diff --git a/api/v1/activity.go b/api/v1/activity.go
deleted file mode 100644
index e667d802..00000000
--- a/api/v1/activity.go
+++ /dev/null
@@ -1,136 +0,0 @@
-package v1
-
-import "github.com/usememos/memos/server/profile"
-
-// ActivityType is the type for an activity.
-type ActivityType string
-
-const (
-	// User related.
-
-	// ActivityUserCreate is the type for creating users.
-	ActivityUserCreate ActivityType = "user.create"
-	// ActivityUserUpdate is the type for updating users.
-	ActivityUserUpdate ActivityType = "user.update"
-	// ActivityUserDelete is the type for deleting users.
-	ActivityUserDelete ActivityType = "user.delete"
-	// ActivityUserAuthSignIn is the type for user signin.
-	ActivityUserAuthSignIn ActivityType = "user.auth.signin"
-	// ActivityUserAuthSignUp is the type for user signup.
-	ActivityUserAuthSignUp ActivityType = "user.auth.signup"
-	// ActivityUserSettingUpdate is the type for updating user settings.
-	ActivityUserSettingUpdate ActivityType = "user.setting.update"
-
-	// Memo related.
-
-	// ActivityMemoCreate is the type for creating memos.
-	ActivityMemoCreate ActivityType = "memo.create"
-	// ActivityMemoView is the type for viewing memos.
-	ActivityMemoView ActivityType = "memo.view"
-	// ActivityMemoUpdate is the type for updating memos.
-	ActivityMemoUpdate ActivityType = "memo.update"
-	// ActivityMemoDelete is the type for deleting memos.
-	ActivityMemoDelete ActivityType = "memo.delete"
-
-	// Resource related.
-
-	// ActivityResourceCreate is the type for creating resources.
-	ActivityResourceCreate ActivityType = "resource.create"
-	// ActivityResourceDelete is the type for deleting resources.
-	ActivityResourceDelete ActivityType = "resource.delete"
-
-	// Tag related.
-
-	// ActivityTagCreate is the type for creating tags.
-	ActivityTagCreate ActivityType = "tag.create"
-	// ActivityTagDelete is the type for deleting tags.
-	ActivityTagDelete ActivityType = "tag.delete"
-
-	// Server related.
-
-	// ActivityServerStart is the type for starting server.
-	ActivityServerStart ActivityType = "server.start"
-)
-
-func (t ActivityType) String() string {
-	return string(t)
-}
-
-// ActivityLevel is the level of activities.
-type ActivityLevel string
-
-const (
-	// ActivityInfo is the INFO level of activities.
-	ActivityInfo ActivityLevel = "INFO"
-	// ActivityWarn is the WARN level of activities.
-	ActivityWarn ActivityLevel = "WARN"
-	// ActivityError is the ERROR level of activities.
-	ActivityError ActivityLevel = "ERROR"
-)
-
-func (l ActivityLevel) String() string {
-	return string(l)
-}
-
-type ActivityUserCreatePayload struct {
-	UserID   int32  `json:"userId"`
-	Username string `json:"username"`
-	Role     Role   `json:"role"`
-}
-
-type ActivityUserAuthSignInPayload struct {
-	UserID int32  `json:"userId"`
-	IP     string `json:"ip"`
-}
-
-type ActivityUserAuthSignUpPayload struct {
-	Username string `json:"username"`
-	IP       string `json:"ip"`
-}
-
-type ActivityMemoCreatePayload struct {
-	MemoID int32 `json:"memoId"`
-}
-
-type ActivityMemoViewPayload struct {
-	MemoID int32 `json:"memoId"`
-}
-
-type ActivityResourceCreatePayload struct {
-	Filename string `json:"filename"`
-	Type     string `json:"type"`
-	Size     int64  `json:"size"`
-}
-
-type ActivityTagCreatePayload struct {
-	TagName string `json:"tagName"`
-}
-
-type ActivityServerStartPayload struct {
-	ServerID string           `json:"serverId"`
-	Profile  *profile.Profile `json:"profile"`
-}
-
-type Activity struct {
-	ID int32 `json:"id"`
-
-	// Standard fields
-	CreatorID int32 `json:"creatorId"`
-	CreatedTs int64 `json:"createdTs"`
-
-	// Domain specific fields
-	Type    ActivityType  `json:"type"`
-	Level   ActivityLevel `json:"level"`
-	Payload string        `json:"payload"`
-}
-
-// ActivityCreate is the API message for creating an activity.
-type ActivityCreate struct {
-	// Standard fields
-	CreatorID int32
-
-	// Domain specific fields
-	Type    ActivityType `json:"type"`
-	Level   ActivityLevel
-	Payload string `json:"payload"`
-}
diff --git a/api/v1/auth.go b/api/v1/auth.go
index 389d1a72..ae15300b 100644
--- a/api/v1/auth.go
+++ b/api/v1/auth.go
@@ -117,9 +117,6 @@ func (s *APIV1Service) SignIn(c echo.Context) error {
 	if err := s.UpsertAccessTokenToStore(ctx, user, accessToken); err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("failed to upsert access token, err: %s", err)).SetInternal(err)
 	}
-	if err := s.createAuthSignInActivity(c, user); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 	cookieExp := time.Now().Add(auth.CookieExpDuration)
 	setTokenCookie(c, auth.AccessTokenCookieName, accessToken, cookieExp)
 	userMessage := convertUserFromStore(user)
@@ -241,9 +238,6 @@ func (s *APIV1Service) SignInSSO(c echo.Context) error {
 	if err := s.UpsertAccessTokenToStore(ctx, user, accessToken); err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("failed to upsert access token, err: %s", err)).SetInternal(err)
 	}
-	if err := s.createAuthSignInActivity(c, user); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 	cookieExp := time.Now().Add(auth.CookieExpDuration)
 	setTokenCookie(c, auth.AccessTokenCookieName, accessToken, cookieExp)
 	userMessage := convertUserFromStore(user)
@@ -366,9 +360,6 @@ func (s *APIV1Service) SignUp(c echo.Context) error {
 	if err := s.UpsertAccessTokenToStore(ctx, user, accessToken); err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("failed to upsert access token, err: %s", err)).SetInternal(err)
 	}
-	if err := s.createAuthSignUpActivity(c, user); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 	cookieExp := time.Now().Add(auth.CookieExpDuration)
 	setTokenCookie(c, auth.AccessTokenCookieName, accessToken, cookieExp)
 	userMessage := convertUserFromStore(user)
@@ -399,50 +390,6 @@ func (s *APIV1Service) UpsertAccessTokenToStore(ctx context.Context, user *store
 	return nil
 }
 
