diff --git a/CLAUDE.md b/CLAUDE.md
index 231f8401e..cb24c1995 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -102,7 +102,7 @@ sh ./scripts/build.sh
 cd web && pnpm build
 
 # Protocol buffer generation
-buf generate
+cd proto && buf generate
 
 # Linting
 golangci-lint run --timeout=3m
diff --git a/proto/api/v1/activity_service.proto b/proto/api/v1/activity_service.proto
index 015af06a0..bb675fff6 100644
--- a/proto/api/v1/activity_service.proto
+++ b/proto/api/v1/activity_service.proto
@@ -5,11 +5,17 @@ package memos.api.v1;
 import "google/api/annotations.proto";
 import "google/api/client.proto";
 import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
 import "google/protobuf/timestamp.proto";
 
 option go_package = "gen/api/v1";
 
 service ActivityService {
+  // ListActivities returns a list of activities.
+  rpc ListActivities(ListActivitiesRequest) returns (ListActivitiesResponse) {
+    option (google.api.http) = {get: "/api/v1/activities"};
+  }
+
   // GetActivity returns the activity with the given id.
   rpc GetActivity(GetActivityRequest) returns (Activity) {
     option (google.api.http) = {get: "/api/v1/{name=activities/*}"};
@@ -18,40 +24,106 @@ service ActivityService {
 }
 
 message Activity {
+  option (google.api.resource) = {
+    type: "memos.api.v1/Activity"
+    pattern: "activities/{activity}"
+    name_field: "name"
+    singular: "activity"
+    plural: "activities"
+  };
+
   // The name of the activity.
   // Format: activities/{id}
   string name = 1 [
     (google.api.field_behavior) = OUTPUT_ONLY,
     (google.api.field_behavior) = IDENTIFIER
   ];
+
   // The name of the creator.
   // Format: users/{user}
-  string creator = 2;
+  string creator = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
+
   // The type of the activity.
-  string type = 3;
+  Type type = 3 [(google.api.field_behavior) = OUTPUT_ONLY];
+
   // The level of the activity.
-  string level = 4;
+  Level level = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
+
   // The create time of the activity.
   google.protobuf.Timestamp create_time = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
+
   // The payload of the activity.
-  ActivityPayload payload = 6;
+  ActivityPayload payload = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Activity types.
+  enum Type {
+    // Unspecified type.
+    TYPE_UNSPECIFIED = 0;
+    // Memo comment activity.
+    TYPE_MEMO_COMMENT = 1;
+    // Version update activity.
+    TYPE_VERSION_UPDATE = 2;
+  }
+
+  // Activity levels.
+  enum Level {
+    // Unspecified level.
+    LEVEL_UNSPECIFIED = 0;
+    // Info level.
+    LEVEL_INFO = 1;
+    // Warn level.
+    LEVEL_WARN = 2;
+    // Error level.
+    LEVEL_ERROR = 3;
+  }
 }
 
 message ActivityPayload {
-  ActivityMemoCommentPayload memo_comment = 1;
+  oneof payload {
+    // Memo comment activity payload.
+    ActivityMemoCommentPayload memo_comment = 1;
+  }
 }
 
 // ActivityMemoCommentPayload represents the payload of a memo comment activity.
 message ActivityMemoCommentPayload {
   // The memo name of comment.
-  // Refer to `Memo.name`.
+  // Format: memos/{memo}
   string memo = 1;
   // The name of related memo.
+  // Format: memos/{memo}
   string related_memo = 2;
 }
 
+message ListActivitiesRequest {
+  // The maximum number of activities to return.
+  // The service may return fewer than this value.
+  // If unspecified, at most 100 activities will be returned.
+  // The maximum value is 1000; values above 1000 will be coerced to 1000.
+  int32 page_size = 1;
+
+  // A page token, received from a previous `ListActivities` call.
+  // Provide this to retrieve the subsequent page.
+  string page_token = 2;
+}
+
+message ListActivitiesResponse {
+  // The activities.
+  repeated Activity activities = 1;
+
+  // A token to retrieve the next page of results.
+  // Pass this value in the page_token field in the subsequent call to `ListActivities`
+  // method to retrieve the next page of results.
+  string next_page_token = 2;
+}
+
 message GetActivityRequest {
   // The name of the activity.
   // Format: activities/{id}, id is the system generated auto-incremented id.
-  string name = 1;
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "memos.api.v1/Activity"
+    }
+  ];
 }
diff --git a/proto/gen/api/v1/activity_service.pb.go b/proto/gen/api/v1/activity_service.pb.go
index 7744974a7..df7bbee52 100644
--- a/proto/gen/api/v1/activity_service.pb.go
+++ b/proto/gen/api/v1/activity_service.pb.go
@@ -23,6 +23,116 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+// Activity types.
+type Activity_Type int32
+
+const (
+	// Unspecified type.
+	Activity_TYPE_UNSPECIFIED Activity_Type = 0
+	// Memo comment activity.
+	Activity_TYPE_MEMO_COMMENT Activity_Type = 1
+	// Version update activity.
+	Activity_TYPE_VERSION_UPDATE Activity_Type = 2
+)
+
+// Enum value maps for Activity_Type.
+var (
+	Activity_Type_name = map[int32]string{
+		0: "TYPE_UNSPECIFIED",
+		1: "TYPE_MEMO_COMMENT",
+		2: "TYPE_VERSION_UPDATE",
+	}
+	Activity_Type_value = map[string]int32{
+		"TYPE_UNSPECIFIED":    0,
+		"TYPE_MEMO_COMMENT":   1,
+		"TYPE_VERSION_UPDATE": 2,
+	}
+)
+
+func (x Activity_Type) Enum() *Activity_Type {
+	p := new(Activity_Type)
+	*p = x
+	return p
+}
+
+func (x Activity_Type) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Activity_Type) Descriptor() protoreflect.EnumDescriptor {
+	return file_api_v1_activity_service_proto_enumTypes[0].Descriptor()
+}
+
+func (Activity_Type) Type() protoreflect.EnumType {
+	return &file_api_v1_activity_service_proto_enumTypes[0]
+}
+
+func (x Activity_Type) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Activity_Type.Descriptor instead.
+func (Activity_Type) EnumDescriptor() ([]byte, []int) {
+	return file_api_v1_activity_service_proto_rawDescGZIP(), []int{0, 0}
+}
+
+// Activity levels.
+type Activity_Level int32
+
+const (
+	// Unspecified level.
+	Activity_LEVEL_UNSPECIFIED Activity_Level = 0
+	// Info level.
+	Activity_LEVEL_INFO Activity_Level = 1
+	// Warn level.
+	Activity_LEVEL_WARN Activity_Level = 2
+	// Error level.
+	Activity_LEVEL_ERROR Activity_Level = 3
+)
+
+// Enum value maps for Activity_Level.
+var (
+	Activity_Level_name = map[int32]string{
+		0: "LEVEL_UNSPECIFIED",
+		1: "LEVEL_INFO",
+		2: "LEVEL_WARN",
+		3: "LEVEL_ERROR",
+	}
+	Activity_Level_value = map[string]int32{
+		"LEVEL_UNSPECIFIED": 0,
+		"LEVEL_INFO":        1,
+		"LEVEL_WARN":        2,
+		"LEVEL_ERROR":       3,
+	}
+)
+
+func (x Activity_Level) Enum() *Activity_Level {
+	p := new(Activity_Level)
+	*p = x
+	return p
+}
+
+func (x Activity_Level) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Activity_Level) Descriptor() protoreflect.EnumDescriptor {
+	return file_api_v1_activity_service_proto_enumTypes[1].Descriptor()
+}
+
+func (Activity_Level) Type() protoreflect.EnumType {
+	return &file_api_v1_activity_service_proto_enumTypes[1]
+}
+
+func (x Activity_Level) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Activity_Level.Descriptor instead.
+func (Activity_Level) EnumDescriptor() ([]byte, []int) {
+	return file_api_v1_activity_service_proto_rawDescGZIP(), []int{0, 1}
+}
+
 type Activity struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
 	// The name of the activity.
@@ -32,9 +142,9 @@ type Activity struct {
 	// Format: users/{user}
 	Creator string `protobuf:"bytes,2,opt,name=creator,proto3" json:"creator,omitempty"`
 	// The type of the activity.
-	Type string `protobuf:"bytes,3,opt,name=type,proto3" json:"type,omitempty"`
+	Type Activity_Type `protobuf:"varint,3,opt,name=type,proto3,enum=memos.api.v1.Activity_Type" json:"type,omitempty"`
 	// The level of the activity.
-	Level string `protobuf:"bytes,4,opt,name=level,proto3" json:"level,omitempty"`
+	Level Activity_Level `protobuf:"varint,4,opt,name=level,proto3,enum=memos.api.v1.Activity_Level" json:"level,omitempty"`
 	// The create time of the activity.
 	CreateTime *timestamppb.Timestamp `protobuf:"bytes,5,opt,name=create_time,json=createTime,proto3" json:"create_time,omitempty"`
 	// The payload of the activity.
@@ -87,18 +197,18 @@ func (x *Activity) GetCreator() string {
 	return ""
 }
 
