", eventbus=eventbus, state=state)
+
+    return tag_service, state, eventbus
+
+
+def test_tag_service_tag_error(testbed_setup):
+    tag_service, state, bus = testbed_setup
+    can_create_tag, reason = tag_service.can_create_tag()
+
+    assert not can_create_tag
+    assert reason == "No nodes to tag"
+
+
+def test_tag_service_tag(testbed_setup):
+    # Add workers and nodes to the state
+    tag_service, state, bus = testbed_setup
+
+    state.workers["worker1"] = WorkerState(
+        name="worker1",
+        id="worker1",
+        ip="0.0.0.0",
+        port=0,
+        nodes={"node1": NodeState(name="node1", id="node1", fsm="NULL")},
+    )
+
+    can, reason = tag_service.can_create_tag()
+    assert not can
+    assert reason == "All nodes must be in RECORDING state to add a tag"
+
+    state.workers["worker1"].nodes["node1"].fsm = "RECORDING"
+    can, reason = tag_service.can_create_tag()
+    assert can
+    assert reason is None
+
+    bus.send(Event("start_recording")).result()
+    time.sleep(2)
+    bus.send(Event("create_tag", TagEvent("A", "tag1"))).result()
+    bus.send(Event("update_tag", TagEvent("A", "tag2", "tag2_descr"))).result()
+    bus.send(Event("stop_recording")).result()
+
+    with (state.logdir / "session_tags.json").open("r") as f:
+        tags = json.load(f)
+        assert tags["A"]["name"] == "tag2"
+        assert tags["A"]["description"] == "tag2_descr"
+        assert tags["A"]["timestamp"] > 2