-func (s *APIV1Service) createAuthSignInActivity(c echo.Context, user *store.User) error {
-	ctx := c.Request().Context()
-	payload := ActivityUserAuthSignInPayload{
-		UserID: user.ID,
-		IP:     echo.ExtractIPFromRealIPHeader()(c.Request()),
-	}
-	payloadBytes, err := json.Marshal(payload)
-	if err != nil {
-		return errors.Wrap(err, "failed to marshal activity payload")
-	}
-	activity, err := s.Store.CreateActivity(ctx, &store.Activity{
-		CreatorID: user.ID,
-		Type:      string(ActivityUserAuthSignIn),
-		Level:     string(ActivityInfo),
-		Payload:   string(payloadBytes),
-	})
-	if err != nil || activity == nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-	return err
-}
-
-func (s *APIV1Service) createAuthSignUpActivity(c echo.Context, user *store.User) error {
-	ctx := c.Request().Context()
-	payload := ActivityUserAuthSignUpPayload{
-		Username: user.Username,
-		IP:       echo.ExtractIPFromRealIPHeader()(c.Request()),
-	}
-	payloadBytes, err := json.Marshal(payload)
-	if err != nil {
-		return errors.Wrap(err, "failed to marshal activity payload")
-	}
-	activity, err := s.Store.CreateActivity(ctx, &store.Activity{
-		CreatorID: user.ID,
-		Type:      string(ActivityUserAuthSignUp),
-		Level:     string(ActivityInfo),
-		Payload:   string(payloadBytes),
-	})
-	if err != nil || activity == nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-	return err
-}
-
 // removeAccessTokenAndCookies removes the jwt token from the cookies.
 func removeAccessTokenAndCookies(c echo.Context) {
 	cookieExp := time.Now().Add(-1 * time.Hour)
diff --git a/api/v1/memo.go b/api/v1/memo.go
index 3fbc7663..c1ac9133 100644
--- a/api/v1/memo.go
+++ b/api/v1/memo.go
@@ -319,9 +319,6 @@ func (s *APIV1Service) CreateMemo(c echo.Context) error {
 	if err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create memo").SetInternal(err)
 	}
-	if err := s.createMemoCreateActivity(ctx, memo); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 
 	for _, resourceID := range createMemoRequest.ResourceIDList {
 		if _, err := s.Store.UpdateResource(ctx, &store.UpdateResource{
@@ -340,6 +337,18 @@ func (s *APIV1Service) CreateMemo(c echo.Context) error {
 		}); err != nil {
 			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to upsert memo relation").SetInternal(err)
 		}
+		if memoRelationUpsert.Type == MemoRelationComment {
+			relatedMemo, err := s.Store.GetMemo(ctx, &store.FindMemo{
+				ID: &memoRelationUpsert.RelatedMemoID,
+			})
+			if err != nil {
+				return echo.NewHTTPError(http.StatusInternalServerError, "Failed to get related memo").SetInternal(err)
+			}
+			// nolint
+			if relatedMemo.CreatorID != memo.CreatorID {
+				// TODO: When a memo is commented by others, send notification to the memo creator.
+			}
+		}
 	}
 
 	composedMemo, err := s.Store.GetMemo(ctx, &store.FindMemo{
@@ -567,9 +576,6 @@ func (s *APIV1Service) GetMemo(c echo.Context) error {
 			return echo.NewHTTPError(http.StatusForbidden, "this memo is protected, missing user in session")
 		}
 	}
-	if err := s.createMemoViewActivity(c, memo, userID); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 	memoResponse, err := s.convertMemoFromStore(ctx, memo)
 	if err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to compose memo response").SetInternal(err)
@@ -766,47 +772,6 @@ func (s *APIV1Service) UpdateMemo(c echo.Context) error {
 	return c.JSON(http.StatusOK, memoResponse)
 }
 
-func (s *APIV1Service) createMemoCreateActivity(ctx context.Context, memo *store.Memo) error {
-	payload := ActivityMemoCreatePayload{
-		MemoID: memo.ID,
-	}
-	payloadBytes, err := json.Marshal(payload)
-	if err != nil {
-		return errors.Wrap(err, "failed to marshal activity payload")
-	}
-	activity, err := s.Store.CreateActivity(ctx, &store.Activity{
-		CreatorID: memo.CreatorID,
-		Type:      ActivityMemoCreate.String(),
-		Level:     ActivityInfo.String(),
-		Payload:   string(payloadBytes),
-	})
-	if err != nil || activity == nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-	return err
-}
-
-func (s *APIV1Service) createMemoViewActivity(c echo.Context, memo *store.Memo, userID int32) error {
-	ctx := c.Request().Context()
-	payload := ActivityMemoViewPayload{
-		MemoID: memo.ID,
-	}
-	payloadBytes, err := json.Marshal(payload)
-	if err != nil {
-		return errors.Wrap(err, "failed to marshal activity payload")
-	}
-	activity, err := s.Store.CreateActivity(ctx, &store.Activity{
-		CreatorID: userID,
-		Type:      string(ActivityMemoView),
-		Level:     string(ActivityInfo),
-		Payload:   string(payloadBytes),
-	})
-	if err != nil || activity == nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-	return err
-}
-
 func (s *APIV1Service) convertMemoFromStore(ctx context.Context, memo *store.Memo) (*Memo, error) {
 	memoResponse := &Memo{
 		ID:         memo.ID,
diff --git a/api/v1/memo_relation.go b/api/v1/memo_relation.go
index a2d80bbb..61350af8 100644
--- a/api/v1/memo_relation.go
+++ b/api/v1/memo_relation.go
@@ -14,8 +14,8 @@ import (
 type MemoRelationType string
 
 const (
-	MemoRelationReference  MemoRelationType = "REFERENCE"
-	MemoRelationAdditional MemoRelationType = "ADDITIONAL"
+	MemoRelationReference MemoRelationType = "REFERENCE"
+	MemoRelationComment   MemoRelationType = "COMMENT"
 )
 
 type MemoRelation struct {
diff --git a/api/v1/resource.go b/api/v1/resource.go
index 61ca18a7..fc1ca1e9 100644
--- a/api/v1/resource.go
+++ b/api/v1/resource.go
@@ -161,9 +161,6 @@ func (s *APIV1Service) CreateResource(c echo.Context) error {
 	if err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create resource").SetInternal(err)
 	}
-	if err := s.createResourceCreateActivity(ctx, resource); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 	return c.JSON(http.StatusOK, convertResourceFromStore(resource))
 }
 