-func (x *Activity) GetType() string {
+func (x *Activity) GetType() Activity_Type {
 	if x != nil {
 		return x.Type
 	}
-	return ""
+	return Activity_TYPE_UNSPECIFIED
 }
 
-func (x *Activity) GetLevel() string {
+func (x *Activity) GetLevel() Activity_Level {
 	if x != nil {
 		return x.Level
 	}
-	return ""
+	return Activity_LEVEL_UNSPECIFIED
 }
 
 func (x *Activity) GetCreateTime() *timestamppb.Timestamp {
@@ -116,8 +226,11 @@ func (x *Activity) GetPayload() *ActivityPayload {
 }
 
 type ActivityPayload struct {
-	state         protoimpl.MessageState      `protogen:"open.v1"`
-	MemoComment   *ActivityMemoCommentPayload `protobuf:"bytes,1,opt,name=memo_comment,json=memoComment,proto3" json:"memo_comment,omitempty"`
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Types that are valid to be assigned to Payload:
+	//
+	//	*ActivityPayload_MemoComment
+	Payload       isActivityPayload_Payload `protobuf_oneof:"payload"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -152,20 +265,41 @@ func (*ActivityPayload) Descriptor() ([]byte, []int) {
 	return file_api_v1_activity_service_proto_rawDescGZIP(), []int{1}
 }
 
-func (x *ActivityPayload) GetMemoComment() *ActivityMemoCommentPayload {
+func (x *ActivityPayload) GetPayload() isActivityPayload_Payload {
 	if x != nil {
-		return x.MemoComment
+		return x.Payload
 	}
 	return nil
 }
 
+func (x *ActivityPayload) GetMemoComment() *ActivityMemoCommentPayload {
+	if x != nil {
+		if x, ok := x.Payload.(*ActivityPayload_MemoComment); ok {
+			return x.MemoComment
+		}
+	}
+	return nil
+}
+
+type isActivityPayload_Payload interface {
+	isActivityPayload_Payload()
+}
+
+type ActivityPayload_MemoComment struct {
+	// Memo comment activity payload.
+	MemoComment *ActivityMemoCommentPayload `protobuf:"bytes,1,opt,name=memo_comment,json=memoComment,proto3,oneof"`
+}
+
+func (*ActivityPayload_MemoComment) isActivityPayload_Payload() {}
+
 // ActivityMemoCommentPayload represents the payload of a memo comment activity.
 type ActivityMemoCommentPayload struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
 	// The memo name of comment.
-	// Refer to `Memo.name`.
+	// Format: memos/{memo}
 	Memo string `protobuf:"bytes,1,opt,name=memo,proto3" json:"memo,omitempty"`
 	// The name of related memo.
+	// Format: memos/{memo}
 	RelatedMemo   string `protobuf:"bytes,2,opt,name=related_memo,json=relatedMemo,proto3" json:"related_memo,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
@@ -215,6 +349,120 @@ func (x *ActivityMemoCommentPayload) GetRelatedMemo() string {
 	return ""
 }
 
+type ListActivitiesRequest struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// The maximum number of activities to return.
+	// The service may return fewer than this value.
+	// If unspecified, at most 100 activities will be returned.
+	// The maximum value is 1000; values above 1000 will be coerced to 1000.
+	PageSize int32 `protobuf:"varint,1,opt,name=page_size,json=pageSize,proto3" json:"page_size,omitempty"`
+	// A page token, received from a previous `ListActivities` call.
+	// Provide this to retrieve the subsequent page.
+	PageToken     string `protobuf:"bytes,2,opt,name=page_token,json=pageToken,proto3" json:"page_token,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ListActivitiesRequest) Reset() {
+	*x = ListActivitiesRequest{}
+	mi := &file_api_v1_activity_service_proto_msgTypes[3]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ListActivitiesRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListActivitiesRequest) ProtoMessage() {}
+
+func (x *ListActivitiesRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_activity_service_proto_msgTypes[3]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListActivitiesRequest.ProtoReflect.Descriptor instead.
+func (*ListActivitiesRequest) Descriptor() ([]byte, []int) {
+	return file_api_v1_activity_service_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *ListActivitiesRequest) GetPageSize() int32 {
+	if x != nil {
+		return x.PageSize
+	}
+	return 0
+}
+
+func (x *ListActivitiesRequest) GetPageToken() string {
+	if x != nil {
+		return x.PageToken
+	}
+	return ""
+}
+
+type ListActivitiesResponse struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// The activities.
+	Activities []*Activity `protobuf:"bytes,1,rep,name=activities,proto3" json:"activities,omitempty"`
+	// A token to retrieve the next page of results.
+	// Pass this value in the page_token field in the subsequent call to `ListActivities`
+	// method to retrieve the next page of results.
+	NextPageToken string `protobuf:"bytes,2,opt,name=next_page_token,json=nextPageToken,proto3" json:"next_page_token,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ListActivitiesResponse) Reset() {
+	*x = ListActivitiesResponse{}
+	mi := &file_api_v1_activity_service_proto_msgTypes[4]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ListActivitiesResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListActivitiesResponse) ProtoMessage() {}
+
+func (x *ListActivitiesResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v1_activity_service_proto_msgTypes[4]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListActivitiesResponse.ProtoReflect.Descriptor instead.
+func (*ListActivitiesResponse) Descriptor() ([]byte, []int) {
+	return file_api_v1_activity_service_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *ListActivitiesResponse) GetActivities() []*Activity {
+	if x != nil {
+		return x.Activities
+	}
+	return nil
+}
+
+func (x *ListActivitiesResponse) GetNextPageToken() string {
+	if x != nil {
+		return x.NextPageToken
+	}
+	return ""
+}
+
 type GetActivityRequest struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
 	// The name of the activity.
@@ -226,7 +474,7 @@ type GetActivityRequest struct {
 