@@ -233,9 +230,6 @@ func (s *APIV1Service) UploadResource(c echo.Context) error {
 	if err != nil {
 		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create resource").SetInternal(err)
 	}
-	if err := s.createResourceCreateActivity(ctx, resource); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 	return c.JSON(http.StatusOK, convertResourceFromStore(resource))
 }
 
@@ -353,28 +347,6 @@ func (s *APIV1Service) UpdateResource(c echo.Context) error {
 	return c.JSON(http.StatusOK, convertResourceFromStore(resource))
 }
 
-func (s *APIV1Service) createResourceCreateActivity(ctx context.Context, resource *store.Resource) error {
-	payload := ActivityResourceCreatePayload{
-		Filename: resource.Filename,
-		Type:     resource.Type,
-		Size:     resource.Size,
-	}
-	payloadBytes, err := json.Marshal(payload)
-	if err != nil {
-		return errors.Wrap(err, "failed to marshal activity payload")
-	}
-	activity, err := s.Store.CreateActivity(ctx, &store.Activity{
-		CreatorID: resource.CreatorID,
-		Type:      ActivityResourceCreate.String(),
-		Level:     ActivityInfo.String(),
-		Payload:   string(payloadBytes),
-	})
-	if err != nil || activity == nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-	return err
-}
-
 func replacePathTemplate(path, filename string) string {
 	t := time.Now()
 	path = fileKeyPattern.ReplaceAllStringFunc(path, func(s string) string {
diff --git a/api/v1/tag.go b/api/v1/tag.go
index 31163637..e75416a2 100644
--- a/api/v1/tag.go
+++ b/api/v1/tag.go
@@ -8,7 +8,6 @@ import (
 	"sort"
 
 	"github.com/labstack/echo/v4"
-	"github.com/pkg/errors"
 	"golang.org/x/exp/slices"
 
 	"github.com/usememos/memos/store"
@@ -99,9 +98,6 @@ func (s *APIV1Service) CreateTag(c echo.Context) error {
 		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to upsert tag").SetInternal(err)
 	}
 	tagMessage := convertTagFromStore(tag)
-	if err := s.createTagCreateActivity(c, tagMessage); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 	return c.JSON(http.StatusOK, tagMessage.Name)
 }
 
@@ -196,27 +192,6 @@ func (s *APIV1Service) GetTagSuggestion(c echo.Context) error {
 	return c.JSON(http.StatusOK, tagList)
 }
 
-func (s *APIV1Service) createTagCreateActivity(c echo.Context, tag *Tag) error {
-	ctx := c.Request().Context()
-	payload := ActivityTagCreatePayload{
-		TagName: tag.Name,
-	}
-	payloadBytes, err := json.Marshal(payload)
-	if err != nil {
-		return errors.Wrap(err, "failed to marshal activity payload")
-	}
-	activity, err := s.Store.CreateActivity(ctx, &store.Activity{
-		CreatorID: tag.CreatorID,
-		Type:      ActivityTagCreate.String(),
-		Level:     ActivityInfo.String(),
-		Payload:   string(payloadBytes),
-	})
-	if err != nil || activity == nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-	return err
-}
-
 func convertTagFromStore(tag *store.Tag) *Tag {
 	return &Tag{
 		Name:      tag.Name,
diff --git a/api/v1/user.go b/api/v1/user.go
index 268d6c48..dbb69739 100644
--- a/api/v1/user.go
+++ b/api/v1/user.go
@@ -167,9 +167,6 @@ func (s *APIV1Service) CreateUser(c echo.Context) error {
 	}
 
 	userMessage := convertUserFromStore(user)
-	if err := s.createUserCreateActivity(c, userMessage); err != nil {
-		return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
-	}
 	metric.Enqueue("user create")
 	return c.JSON(http.StatusOK, userMessage)
 }
@@ -473,29 +470,6 @@ func (update UpdateUserRequest) Validate() error {
 	return nil
 }
 
-func (s *APIV1Service) createUserCreateActivity(c echo.Context, user *User) error {
-	ctx := c.Request().Context()
-	payload := ActivityUserCreatePayload{
-		UserID:   user.ID,
-		Username: user.Username,
-		Role:     user.Role,
-	}
-	payloadBytes, err := json.Marshal(payload)
-	if err != nil {
-		return errors.Wrap(err, "failed to marshal activity payload")
-	}
-	activity, err := s.Store.CreateActivity(ctx, &store.Activity{
-		CreatorID: user.ID,
-		Type:      ActivityUserCreate.String(),
-		Level:     ActivityInfo.String(),
-		Payload:   string(payloadBytes),
-	})
-	if err != nil || activity == nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-	return err
-}
-
 func convertUserFromStore(user *store.User) *User {
 	return &User{
 		ID:           user.ID,
diff --git a/api/v2/inbox_service .go b/api/v2/inbox_service .go
index d2ae311f..1d78dc52 100644
--- a/api/v2/inbox_service .go	
+++ b/api/v2/inbox_service .go	
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/pkg/errors"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 
@@ -87,14 +88,27 @@ func (s *APIV2Service) DeleteInbox(ctx context.Context, request *apiv2pb.DeleteI
 	return &apiv2pb.DeleteInboxResponse{}, nil
 }
 
-func (*APIV2Service) convertInboxFromStore(_ context.Context, inbox *store.Inbox) (*apiv2pb.Inbox, error) {
-	// TODO: convert sender and receiver.
+func (s *APIV2Service) convertInboxFromStore(ctx context.Context, inbox *store.Inbox) (*apiv2pb.Inbox, error) {
+	sender, err := s.Store.GetUser(ctx, &store.FindUser{
+		ID: &inbox.SenderID,
+	})
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to get sender")
+	}
+	receiver, err := s.Store.GetUser(ctx, &store.FindUser{
+		ID: &inbox.ReceiverID,
+	})
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to get receiver")
+	}
+
 	return &apiv2pb.Inbox{
-		Name:    fmt.Sprintf("inbox/%d", inbox.ID),
-		Status:  convertInboxStatusFromStore(inbox.Status),
-		Title:   inbox.Message.Title,
-		Content: inbox.Message.Content,
-		Link:    inbox.Message.Link,
+		Name:       fmt.Sprintf("inbox/%d", inbox.ID),
+		Sender:     fmt.Sprintf("users/%s", sender.Username),
+		Receiver:   fmt.Sprintf("users/%s", receiver.Username),
+		Status:     convertInboxStatusFromStore(inbox.Status),
+		Type:       apiv2pb.Inbox_Type(inbox.Message.Type),
+		ActivityId: inbox.Message.ActivityId,
 	}, nil
 }
 
diff --git a/proto/api/v2/inbox_service.proto b/proto/api/v2/inbox_service.proto
index aaf9fdc8..eb68b7b9 100644
--- a/proto/api/v2/inbox_service.proto
+++ b/proto/api/v2/inbox_service.proto
@@ -44,11 +44,13 @@ message Inbox {
   }
   Status status = 4;
 
-  string title = 5;
-
-  string content = 6;
+  enum Type {
+    TYPE_UNSPECIFIED = 0;
+    TYPE_MEMO_COMMENT = 1;
+  }
+  Type type = 5;
 
-  string link = 7;
+  optional int32 activity_id = 6;
 }
 
 message ListInboxRequest {
diff --git a/proto/gen/api/v2/README.md b/proto/gen/api/v2/README.md
index 7de3b3de..31f5baba 100644
--- a/proto/gen/api/v2/README.md
+++ b/proto/gen/api/v2/README.md
@@ -16,6 +16,7 @@
     - [UpdateInboxResponse](#memos-api-v2-UpdateInboxResponse)
   
     - [Inbox.Status](#memos-api-v2-Inbox-Status)
+    - [Inbox.Type](#memos-api-v2-Inbox-Type)
   
     - [InboxService](#memos-api-v2-InboxService)
   
@@ -166,9 +167,8 @@
 | sender | [string](#string) |  | Format: users/{username} |
 | receiver | [string](#string) |  | Format: users/{username} |
 | status | [Inbox.Status](#memos-api-v2-Inbox-Status) |  |  |
-| title | [string](#string) |  |  |
-| content | [string](#string) |  |  |
-| link | [string](#string) |  |  |
+| type | [Inbox.Type](#memos-api-v2-Inbox-Type) |  |  |
+| activity_id | [int32](#int32) | optional |  |
 
 
 
@@ -251,6 +251,18 @@
 | ARCHIVED | 3 |  |
 
 
+
+<a name="memos-api-v2-Inbox-Type"></a>
+
+### Inbox.Type
+
+
+| Name | Number | Description |
+| ---- | ------ | ----------- |
+| TYPE_UNSPECIFIED | 0 |  |
+| TYPE_MEMO_COMMENT | 1 |  |
+
+
  
 
  
diff --git a/proto/gen/api/v2/inbox_service.pb.go b/proto/gen/api/v2/inbox_service.pb.go
index d2b1e0cb..f7bba2d3 100644
--- a/proto/gen/api/v2/inbox_service.pb.go
+++ b/proto/gen/api/v2/inbox_service.pb.go
@@ -74,6 +74,52 @@ func (Inbox_Status) EnumDescriptor() ([]byte, []int) {
 	return file_api_v2_inbox_service_proto_rawDescGZIP(), []int{0, 0}
 }
 
+type Inbox_Type int32
+
+const (
+	Inbox_TYPE_UNSPECIFIED  Inbox_Type = 0
+	Inbox_TYPE_MEMO_COMMENT Inbox_Type = 1
+)
+
+// Enum value maps for Inbox_Type.
+var (
+	Inbox_Type_name = map[int32]string{
+		0: "TYPE_UNSPECIFIED",
+		1: "TYPE_MEMO_COMMENT",
+	}
+	Inbox_Type_value = map[string]int32{
+		"TYPE_UNSPECIFIED":  0,
+		"TYPE_MEMO_COMMENT": 1,
+	}
+)
+
+func (x Inbox_Type) Enum() *Inbox_Type {
+	p := new(Inbox_Type)
+	*p = x
+	return p
+}
+
+func (x Inbox_Type) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Inbox_Type) Descriptor() protoreflect.EnumDescriptor {
+	return file_api_v2_inbox_service_proto_enumTypes[1].Descriptor()
+}
+
+func (Inbox_Type) Type() protoreflect.EnumType {
+	return &file_api_v2_inbox_service_proto_enumTypes[1]
+}
+
+func (x Inbox_Type) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Inbox_Type.Descriptor instead.
+func (Inbox_Type) EnumDescriptor() ([]byte, []int) {
+	return file_api_v2_inbox_service_proto_rawDescGZIP(), []int{0, 1}
+}
+
 type Inbox struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -85,11 +131,10 @@ type Inbox struct {
 	// Format: users/{username}
 	Sender string `protobuf:"bytes,2,opt,name=sender,proto3" json:"sender,omitempty"`
 	// Format: users/{username}
-	Receiver string       `protobuf:"bytes,3,opt,name=receiver,proto3" json:"receiver,omitempty"`
-	Status   Inbox_Status `protobuf:"varint,4,opt,name=status,proto3,enum=memos.api.v2.Inbox_Status" json:"status,omitempty"`
-	Title    string       `protobuf:"bytes,5,opt,name=title,proto3" json:"title,omitempty"`
-	Content  string       `protobuf:"bytes,6,opt,name=content,proto3" json:"content,omitempty"`
-	Link     string       `protobuf:"bytes,7,opt,name=link,proto3" json:"link,omitempty"`
+	Receiver   string       `protobuf:"bytes,3,opt,name=receiver,proto3" json:"receiver,omitempty"`
+	Status     Inbox_Status `protobuf:"varint,4,opt,name=status,proto3,enum=memos.api.v2.Inbox_Status" json:"status,omitempty"`
+	Type       Inbox_Type   `protobuf:"varint,5,opt,name=type,proto3,enum=memos.api.v2.Inbox_Type" json:"type,omitempty"`
+	ActivityId *int32       `protobuf:"varint,6,opt,name=activity_id,json=activityId,proto3,oneof" json:"activity_id,omitempty"`
 }
 
 func (x *Inbox) Reset() {
@@ -152,25 +197,18 @@ func (x *Inbox) GetStatus() Inbox_Status {
 	return Inbox_STATUS_UNSPECIFIED
 }
 