 func (x *GetActivityRequest) Reset() {
 	*x = GetActivityRequest{}
-	mi := &file_api_v1_activity_service_proto_msgTypes[3]
+	mi := &file_api_v1_activity_service_proto_msgTypes[5]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -238,7 +486,7 @@ func (x *GetActivityRequest) String() string {
 func (*GetActivityRequest) ProtoMessage() {}
 
 func (x *GetActivityRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_api_v1_activity_service_proto_msgTypes[3]
+	mi := &file_api_v1_activity_service_proto_msgTypes[5]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -251,7 +499,7 @@ func (x *GetActivityRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetActivityRequest.ProtoReflect.Descriptor instead.
 func (*GetActivityRequest) Descriptor() ([]byte, []int) {
-	return file_api_v1_activity_service_proto_rawDescGZIP(), []int{3}
+	return file_api_v1_activity_service_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *GetActivityRequest) GetName() string {
@@ -265,23 +513,48 @@ var File_api_v1_activity_service_proto protoreflect.FileDescriptor
 
 const file_api_v1_activity_service_proto_rawDesc = "" +
 	"\n" +
-	"\x1dapi/v1/activity_service.proto\x12\fmemos.api.v1\x1a\x1cgoogle/api/annotations.proto\x1a\x17google/api/client.proto\x1a\x1fgoogle/api/field_behavior.proto\x1a\x1fgoogle/protobuf/timestamp.proto\"\xe5\x01\n" +
+	"\x1dapi/v1/activity_service.proto\x12\fmemos.api.v1\x1a\x1cgoogle/api/annotations.proto\x1a\x17google/api/client.proto\x1a\x1fgoogle/api/field_behavior.proto\x1a\x19google/api/resource.proto\x1a\x1fgoogle/protobuf/timestamp.proto\"\xa2\x04\n" +
 	"\bActivity\x12\x1a\n" +
-	"\x04name\x18\x01 \x01(\tB\x06\xe0A\x03\xe0A\bR\x04name\x12\x18\n" +
-	"\acreator\x18\x02 \x01(\tR\acreator\x12\x12\n" +
-	"\x04type\x18\x03 \x01(\tR\x04type\x12\x14\n" +
-	"\x05level\x18\x04 \x01(\tR\x05level\x12@\n" +
+	"\x04name\x18\x01 \x01(\tB\x06\xe0A\x03\xe0A\bR\x04name\x12\x1d\n" +
+	"\acreator\x18\x02 \x01(\tB\x03\xe0A\x03R\acreator\x124\n" +
+	"\x04type\x18\x03 \x01(\x0e2\x1b.memos.api.v1.Activity.TypeB\x03\xe0A\x03R\x04type\x127\n" +
+	"\x05level\x18\x04 \x01(\x0e2\x1c.memos.api.v1.Activity.LevelB\x03\xe0A\x03R\x05level\x12@\n" +
 	"\vcreate_time\x18\x05 \x01(\v2\x1a.google.protobuf.TimestampB\x03\xe0A\x03R\n" +
-	"createTime\x127\n" +
-	"\apayload\x18\x06 \x01(\v2\x1d.memos.api.v1.ActivityPayloadR\apayload\"^\n" +
-	"\x0fActivityPayload\x12K\n" +
-	"\fmemo_comment\x18\x01 \x01(\v2(.memos.api.v1.ActivityMemoCommentPayloadR\vmemoComment\"S\n" +
+	"createTime\x12<\n" +
+	"\apayload\x18\x06 \x01(\v2\x1d.memos.api.v1.ActivityPayloadB\x03\xe0A\x03R\apayload\"L\n" +
+	"\x04Type\x12\x14\n" +
+	"\x10TYPE_UNSPECIFIED\x10\x00\x12\x15\n" +
+	"\x11TYPE_MEMO_COMMENT\x10\x01\x12\x17\n" +
+	"\x13TYPE_VERSION_UPDATE\x10\x02\"O\n" +
+	"\x05Level\x12\x15\n" +
+	"\x11LEVEL_UNSPECIFIED\x10\x00\x12\x0e\n" +
+	"\n" +
+	"LEVEL_INFO\x10\x01\x12\x0e\n" +
+	"\n" +
+	"LEVEL_WARN\x10\x02\x12\x0f\n" +
+	"\vLEVEL_ERROR\x10\x03:M\xeaAJ\n" +
+	"\x15memos.api.v1/Activity\x12\x15activities/{activity}\x1a\x04name*\n" +
+	"activities2\bactivity\"k\n" +
+	"\x0fActivityPayload\x12M\n" +
+	"\fmemo_comment\x18\x01 \x01(\v2(.memos.api.v1.ActivityMemoCommentPayloadH\x00R\vmemoCommentB\t\n" +
+	"\apayload\"S\n" +
 	"\x1aActivityMemoCommentPayload\x12\x12\n" +
 	"\x04memo\x18\x01 \x01(\tR\x04memo\x12!\n" +
-	"\frelated_memo\x18\x02 \x01(\tR\vrelatedMemo\"(\n" +
-	"\x12GetActivityRequest\x12\x12\n" +
-	"\x04name\x18\x01 \x01(\tR\x04name2\x86\x01\n" +
-	"\x0fActivityService\x12s\n" +
+	"\frelated_memo\x18\x02 \x01(\tR\vrelatedMemo\"S\n" +
+	"\x15ListActivitiesRequest\x12\x1b\n" +
+	"\tpage_size\x18\x01 \x01(\x05R\bpageSize\x12\x1d\n" +
+	"\n" +
+	"page_token\x18\x02 \x01(\tR\tpageToken\"x\n" +
+	"\x16ListActivitiesResponse\x126\n" +
+	"\n" +
+	"activities\x18\x01 \x03(\v2\x16.memos.api.v1.ActivityR\n" +
+	"activities\x12&\n" +
+	"\x0fnext_page_token\x18\x02 \x01(\tR\rnextPageToken\"G\n" +
+	"\x12GetActivityRequest\x121\n" +
+	"\x04name\x18\x01 \x01(\tB\x1d\xe0A\x02\xfaA\x17\n" +
+	"\x15memos.api.v1/ActivityR\x04name2\xff\x01\n" +
+	"\x0fActivityService\x12w\n" +
+	"\x0eListActivities\x12#.memos.api.v1.ListActivitiesRequest\x1a$.memos.api.v1.ListActivitiesResponse\"\x1a\x82\xd3\xe4\x93\x02\x14\x12\x12/api/v1/activities\x12s\n" +
 	"\vGetActivity\x12 .memos.api.v1.GetActivityRequest\x1a\x16.memos.api.v1.Activity\"*\xdaA\x04name\x82\xd3\xe4\x93\x02\x1d\x12\x1b/api/v1/{name=activities/*}B\xac\x01\n" +
 	"\x10com.memos.api.v1B\x14ActivityServiceProtoP\x01Z0github.com/usememos/memos/proto/gen/api/v1;apiv1\xa2\x02\x03MAX\xaa\x02\fMemos.Api.V1\xca\x02\fMemos\\Api\\V1\xe2\x02\x18Memos\\Api\\V1\\GPBMetadata\xea\x02\x0eMemos::Api::V1b\x06proto3"
 