-func (x *Inbox) GetTitle() string {
+func (x *Inbox) GetType() Inbox_Type {
 	if x != nil {
-		return x.Title
+		return x.Type
 	}
-	return ""
-}
-
-func (x *Inbox) GetContent() string {
-	if x != nil {
-		return x.Content
-	}
-	return ""
+	return Inbox_TYPE_UNSPECIFIED
 }
 
-func (x *Inbox) GetLink() string {
-	if x != nil {
-		return x.Link
+func (x *Inbox) GetActivityId() int32 {
+	if x != nil && x.ActivityId != nil {
+		return *x.ActivityId
 	}
-	return ""
+	return 0
 }
 
 type ListInboxRequest struct {
@@ -468,7 +506,7 @@ var file_api_v2_inbox_service_proto_rawDesc = []byte{
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+	0x22, 0x15, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x0f, 0x12, 0x0d, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x76,
+	0x32, 0x2f, 0x69, 0x6e, 0x62, 0x6f, 0x78, 0x12, 0x80, 0x01, 0x0a, 0x0b, 0x55, 0x70, 0x64, 0x61,
+	0x74, 0x65, 0x49, 0x6e, 0x62, 0x6f, 0x78, 0x12, 0x20, 0x2e, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e,
+	0x61, 0x70, 0x69, 0x2e, 0x76, 0x32, 0x2e, 0x55, 0x70, 0x64, 0x61, 0x74, 0x65, 0x49, 0x6e, 0x62,
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+	0x73, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x76, 0x32, 0x2e, 0x55, 0x70, 0x64, 0x61, 0x74, 0x65, 0x49,
+	0x6e, 0x62, 0x6f, 0x78, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x2c, 0xda, 0x41,
+	0x11, 0x69, 0x6e, 0x62, 0x6f, 0x78, 0x2c, 0x75, 0x70, 0x64, 0x61, 0x74, 0x65, 0x5f, 0x6d, 0x61,
+	0x73, 0x6b, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x12, 0x3a, 0x05, 0x69, 0x6e, 0x62, 0x6f, 0x78, 0x32,
+	0x09, 0x2f, 0x76, 0x32, 0x2f, 0x69, 0x6e, 0x62, 0x6f, 0x78, 0x12, 0x75, 0x0a, 0x0b, 0x44, 0x65,
+	0x6c, 0x65, 0x74, 0x65, 0x49, 0x6e, 0x62, 0x6f, 0x78, 0x12, 0x20, 0x2e, 0x6d, 0x65, 0x6d, 0x6f,
+	0x73, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x76, 0x32, 0x2e, 0x44, 0x65, 0x6c, 0x65, 0x74, 0x65, 0x49,
+	0x6e, 0x62, 0x6f, 0x78, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x21, 0x2e, 0x6d, 0x65,
+	0x6d, 0x6f, 0x73, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x76, 0x32, 0x2e, 0x44, 0x65, 0x6c, 0x65, 0x74,
+	0x65, 0x49, 0x6e, 0x62, 0x6f, 0x78, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x21,
+	0xda, 0x41, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x14, 0x2a, 0x12, 0x2f,
+	0x76, 0x32, 0x2f, 0x7b, 0x6e, 0x61, 0x6d, 0x65, 0x3d, 0x69, 0x6e, 0x62, 0x6f, 0x78, 0x2f, 0x2a,
+	0x7d, 0x42, 0xa9, 0x01, 0x0a, 0x10, 0x63, 0x6f, 0x6d, 0x2e, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e,
+	0x61, 0x70, 0x69, 0x2e, 0x76, 0x32, 0x42, 0x11, 0x49, 0x6e, 0x62, 0x6f, 0x78, 0x53, 0x65, 0x72,
+	0x76, 0x69, 0x63, 0x65, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x30, 0x67, 0x69, 0x74,
+	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x75, 0x73, 0x65, 0x6d, 0x65, 0x6d, 0x6f, 0x73,
+	0x2f, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x65, 0x6e,
+	0x2f, 0x61, 0x70, 0x69, 0x2f, 0x76, 0x32, 0x3b, 0x61, 0x70, 0x69, 0x76, 0x32, 0xa2, 0x02, 0x03,
+	0x4d, 0x41, 0x58, 0xaa, 0x02, 0x0c, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x41, 0x70, 0x69, 0x2e,
+	0x56, 0x32, 0xca, 0x02, 0x0c, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x41, 0x70, 0x69, 0x5c, 0x56,
+	0x32, 0xe2, 0x02, 0x18, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x41, 0x70, 0x69, 0x5c, 0x56, 0x32,
+	0x5c, 0x47, 0x50, 0x42, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0xea, 0x02, 0x0e, 0x4d,
+	0x65, 0x6d, 0x6f, 0x73, 0x3a, 0x3a, 0x41, 0x70, 0x69, 0x3a, 0x3a, 0x56, 0x32, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -556,36 +600,38 @@ func file_api_v2_inbox_service_proto_rawDescGZIP() []byte {
 	return file_api_v2_inbox_service_proto_rawDescData
 }
 