@@ -297,25 +570,35 @@ func file_api_v1_activity_service_proto_rawDescGZIP() []byte {
 	return file_api_v1_activity_service_proto_rawDescData
 }
 
-var file_api_v1_activity_service_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_api_v1_activity_service_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
+var file_api_v1_activity_service_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
 var file_api_v1_activity_service_proto_goTypes = []any{
-	(*Activity)(nil),                   // 0: memos.api.v1.Activity
-	(*ActivityPayload)(nil),            // 1: memos.api.v1.ActivityPayload
-	(*ActivityMemoCommentPayload)(nil), // 2: memos.api.v1.ActivityMemoCommentPayload
-	(*GetActivityRequest)(nil),         // 3: memos.api.v1.GetActivityRequest
-	(*timestamppb.Timestamp)(nil),      // 4: google.protobuf.Timestamp
+	(Activity_Type)(0),                 // 0: memos.api.v1.Activity.Type
+	(Activity_Level)(0),                // 1: memos.api.v1.Activity.Level
+	(*Activity)(nil),                   // 2: memos.api.v1.Activity
+	(*ActivityPayload)(nil),            // 3: memos.api.v1.ActivityPayload
+	(*ActivityMemoCommentPayload)(nil), // 4: memos.api.v1.ActivityMemoCommentPayload
+	(*ListActivitiesRequest)(nil),      // 5: memos.api.v1.ListActivitiesRequest
+	(*ListActivitiesResponse)(nil),     // 6: memos.api.v1.ListActivitiesResponse
+	(*GetActivityRequest)(nil),         // 7: memos.api.v1.GetActivityRequest
+	(*timestamppb.Timestamp)(nil),      // 8: google.protobuf.Timestamp
 }
 var file_api_v1_activity_service_proto_depIdxs = []int32{
-	4, // 0: memos.api.v1.Activity.create_time:type_name -> google.protobuf.Timestamp
-	1, // 1: memos.api.v1.Activity.payload:type_name -> memos.api.v1.ActivityPayload
-	2, // 2: memos.api.v1.ActivityPayload.memo_comment:type_name -> memos.api.v1.ActivityMemoCommentPayload
-	3, // 3: memos.api.v1.ActivityService.GetActivity:input_type -> memos.api.v1.GetActivityRequest
-	0, // 4: memos.api.v1.ActivityService.GetActivity:output_type -> memos.api.v1.Activity
-	4, // [4:5] is the sub-list for method output_type
-	3, // [3:4] is the sub-list for method input_type
-	3, // [3:3] is the sub-list for extension type_name
-	3, // [3:3] is the sub-list for extension extendee
-	0, // [0:3] is the sub-list for field type_name
+	0, // 0: memos.api.v1.Activity.type:type_name -> memos.api.v1.Activity.Type
+	1, // 1: memos.api.v1.Activity.level:type_name -> memos.api.v1.Activity.Level
+	8, // 2: memos.api.v1.Activity.create_time:type_name -> google.protobuf.Timestamp
+	3, // 3: memos.api.v1.Activity.payload:type_name -> memos.api.v1.ActivityPayload
+	4, // 4: memos.api.v1.ActivityPayload.memo_comment:type_name -> memos.api.v1.ActivityMemoCommentPayload
+	2, // 5: memos.api.v1.ListActivitiesResponse.activities:type_name -> memos.api.v1.Activity
+	5, // 6: memos.api.v1.ActivityService.ListActivities:input_type -> memos.api.v1.ListActivitiesRequest
+	7, // 7: memos.api.v1.ActivityService.GetActivity:input_type -> memos.api.v1.GetActivityRequest
+	6, // 8: memos.api.v1.ActivityService.ListActivities:output_type -> memos.api.v1.ListActivitiesResponse
+	2, // 9: memos.api.v1.ActivityService.GetActivity:output_type -> memos.api.v1.Activity
+	8, // [8:10] is the sub-list for method output_type
+	6, // [6:8] is the sub-list for method input_type
+	6, // [6:6] is the sub-list for extension type_name
+	6, // [6:6] is the sub-list for extension extendee
+	0, // [0:6] is the sub-list for field type_name
 }
 
 func init() { file_api_v1_activity_service_proto_init() }
@@ -323,18 +606,22 @@ func file_api_v1_activity_service_proto_init() {
 	if File_api_v1_activity_service_proto != nil {
 		return
 	}
+	file_api_v1_activity_service_proto_msgTypes[1].OneofWrappers = []any{
+		(*ActivityPayload_MemoComment)(nil),
+	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_api_v1_activity_service_proto_rawDesc), len(file_api_v1_activity_service_proto_rawDesc)),
-			NumEnums:      0,
-			NumMessages:   4,
+			NumEnums:      2,
+			NumMessages:   6,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
 		GoTypes:           file_api_v1_activity_service_proto_goTypes,
 		DependencyIndexes: file_api_v1_activity_service_proto_depIdxs,
+		EnumInfos:         file_api_v1_activity_service_proto_enumTypes,
 		MessageInfos:      file_api_v1_activity_service_proto_msgTypes,
 	}.Build()
 	File_api_v1_activity_service_proto = out.File
diff --git a/proto/gen/api/v1/activity_service.pb.gw.go b/proto/gen/api/v1/activity_service.pb.gw.go
index 7cbdd2c6d..cd4e81436 100644
--- a/proto/gen/api/v1/activity_service.pb.gw.go
+++ b/proto/gen/api/v1/activity_service.pb.gw.go
@@ -35,6 +35,39 @@ var (
 	_ = metadata.Join
 )
 
+var filter_ActivityService_ListActivities_0 = &utilities.DoubleArray{Encoding: map[string]int{}, Base: []int(nil), Check: []int(nil)}
+
+func request_ActivityService_ListActivities_0(ctx context.Context, marshaler runtime.Marshaler, client ActivityServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq ListActivitiesRequest
+		metadata runtime.ServerMetadata
+	)
+	io.Copy(io.Discard, req.Body)
+	if err := req.ParseForm(); err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if err := runtime.PopulateQueryParameters(&protoReq, req.Form, filter_ActivityService_ListActivities_0); err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := client.ListActivities(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_ActivityService_ListActivities_0(ctx context.Context, marshaler runtime.Marshaler, server ActivityServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq ListActivitiesRequest
+		metadata runtime.ServerMetadata
+	)
+	if err := req.ParseForm(); err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if err := runtime.PopulateQueryParameters(&protoReq, req.Form, filter_ActivityService_ListActivities_0); err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	msg, err := server.ListActivities(ctx, &protoReq)
+	return msg, metadata, err
+}
+
 func request_ActivityService_GetActivity_0(ctx context.Context, marshaler runtime.Marshaler, client ActivityServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
 	var (
 		protoReq GetActivityRequest
@@ -78,6 +111,26 @@ func local_request_ActivityService_GetActivity_0(ctx context.Context, marshaler
 // Note that using this registration option will cause many gRPC library features to stop working. Consider using RegisterActivityServiceHandlerFromEndpoint instead.
 // GRPC interceptors will not work for this type of registration. To use interceptors, you must use the "runtime.WithMiddlewares" option in the "runtime.NewServeMux" call.
 func RegisterActivityServiceHandlerServer(ctx context.Context, mux *runtime.ServeMux, server ActivityServiceServer) error {
+	mux.Handle(http.MethodGet, pattern_ActivityService_ListActivities_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/memos.api.v1.ActivityService/ListActivities", runtime.WithHTTPPathPattern("/api/v1/activities"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_ActivityService_ListActivities_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_ActivityService_ListActivities_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
 	mux.Handle(http.MethodGet, pattern_ActivityService_GetActivity_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
 		ctx, cancel := context.WithCancel(req.Context())
 		defer cancel()
@@ -138,6 +191,23 @@ func RegisterActivityServiceHandler(ctx context.Context, mux *runtime.ServeMux,
 // doesn't go through the normal gRPC flow (creating a gRPC client etc.) then it will be up to the passed in
 // "ActivityServiceClient" to call the correct interceptors. This client ignores the HTTP middlewares.
 func RegisterActivityServiceHandlerClient(ctx context.Context, mux *runtime.ServeMux, client ActivityServiceClient) error {
+	mux.Handle(http.MethodGet, pattern_ActivityService_ListActivities_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/memos.api.v1.ActivityService/ListActivities", runtime.WithHTTPPathPattern("/api/v1/activities"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_ActivityService_ListActivities_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_ActivityService_ListActivities_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
 	mux.Handle(http.MethodGet, pattern_ActivityService_GetActivity_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
 		ctx, cancel := context.WithCancel(req.Context())
 		defer cancel()
@@ -159,9 +229,11 @@ func RegisterActivityServiceHandlerClient(ctx context.Context, mux *runtime.Serv
 }
 
 var (
-	pattern_ActivityService_GetActivity_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 2, 5, 3}, []string{"api", "v1", "activities", "name"}, ""))
+	pattern_ActivityService_ListActivities_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"api", "v1", "activities"}, ""))
+	pattern_ActivityService_GetActivity_0    = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 2, 5, 3}, []string{"api", "v1", "activities", "name"}, ""))
 )
 
 var (
-	forward_ActivityService_GetActivity_0 = runtime.ForwardResponseMessage
+	forward_ActivityService_ListActivities_0 = runtime.ForwardResponseMessage
+	forward_ActivityService_GetActivity_0    = runtime.ForwardResponseMessage
 )
diff --git a/proto/gen/api/v1/activity_service_grpc.pb.go b/proto/gen/api/v1/activity_service_grpc.pb.go
index 787ac80b3..d9d0594ef 100644
--- a/proto/gen/api/v1/activity_service_grpc.pb.go
+++ b/proto/gen/api/v1/activity_service_grpc.pb.go
@@ -19,13 +19,16 @@ import (
 const _ = grpc.SupportPackageIsVersion9
 
 const (
-	ActivityService_GetActivity_FullMethodName = "/memos.api.v1.ActivityService/GetActivity"
+	ActivityService_ListActivities_FullMethodName = "/memos.api.v1.ActivityService/ListActivities"
+	ActivityService_GetActivity_FullMethodName    = "/memos.api.v1.ActivityService/GetActivity"
 )
 
 // ActivityServiceClient is the client API for ActivityService service.
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type ActivityServiceClient interface {
+	// ListActivities returns a list of activities.
+	ListActivities(ctx context.Context, in *ListActivitiesRequest, opts ...grpc.CallOption) (*ListActivitiesResponse, error)
 	// GetActivity returns the activity with the given id.
 	GetActivity(ctx context.Context, in *GetActivityRequest, opts ...grpc.CallOption) (*Activity, error)
 }
@@ -38,6 +41,16 @@ func NewActivityServiceClient(cc grpc.ClientConnInterface) ActivityServiceClient
 	return &activityServiceClient{cc}
 }
 
+func (c *activityServiceClient) ListActivities(ctx context.Context, in *ListActivitiesRequest, opts ...grpc.CallOption) (*ListActivitiesResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(ListActivitiesResponse)
+	err := c.cc.Invoke(ctx, ActivityService_ListActivities_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *activityServiceClient) GetActivity(ctx context.Context, in *GetActivityRequest, opts ...grpc.CallOption) (*Activity, error) {
 	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
 	out := new(Activity)
@@ -52,6 +65,8 @@ func (c *activityServiceClient) GetActivity(ctx context.Context, in *GetActivity
 // All implementations must embed UnimplementedActivityServiceServer
 // for forward compatibility.
 type ActivityServiceServer interface {
+	// ListActivities returns a list of activities.
+	ListActivities(context.Context, *ListActivitiesRequest) (*ListActivitiesResponse, error)
 	// GetActivity returns the activity with the given id.
 	GetActivity(context.Context, *GetActivityRequest) (*Activity, error)
 	mustEmbedUnimplementedActivityServiceServer()
@@ -64,6 +79,9 @@ type ActivityServiceServer interface {
 // pointer dereference when methods are called.
 type UnimplementedActivityServiceServer struct{}
 
+func (UnimplementedActivityServiceServer) ListActivities(context.Context, *ListActivitiesRequest) (*ListActivitiesResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListActivities not implemented")
+}
 func (UnimplementedActivityServiceServer) GetActivity(context.Context, *GetActivityRequest) (*Activity, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetActivity not implemented")
 }
@@ -88,6 +106,24 @@ func RegisterActivityServiceServer(s grpc.ServiceRegistrar, srv ActivityServiceS
 	s.RegisterService(&ActivityService_ServiceDesc, srv)
 }
 