-var file_api_v2_inbox_service_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_api_v2_inbox_service_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
 var file_api_v2_inbox_service_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
 var file_api_v2_inbox_service_proto_goTypes = []interface{}{
 	(Inbox_Status)(0),             // 0: memos.api.v2.Inbox.Status
-	(*Inbox)(nil),                 // 1: memos.api.v2.Inbox
-	(*ListInboxRequest)(nil),      // 2: memos.api.v2.ListInboxRequest
-	(*ListInboxResponse)(nil),     // 3: memos.api.v2.ListInboxResponse
-	(*UpdateInboxRequest)(nil),    // 4: memos.api.v2.UpdateInboxRequest
-	(*UpdateInboxResponse)(nil),   // 5: memos.api.v2.UpdateInboxResponse
-	(*DeleteInboxRequest)(nil),    // 6: memos.api.v2.DeleteInboxRequest
-	(*DeleteInboxResponse)(nil),   // 7: memos.api.v2.DeleteInboxResponse
-	(*fieldmaskpb.FieldMask)(nil), // 8: google.protobuf.FieldMask
+	(Inbox_Type)(0),               // 1: memos.api.v2.Inbox.Type
+	(*Inbox)(nil),                 // 2: memos.api.v2.Inbox
+	(*ListInboxRequest)(nil),      // 3: memos.api.v2.ListInboxRequest
+	(*ListInboxResponse)(nil),     // 4: memos.api.v2.ListInboxResponse
+	(*UpdateInboxRequest)(nil),    // 5: memos.api.v2.UpdateInboxRequest
+	(*UpdateInboxResponse)(nil),   // 6: memos.api.v2.UpdateInboxResponse
+	(*DeleteInboxRequest)(nil),    // 7: memos.api.v2.DeleteInboxRequest
+	(*DeleteInboxResponse)(nil),   // 8: memos.api.v2.DeleteInboxResponse
+	(*fieldmaskpb.FieldMask)(nil), // 9: google.protobuf.FieldMask
 }
 var file_api_v2_inbox_service_proto_depIdxs = []int32{
 	0, // 0: memos.api.v2.Inbox.status:type_name -> memos.api.v2.Inbox.Status
-	1, // 1: memos.api.v2.ListInboxResponse.inbox:type_name -> memos.api.v2.Inbox
-	1, // 2: memos.api.v2.UpdateInboxRequest.inbox:type_name -> memos.api.v2.Inbox
-	8, // 3: memos.api.v2.UpdateInboxRequest.update_mask:type_name -> google.protobuf.FieldMask
-	1, // 4: memos.api.v2.UpdateInboxResponse.inbox:type_name -> memos.api.v2.Inbox
-	2, // 5: memos.api.v2.InboxService.ListInbox:input_type -> memos.api.v2.ListInboxRequest
-	4, // 6: memos.api.v2.InboxService.UpdateInbox:input_type -> memos.api.v2.UpdateInboxRequest
-	6, // 7: memos.api.v2.InboxService.DeleteInbox:input_type -> memos.api.v2.DeleteInboxRequest
-	3, // 8: memos.api.v2.InboxService.ListInbox:output_type -> memos.api.v2.ListInboxResponse
-	5, // 9: memos.api.v2.InboxService.UpdateInbox:output_type -> memos.api.v2.UpdateInboxResponse
-	7, // 10: memos.api.v2.InboxService.DeleteInbox:output_type -> memos.api.v2.DeleteInboxResponse
-	8, // [8:11] is the sub-list for method output_type
-	5, // [5:8] is the sub-list for method input_type
-	5, // [5:5] is the sub-list for extension type_name
-	5, // [5:5] is the sub-list for extension extendee
-	0, // [0:5] is the sub-list for field type_name
+	1, // 1: memos.api.v2.Inbox.type:type_name -> memos.api.v2.Inbox.Type
+	2, // 2: memos.api.v2.ListInboxResponse.inbox:type_name -> memos.api.v2.Inbox
+	2, // 3: memos.api.v2.UpdateInboxRequest.inbox:type_name -> memos.api.v2.Inbox
+	9, // 4: memos.api.v2.UpdateInboxRequest.update_mask:type_name -> google.protobuf.FieldMask
+	2, // 5: memos.api.v2.UpdateInboxResponse.inbox:type_name -> memos.api.v2.Inbox
+	3, // 6: memos.api.v2.InboxService.ListInbox:input_type -> memos.api.v2.ListInboxRequest
+	5, // 7: memos.api.v2.InboxService.UpdateInbox:input_type -> memos.api.v2.UpdateInboxRequest
+	7, // 8: memos.api.v2.InboxService.DeleteInbox:input_type -> memos.api.v2.DeleteInboxRequest
+	4, // 9: memos.api.v2.InboxService.ListInbox:output_type -> memos.api.v2.ListInboxResponse
+	6, // 10: memos.api.v2.InboxService.UpdateInbox:output_type -> memos.api.v2.UpdateInboxResponse
+	8, // 11: memos.api.v2.InboxService.DeleteInbox:output_type -> memos.api.v2.DeleteInboxResponse
+	9, // [9:12] is the sub-list for method output_type
+	6, // [6:9] 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_v2_inbox_service_proto_init() }
@@ -679,12 +725,13 @@ func file_api_v2_inbox_service_proto_init() {
 			}
 		}
 	}
+	file_api_v2_inbox_service_proto_msgTypes[0].OneofWrappers = []interface{}{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_api_v2_inbox_service_proto_rawDesc,
-			NumEnums:      1,
+			NumEnums:      2,
 			NumMessages:   7,
 			NumExtensions: 0,
 			NumServices:   1,
diff --git a/proto/gen/store/README.md b/proto/gen/store/README.md
index 05771de1..08e5dc1d 100644
--- a/proto/gen/store/README.md
+++ b/proto/gen/store/README.md
@@ -4,10 +4,15 @@
 ## Table of Contents
 
 - [store/activity.proto](#store_activity-proto)
+    - [ActivityMemoCommentPayload](#memos-store-ActivityMemoCommentPayload)
+    - [ActivityPayload](#memos-store-ActivityPayload)
+  
 - [store/common.proto](#store_common-proto)
 - [store/inbox.proto](#store_inbox-proto)
     - [InboxMessage](#memos-store-InboxMessage)
   
+    - [InboxMessage.Type](#memos-store-InboxMessage-Type)
+  
 - [store/system_setting.proto](#store_system_setting-proto)
     - [BackupConfig](#memos-store-BackupConfig)
   
@@ -30,6 +35,37 @@
 ## store/activity.proto
 
 
+
+<a name="memos-store-ActivityMemoCommentPayload"></a>
+
+### ActivityMemoCommentPayload
+
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| memo_id | [int32](#int32) |  |  |
+| related_memo_id | [int32](#int32) |  |  |
+
+
+
+
+
+
+<a name="memos-store-ActivityPayload"></a>
+
+### ActivityPayload
+
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| memo_comment | [ActivityMemoCommentPayload](#memos-store-ActivityMemoCommentPayload) |  |  |
+
+
+
+
+
  
 
  
@@ -71,9 +107,7 @@
 
 | Field | Type | Label | Description |
 | ----- | ---- | ----- | ----------- |
-| title | [string](#string) |  |  |
-| content | [string](#string) |  |  |
-| link | [string](#string) |  |  |
+| type | [InboxMessage.Type](#memos-store-InboxMessage-Type) |  |  |
 | activity_id | [int32](#int32) | optional |  |
 
 
@@ -82,6 +116,18 @@
 
  
 
+
+<a name="memos-store-InboxMessage-Type"></a>
+
+### InboxMessage.Type
+
+
+| Name | Number | Description |
+| ---- | ------ | ----------- |
+| TYPE_UNSPECIFIED | 0 |  |
+| TYPE_MEMO_COMMENT | 1 |  |
+
+
  