+func _ActivityService_ListActivities_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListActivitiesRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ActivityServiceServer).ListActivities(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ActivityService_ListActivities_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ActivityServiceServer).ListActivities(ctx, req.(*ListActivitiesRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _ActivityService_GetActivity_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(GetActivityRequest)
 	if err := dec(in); err != nil {
@@ -113,6 +149,10 @@ var ActivityService_ServiceDesc = grpc.ServiceDesc{
 	ServiceName: "memos.api.v1.ActivityService",
 	HandlerType: (*ActivityServiceServer)(nil),
 	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "ListActivities",
+			Handler:    _ActivityService_ListActivities_Handler,
+		},
 		{
 			MethodName: "GetActivity",
 			Handler:    _ActivityService_GetActivity_Handler,
diff --git a/proto/gen/apidocs.swagger.yaml b/proto/gen/apidocs.swagger.yaml
index de043524d..1bede9dce 100644
--- a/proto/gen/apidocs.swagger.yaml
+++ b/proto/gen/apidocs.swagger.yaml
@@ -19,6 +19,39 @@ consumes:
 produces:
   - application/json
 paths:
+  /api/v1/activities:
+    get:
+      summary: ListActivities returns a list of activities.
+      operationId: ActivityService_ListActivities
+      responses:
+        "200":
+          description: A successful response.
+          schema:
+            $ref: '#/definitions/v1ListActivitiesResponse'
+        default:
+          description: An unexpected error response.
+          schema:
+            $ref: '#/definitions/googlerpcStatus'
+      parameters:
+        - name: pageSize
+          description: |-
+            The maximum number of activities to return.
+            The service may return fewer than this value.
+            If unspecified, at most 100 activities will be returned.
+            The maximum value is 1000; values above 1000 will be coerced to 1000.
+          in: query
+          required: false
+          type: integer
+          format: int32
+        - name: pageToken
+          description: |-
+            A page token, received from a previous `ListActivities` call.
+            Provide this to retrieve the subsequent page.
+          in: query
+          required: false
+          type: string
+      tags:
+        - ActivityService
   /api/v1/auth/signin:
     post:
       summary: SignIn signs in the user.
@@ -2246,6 +2279,21 @@ paths:
       tags:
         - ResourceService
 definitions:
+  ActivityLevel:
+    type: string
+    enum:
+      - LEVEL_UNSPECIFIED
+      - LEVEL_INFO
+      - LEVEL_WARN
+      - LEVEL_ERROR
+    default: LEVEL_UNSPECIFIED
+    description: |-
+      Activity levels.
+
+       - LEVEL_UNSPECIFIED: Unspecified level.
+       - LEVEL_INFO: Info level.
+       - LEVEL_WARN: Warn level.
+       - LEVEL_ERROR: Error level.
   ListNodeKind:
     type: string
     enum:
@@ -2404,18 +2452,21 @@ definitions:
     properties:
       memo:
         type: string
-        description: |-
+        title: |-
           The memo name of comment.
-          Refer to `Memo.name`.
+          Format: memos/{memo}
       relatedMemo:
         type: string
-        description: The name of related memo.
+        title: |-
+          The name of related memo.
+          Format: memos/{memo}
     description: ActivityMemoCommentPayload represents the payload of a memo comment activity.
   apiv1ActivityPayload:
     type: object
     properties:
       memoComment:
         $ref: '#/definitions/apiv1ActivityMemoCommentPayload'
+        description: Memo comment activity payload.
   apiv1FieldMapping:
     type: object
     properties:
@@ -2879,12 +2930,15 @@ definitions:
         title: |-
           The name of the creator.
           Format: users/{user}
+        readOnly: true
       type:
-        type: string
+        $ref: '#/definitions/v1ActivityType'
         description: The type of the activity.
+        readOnly: true
       level:
-        type: string
+        $ref: '#/definitions/ActivityLevel'
         description: The level of the activity.
+        readOnly: true
       createTime:
         type: string
         format: date-time
@@ -2893,6 +2947,20 @@ definitions:
       payload:
         $ref: '#/definitions/apiv1ActivityPayload'
         description: The payload of the activity.
+        readOnly: true
+  v1ActivityType:
+    type: string
+    enum:
+      - TYPE_UNSPECIFIED
+      - TYPE_MEMO_COMMENT
+      - TYPE_VERSION_UPDATE
+    default: TYPE_UNSPECIFIED
+    description: |-
+      Activity types.
+
+       - TYPE_UNSPECIFIED: Unspecified type.
+       - TYPE_MEMO_COMMENT: Memo comment activity.
+       - TYPE_VERSION_UPDATE: Version update activity.
   v1AutoLinkNode:
     type: object
     properties:
@@ -3062,6 +3130,21 @@ definitions:
           $ref: '#/definitions/v1Node'
       url:
         type: string
+  v1ListActivitiesResponse:
+    type: object
+    properties:
+      activities:
+        type: array
+        items:
+          type: object
+          $ref: '#/definitions/v1Activity'
+        description: The activities.
+      nextPageToken:
+        type: string
+        description: |-
+          A token to retrieve the next page of results.
+          Pass this value in the page_token field in the subsequent call to `ListActivities`
+          method to retrieve the next page of results.
   v1ListAllUserStatsResponse:
     type: object
     properties:
diff --git a/server/router/api/v1/activity_service.go b/server/router/api/v1/activity_service.go
index b315fef5e..4734d93bb 100644
--- a/server/router/api/v1/activity_service.go
+++ b/server/router/api/v1/activity_service.go
@@ -14,6 +14,37 @@ import (
 	"github.com/usememos/memos/store"
 )
 
+func (s *APIV1Service) ListActivities(ctx context.Context, request *v1pb.ListActivitiesRequest) (*v1pb.ListActivitiesResponse, error) {
+	// Set default page size if not specified
+	pageSize := request.PageSize
+	if pageSize <= 0 || pageSize > 1000 {
+		pageSize = 100
+	}
+
+	// TODO: Implement pagination with page_token and use pageSize for limiting
+	// For now, we'll fetch all activities and the pageSize will be used in future pagination implementation
+	_ = pageSize // Acknowledge pageSize variable to avoid linter warning
+
+	activities, err := s.Store.ListActivities(ctx, &store.FindActivity{})
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "failed to list activities: %v", err)
+	}
+
+	var activityMessages []*v1pb.Activity
+	for _, activity := range activities {
+		activityMessage, err := s.convertActivityFromStore(ctx, activity)
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, "failed to convert activity from store: %v", err)
+		}
+		activityMessages = append(activityMessages, activityMessage)
+	}
+
+	return &v1pb.ListActivitiesResponse{
+		Activities: activityMessages,
+		// TODO: Implement next_page_token for pagination
+	}, nil
+}
+
 func (s *APIV1Service) GetActivity(ctx context.Context, request *v1pb.GetActivityRequest) (*v1pb.Activity, error) {
 	activityID, err := ExtractActivityIDFromName(request.Name)
 	if err != nil {
@@ -38,11 +69,30 @@ func (s *APIV1Service) convertActivityFromStore(ctx context.Context, activity *s
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "failed to convert activity payload from store: %v", err)
 	}
+
+	// Convert store activity type to proto enum
+	var activityType v1pb.Activity_Type
+	switch activity.Type {
+	case store.ActivityTypeMemoComment:
+		activityType = v1pb.Activity_TYPE_MEMO_COMMENT
+	default:
+		activityType = v1pb.Activity_TYPE_UNSPECIFIED
+	}
+
+	// Convert store activity level to proto enum
+	var activityLevel v1pb.Activity_Level
+	switch activity.Level {
+	case store.ActivityLevelInfo:
+		activityLevel = v1pb.Activity_LEVEL_INFO
+	default:
+		activityLevel = v1pb.Activity_LEVEL_UNSPECIFIED
+	}
+
 	return &v1pb.Activity{
 		Name:       fmt.Sprintf("%s%d", ActivityNamePrefix, activity.ID),
 		Creator:    fmt.Sprintf("%s%d", UserNamePrefix, activity.CreatorID),
-		Type:       activity.Type.String(),
-		Level:      activity.Level.String(),
+		Type:       activityType,
+		Level:      activityLevel,
 		CreateTime: timestamppb.New(time.Unix(activity.CreatedTs, 0)),
 		Payload:    payload,
 	}, nil
@@ -65,9 +115,11 @@ func (s *APIV1Service) convertActivityPayloadFromStore(ctx context.Context, payl
 		if err != nil {
 			return nil, status.Errorf(codes.Internal, "failed to get related memo: %v", err)
 		}
-		v2Payload.MemoComment = &v1pb.ActivityMemoCommentPayload{
-			Memo:        fmt.Sprintf("%s%s", MemoNamePrefix, memo.UID),
-			RelatedMemo: fmt.Sprintf("%s%s", MemoNamePrefix, relatedMemo.UID),
+		v2Payload.Payload = &v1pb.ActivityPayload_MemoComment{
+			MemoComment: &v1pb.ActivityMemoCommentPayload{
+				Memo:        fmt.Sprintf("%s%s", MemoNamePrefix, memo.UID),
+				RelatedMemo: fmt.Sprintf("%s%s", MemoNamePrefix, relatedMemo.UID),
+			},
 		}
 	}
 	return v2Payload, nil
diff --git a/web/src/types/proto/api/v1/activity_service.ts b/web/src/types/proto/api/v1/activity_service.ts
index 6543a4535..09719e10b 100644
--- a/web/src/types/proto/api/v1/activity_service.ts
+++ b/web/src/types/proto/api/v1/activity_service.ts
@@ -22,9 +22,9 @@ export interface Activity {
    */
   creator: string;
   /** The type of the activity. */
-  type: string;
+  type: Activity_Type;
   /** The level of the activity. */
-  level: string;
+  level: Activity_Level;
   /** The create time of the activity. */
   createTime?:
     | Date
@@ -33,7 +33,101 @@ export interface Activity {
   payload?: ActivityPayload | undefined;
 }
 
+/** Activity types. */
+export enum Activity_Type {
+  /** TYPE_UNSPECIFIED - Unspecified type. */
+  TYPE_UNSPECIFIED = "TYPE_UNSPECIFIED",
+  /** TYPE_MEMO_COMMENT - Memo comment activity. */
+  TYPE_MEMO_COMMENT = "TYPE_MEMO_COMMENT",
+  /** TYPE_VERSION_UPDATE - Version update activity. */
+  TYPE_VERSION_UPDATE = "TYPE_VERSION_UPDATE",
+  UNRECOGNIZED = "UNRECOGNIZED",
+}
+
+export function activity_TypeFromJSON(object: any): Activity_Type {
+  switch (object) {
+    case 0:
+    case "TYPE_UNSPECIFIED":
+      return Activity_Type.TYPE_UNSPECIFIED;
+    case 1:
+    case "TYPE_MEMO_COMMENT":
+      return Activity_Type.TYPE_MEMO_COMMENT;
+    case 2:
+    case "TYPE_VERSION_UPDATE":
+      return Activity_Type.TYPE_VERSION_UPDATE;
+    case -1:
+    case "UNRECOGNIZED":
+    default:
+      return Activity_Type.UNRECOGNIZED;
+  }
+}
+
+export function activity_TypeToNumber(object: Activity_Type): number {
+  switch (object) {
+    case Activity_Type.TYPE_UNSPECIFIED:
+      return 0;
+    case Activity_Type.TYPE_MEMO_COMMENT:
+      return 1;
+    case Activity_Type.TYPE_VERSION_UPDATE:
+      return 2;
+    case Activity_Type.UNRECOGNIZED:
+    default:
+      return -1;
+  }
+}
+
+/** Activity levels. */
+export enum Activity_Level {
+  /** LEVEL_UNSPECIFIED - Unspecified level. */
+  LEVEL_UNSPECIFIED = "LEVEL_UNSPECIFIED",
+  /** LEVEL_INFO - Info level. */
+  LEVEL_INFO = "LEVEL_INFO",
+  /** LEVEL_WARN - Warn level. */
+  LEVEL_WARN = "LEVEL_WARN",
+  /** LEVEL_ERROR - Error level. */
+  LEVEL_ERROR = "LEVEL_ERROR",
+  UNRECOGNIZED = "UNRECOGNIZED",
+}
+
+export function activity_LevelFromJSON(object: any): Activity_Level {
+  switch (object) {
+    case 0:
+    case "LEVEL_UNSPECIFIED":
+      return Activity_Level.LEVEL_UNSPECIFIED;
+    case 1:
+    case "LEVEL_INFO":
+      return Activity_Level.LEVEL_INFO;
+    case 2:
+    case "LEVEL_WARN":
+      return Activity_Level.LEVEL_WARN;
+    case 3:
+    case "LEVEL_ERROR":
+      return Activity_Level.LEVEL_ERROR;
+    case -1:
+    case "UNRECOGNIZED":
+    default:
+      return Activity_Level.UNRECOGNIZED;
+  }
+}
+
+export function activity_LevelToNumber(object: Activity_Level): number {
+  switch (object) {
+    case Activity_Level.LEVEL_UNSPECIFIED:
+      return 0;
+    case Activity_Level.LEVEL_INFO:
+      return 1;
+    case Activity_Level.LEVEL_WARN:
+      return 2;
+    case Activity_Level.LEVEL_ERROR:
+      return 3;
+    case Activity_Level.UNRECOGNIZED:
+    default:
+      return -1;
+  }
+}
+
 export interface ActivityPayload {
+  /** Memo comment activity payload. */
   memoComment?: ActivityMemoCommentPayload | undefined;
 }
 
@@ -41,13 +135,42 @@ export interface ActivityPayload {
 export interface ActivityMemoCommentPayload {
   /**
    * The memo name of comment.
-   * Refer to `Memo.name`.
+   * Format: memos/{memo}
    */
   memo: string;
-  /** The name of related memo. */
+  /**
+   * The name of related memo.
+   * Format: memos/{memo}
+   */
   relatedMemo: string;
 }
 