 
  
diff --git a/proto/gen/store/activity.pb.go b/proto/gen/store/activity.pb.go
index 09c5e995..dbf9eb1b 100644
--- a/proto/gen/store/activity.pb.go
+++ b/proto/gen/store/activity.pb.go
@@ -10,6 +10,7 @@ import (
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
+	sync "sync"
 )
 
 const (
@@ -19,31 +20,162 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+type ActivityMemoCommentPayload struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	MemoId        int32 `protobuf:"varint,1,opt,name=memo_id,json=memoId,proto3" json:"memo_id,omitempty"`
+	RelatedMemoId int32 `protobuf:"varint,2,opt,name=related_memo_id,json=relatedMemoId,proto3" json:"related_memo_id,omitempty"`
+}
+
+func (x *ActivityMemoCommentPayload) Reset() {
+	*x = ActivityMemoCommentPayload{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_store_activity_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ActivityMemoCommentPayload) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ActivityMemoCommentPayload) ProtoMessage() {}
+
+func (x *ActivityMemoCommentPayload) ProtoReflect() protoreflect.Message {
+	mi := &file_store_activity_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ActivityMemoCommentPayload.ProtoReflect.Descriptor instead.
+func (*ActivityMemoCommentPayload) Descriptor() ([]byte, []int) {
+	return file_store_activity_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *ActivityMemoCommentPayload) GetMemoId() int32 {
+	if x != nil {
+		return x.MemoId
+	}
+	return 0
+}
+
+func (x *ActivityMemoCommentPayload) GetRelatedMemoId() int32 {
+	if x != nil {
+		return x.RelatedMemoId
+	}
+	return 0
+}
+
+type ActivityPayload struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	MemoComment *ActivityMemoCommentPayload `protobuf:"bytes,1,opt,name=memo_comment,json=memoComment,proto3" json:"memo_comment,omitempty"`
+}
+
+func (x *ActivityPayload) Reset() {
+	*x = ActivityPayload{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_store_activity_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ActivityPayload) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ActivityPayload) ProtoMessage() {}
+
+func (x *ActivityPayload) ProtoReflect() protoreflect.Message {
+	mi := &file_store_activity_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ActivityPayload.ProtoReflect.Descriptor instead.
+func (*ActivityPayload) Descriptor() ([]byte, []int) {
+	return file_store_activity_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *ActivityPayload) GetMemoComment() *ActivityMemoCommentPayload {
+	if x != nil {
+		return x.MemoComment
+	}
+	return nil
+}
+
 var File_store_activity_proto protoreflect.FileDescriptor
 
 var file_store_activity_proto_rawDesc = []byte{
 	0x0a, 0x14, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74, 0x79,
 	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0b, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x73, 0x74,
-	0x6f, 0x72, 0x65, 0x42, 0x98, 0x01, 0x0a, 0x0f, 0x63, 0x6f, 0x6d, 0x2e, 0x6d, 0x65, 0x6d, 0x6f,
-	0x73, 0x2e, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x42, 0x0d, 0x41, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74,
-	0x79, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x29, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62,
-	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x75, 0x73, 0x65, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2f, 0x6d, 0x65,
-	0x6d, 0x6f, 0x73, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x73, 0x74,
-	0x6f, 0x72, 0x65, 0xa2, 0x02, 0x03, 0x4d, 0x53, 0x58, 0xaa, 0x02, 0x0b, 0x4d, 0x65, 0x6d, 0x6f,
-	0x73, 0x2e, 0x53, 0x74, 0x6f, 0x72, 0x65, 0xca, 0x02, 0x0b, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c,
-	0x53, 0x74, 0x6f, 0x72, 0x65, 0xe2, 0x02, 0x17, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x53, 0x74,
-	0x6f, 0x72, 0x65, 0x5c, 0x47, 0x50, 0x42, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0xea,
-	0x02, 0x0c, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x3a, 0x3a, 0x53, 0x74, 0x6f, 0x72, 0x65, 0x62, 0x06,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
-}
-
-var file_store_activity_proto_goTypes = []interface{}{}
+	0x6f, 0x72, 0x65, 0x22, 0x5d, 0x0a, 0x1a, 0x41, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74, 0x79, 0x4d,
+	0x65, 0x6d, 0x6f, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x74, 0x50, 0x61, 0x79, 0x6c, 0x6f, 0x61,
+	0x64, 0x12, 0x17, 0x0a, 0x07, 0x6d, 0x65, 0x6d, 0x6f, 0x5f, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01,
+	0x28, 0x05, 0x52, 0x06, 0x6d, 0x65, 0x6d, 0x6f, 0x49, 0x64, 0x12, 0x26, 0x0a, 0x0f, 0x72, 0x65,
+	0x6c, 0x61, 0x74, 0x65, 0x64, 0x5f, 0x6d, 0x65, 0x6d, 0x6f, 0x5f, 0x69, 0x64, 0x18, 0x02, 0x20,
+	0x01, 0x28, 0x05, 0x52, 0x0d, 0x72, 0x65, 0x6c, 0x61, 0x74, 0x65, 0x64, 0x4d, 0x65, 0x6d, 0x6f,
+	0x49, 0x64, 0x22, 0x5d, 0x0a, 0x0f, 0x41, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74, 0x79, 0x50, 0x61,
+	0x79, 0x6c, 0x6f, 0x61, 0x64, 0x12, 0x4a, 0x0a, 0x0c, 0x6d, 0x65, 0x6d, 0x6f, 0x5f, 0x63, 0x6f,
+	0x6d, 0x6d, 0x65, 0x6e, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x27, 0x2e, 0x6d, 0x65,
+	0x6d, 0x6f, 0x73, 0x2e, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2e, 0x41, 0x63, 0x74, 0x69, 0x76, 0x69,
+	0x74, 0x79, 0x4d, 0x65, 0x6d, 0x6f, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x74, 0x50, 0x61, 0x79,
+	0x6c, 0x6f, 0x61, 0x64, 0x52, 0x0b, 0x6d, 0x65, 0x6d, 0x6f, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e,
+	0x74, 0x42, 0x98, 0x01, 0x0a, 0x0f, 0x63, 0x6f, 0x6d, 0x2e, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e,
+	0x73, 0x74, 0x6f, 0x72, 0x65, 0x42, 0x0d, 0x41, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74, 0x79, 0x50,
+	0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x29, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63,
+	0x6f, 0x6d, 0x2f, 0x75, 0x73, 0x65, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2f, 0x6d, 0x65, 0x6d, 0x6f,
+	0x73, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x73, 0x74, 0x6f, 0x72,
+	0x65, 0xa2, 0x02, 0x03, 0x4d, 0x53, 0x58, 0xaa, 0x02, 0x0b, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x2e,
+	0x53, 0x74, 0x6f, 0x72, 0x65, 0xca, 0x02, 0x0b, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x53, 0x74,
+	0x6f, 0x72, 0x65, 0xe2, 0x02, 0x17, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x53, 0x74, 0x6f, 0x72,
+	0x65, 0x5c, 0x47, 0x50, 0x42, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0xea, 0x02, 0x0c,
+	0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x3a, 0x3a, 0x53, 0x74, 0x6f, 0x72, 0x65, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_store_activity_proto_rawDescOnce sync.Once
+	file_store_activity_proto_rawDescData = file_store_activity_proto_rawDesc
+)
+
+func file_store_activity_proto_rawDescGZIP() []byte {
+	file_store_activity_proto_rawDescOnce.Do(func() {
+		file_store_activity_proto_rawDescData = protoimpl.X.CompressGZIP(file_store_activity_proto_rawDescData)
+	})
+	return file_store_activity_proto_rawDescData
+}
+
+var file_store_activity_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_store_activity_proto_goTypes = []interface{}{
+	(*ActivityMemoCommentPayload)(nil), // 0: memos.store.ActivityMemoCommentPayload
+	(*ActivityPayload)(nil),            // 1: memos.store.ActivityPayload
+}
 var file_store_activity_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	0, // 0: memos.store.ActivityPayload.memo_comment:type_name -> memos.store.ActivityMemoCommentPayload
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
 }
 