+export interface ListActivitiesRequest {
+  /**
+   * The maximum number of activities to return.
+   * The service may return fewer than this value.
+   * If unspecified, at most 100 activities will be returned.
+   * The maximum value is 1000; values above 1000 will be coerced to 1000.
+   */
+  pageSize: number;
+  /**
+   * A page token, received from a previous `ListActivities` call.
+   * Provide this to retrieve the subsequent page.
+   */
+  pageToken: string;
+}
+
+export interface ListActivitiesResponse {
+  /** The activities. */
+  activities: Activity[];
+  /**
+   * A token to retrieve the next page of results.
+   * Pass this value in the page_token field in the subsequent call to `ListActivities`
+   * method to retrieve the next page of results.
+   */
+  nextPageToken: string;
+}
+
 export interface GetActivityRequest {
   /**
    * The name of the activity.
@@ -57,7 +180,14 @@ export interface GetActivityRequest {
 }
 
 function createBaseActivity(): Activity {
-  return { name: "", creator: "", type: "", level: "", createTime: undefined, payload: undefined };
+  return {
+    name: "",
+    creator: "",
+    type: Activity_Type.TYPE_UNSPECIFIED,
+    level: Activity_Level.LEVEL_UNSPECIFIED,
+    createTime: undefined,
+    payload: undefined,
+  };
 }
 
 export const Activity: MessageFns<Activity> = {
@@ -68,11 +198,11 @@ export const Activity: MessageFns<Activity> = {
     if (message.creator !== "") {
       writer.uint32(18).string(message.creator);
     }
-    if (message.type !== "") {
-      writer.uint32(26).string(message.type);
+    if (message.type !== Activity_Type.TYPE_UNSPECIFIED) {
+      writer.uint32(24).int32(activity_TypeToNumber(message.type));
     }
-    if (message.level !== "") {
-      writer.uint32(34).string(message.level);
+    if (message.level !== Activity_Level.LEVEL_UNSPECIFIED) {
+      writer.uint32(32).int32(activity_LevelToNumber(message.level));
     }
     if (message.createTime !== undefined) {
       Timestamp.encode(toTimestamp(message.createTime), writer.uint32(42).fork()).join();
@@ -107,19 +237,19 @@ export const Activity: MessageFns<Activity> = {
           continue;
         }
         case 3: {
-          if (tag !== 26) {
+          if (tag !== 24) {
             break;
           }
 
-          message.type = reader.string();
+          message.type = activity_TypeFromJSON(reader.int32());
           continue;
         }
         case 4: {
-          if (tag !== 34) {
+          if (tag !== 32) {
             break;
           }
 
-          message.level = reader.string();
+          message.level = activity_LevelFromJSON(reader.int32());
           continue;
         }
         case 5: {
@@ -154,8 +284,8 @@ export const Activity: MessageFns<Activity> = {
     const message = createBaseActivity();
     message.name = object.name ?? "";
     message.creator = object.creator ?? "";
-    message.type = object.type ?? "";
-    message.level = object.level ?? "";
+    message.type = object.type ?? Activity_Type.TYPE_UNSPECIFIED;
+    message.level = object.level ?? Activity_Level.LEVEL_UNSPECIFIED;
     message.createTime = object.createTime ?? undefined;
     message.payload = (object.payload !== undefined && object.payload !== null)
       ? ActivityPayload.fromPartial(object.payload)
@@ -270,6 +400,122 @@ export const ActivityMemoCommentPayload: MessageFns<ActivityMemoCommentPayload>
   },
 };
 
+function createBaseListActivitiesRequest(): ListActivitiesRequest {
+  return { pageSize: 0, pageToken: "" };
+}
+
+export const ListActivitiesRequest: MessageFns<ListActivitiesRequest> = {
+  encode(message: ListActivitiesRequest, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    if (message.pageSize !== 0) {
+      writer.uint32(8).int32(message.pageSize);
+    }
+    if (message.pageToken !== "") {
+      writer.uint32(18).string(message.pageToken);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): ListActivitiesRequest {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseListActivitiesRequest();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 8) {
+            break;
+          }
+
+          message.pageSize = reader.int32();
+          continue;
+        }
+        case 2: {
+          if (tag !== 18) {
+            break;
+          }
+
+          message.pageToken = reader.string();
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<ListActivitiesRequest>): ListActivitiesRequest {
+    return ListActivitiesRequest.fromPartial(base ?? {});
+  },
+  fromPartial(object: DeepPartial<ListActivitiesRequest>): ListActivitiesRequest {
+    const message = createBaseListActivitiesRequest();
+    message.pageSize = object.pageSize ?? 0;
+    message.pageToken = object.pageToken ?? "";
+    return message;
+  },
+};
+
+function createBaseListActivitiesResponse(): ListActivitiesResponse {
+  return { activities: [], nextPageToken: "" };
+}
+
+export const ListActivitiesResponse: MessageFns<ListActivitiesResponse> = {
+  encode(message: ListActivitiesResponse, writer: BinaryWriter = new BinaryWriter()): BinaryWriter {
+    for (const v of message.activities) {
+      Activity.encode(v!, writer.uint32(10).fork()).join();
+    }
+    if (message.nextPageToken !== "") {
+      writer.uint32(18).string(message.nextPageToken);
+    }
+    return writer;
+  },
+
+  decode(input: BinaryReader | Uint8Array, length?: number): ListActivitiesResponse {
+    const reader = input instanceof BinaryReader ? input : new BinaryReader(input);
+    let end = length === undefined ? reader.len : reader.pos + length;
+    const message = createBaseListActivitiesResponse();
+    while (reader.pos < end) {
+      const tag = reader.uint32();
+      switch (tag >>> 3) {
+        case 1: {
+          if (tag !== 10) {
+            break;
+          }
+
+          message.activities.push(Activity.decode(reader, reader.uint32()));
+          continue;
+        }
+        case 2: {
+          if (tag !== 18) {
+            break;
+          }
+
+          message.nextPageToken = reader.string();
+          continue;
+        }
+      }
+      if ((tag & 7) === 4 || tag === 0) {
+        break;
+      }
+      reader.skip(tag & 7);
+    }
+    return message;
+  },
+
+  create(base?: DeepPartial<ListActivitiesResponse>): ListActivitiesResponse {
+    return ListActivitiesResponse.fromPartial(base ?? {});
+  },
+  fromPartial(object: DeepPartial<ListActivitiesResponse>): ListActivitiesResponse {
+    const message = createBaseListActivitiesResponse();
+    message.activities = object.activities?.map((e) => Activity.fromPartial(e)) || [];
+    message.nextPageToken = object.nextPageToken ?? "";
+    return message;
+  },
+};
+
 function createBaseGetActivityRequest(): GetActivityRequest {
   return { name: "" };
 }
@@ -321,6 +567,43 @@ export const ActivityServiceDefinition = {
   name: "ActivityService",
   fullName: "memos.api.v1.ActivityService",
   methods: {
+    /** ListActivities returns a list of activities. */
+    listActivities: {
+      name: "ListActivities",
+      requestType: ListActivitiesRequest,
+      requestStream: false,
+      responseType: ListActivitiesResponse,
+      responseStream: false,
+      options: {
+        _unknownFields: {
+          578365826: [
+            new Uint8Array([
+              20,
+              18,
+              18,
+              47,
+              97,
+              112,
+              105,
+              47,
+              118,
+              49,
+              47,
+              97,
+              99,
+              116,
+              105,
+              118,
+              105,
+              116,
+              105,
+              101,
+              115,
+            ]),
+          ],
+        },
+      },
+    },
     /** GetActivity returns the activity with the given id. */
     getActivity: {
       name: "GetActivity",