 func init() { file_store_activity_proto_init() }
@@ -51,18 +183,45 @@ func file_store_activity_proto_init() {
 	if File_store_activity_proto != nil {
 		return
 	}
+	if !protoimpl.UnsafeEnabled {
+		file_store_activity_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ActivityMemoCommentPayload); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_store_activity_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ActivityPayload); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_store_activity_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   0,
+			NumMessages:   2,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
 		GoTypes:           file_store_activity_proto_goTypes,
 		DependencyIndexes: file_store_activity_proto_depIdxs,
+		MessageInfos:      file_store_activity_proto_msgTypes,
 	}.Build()
 	File_store_activity_proto = out.File
 	file_store_activity_proto_rawDesc = nil
diff --git a/proto/gen/store/inbox.pb.go b/proto/gen/store/inbox.pb.go
index afa88dfc..50ec5a16 100644
--- a/proto/gen/store/inbox.pb.go
+++ b/proto/gen/store/inbox.pb.go
@@ -20,15 +20,59 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+type InboxMessage_Type int32
+
+const (
+	InboxMessage_TYPE_UNSPECIFIED  InboxMessage_Type = 0
+	InboxMessage_TYPE_MEMO_COMMENT InboxMessage_Type = 1
+)
+
+// Enum value maps for InboxMessage_Type.
+var (
+	InboxMessage_Type_name = map[int32]string{
+		0: "TYPE_UNSPECIFIED",
+		1: "TYPE_MEMO_COMMENT",
+	}
+	InboxMessage_Type_value = map[string]int32{
+		"TYPE_UNSPECIFIED":  0,
+		"TYPE_MEMO_COMMENT": 1,
+	}
+)
+
+func (x InboxMessage_Type) Enum() *InboxMessage_Type {
+	p := new(InboxMessage_Type)
+	*p = x
+	return p
+}
+
+func (x InboxMessage_Type) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (InboxMessage_Type) Descriptor() protoreflect.EnumDescriptor {
+	return file_store_inbox_proto_enumTypes[0].Descriptor()
+}
+
+func (InboxMessage_Type) Type() protoreflect.EnumType {
+	return &file_store_inbox_proto_enumTypes[0]
+}
+
+func (x InboxMessage_Type) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use InboxMessage_Type.Descriptor instead.
+func (InboxMessage_Type) EnumDescriptor() ([]byte, []int) {
+	return file_store_inbox_proto_rawDescGZIP(), []int{0, 0}
+}
+
 type InboxMessage struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Title      string `protobuf:"bytes,1,opt,name=title,proto3" json:"title,omitempty"`
-	Content    string `protobuf:"bytes,2,opt,name=content,proto3" json:"content,omitempty"`
-	Link       string `protobuf:"bytes,3,opt,name=link,proto3" json:"link,omitempty"`
-	ActivityId *int32 `protobuf:"varint,4,opt,name=activity_id,json=activityId,proto3,oneof" json:"activity_id,omitempty"`
+	Type       InboxMessage_Type `protobuf:"varint,1,opt,name=type,proto3,enum=memos.store.InboxMessage_Type" json:"type,omitempty"`
+	ActivityId *int32            `protobuf:"varint,2,opt,name=activity_id,json=activityId,proto3,oneof" json:"activity_id,omitempty"`
 }
 
 func (x *InboxMessage) Reset() {
@@ -63,25 +107,11 @@ func (*InboxMessage) Descriptor() ([]byte, []int) {
 	return file_store_inbox_proto_rawDescGZIP(), []int{0}
 }
 
-func (x *InboxMessage) GetTitle() string {
-	if x != nil {
-		return x.Title
-	}
-	return ""
-}
-
-func (x *InboxMessage) GetContent() string {
-	if x != nil {
-		return x.Content
-	}
-	return ""
-}
-
-func (x *InboxMessage) GetLink() string {
+func (x *InboxMessage) GetType() InboxMessage_Type {
 	if x != nil {
-		return x.Link
+		return x.Type
 	}
-	return ""
+	return InboxMessage_TYPE_UNSPECIFIED
 }
 
 func (x *InboxMessage) GetActivityId() int32 {
@@ -96,25 +126,27 @@ var File_store_inbox_proto protoreflect.FileDescriptor
 var file_store_inbox_proto_rawDesc = []byte{
 	0x0a, 0x11, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2f, 0x69, 0x6e, 0x62, 0x6f, 0x78, 0x2e, 0x70, 0x72,
 	0x6f, 0x74, 0x6f, 0x12, 0x0b, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x73, 0x74, 0x6f, 0x72, 0x65,
-	0x22, 0x88, 0x01, 0x0a, 0x0c, 0x49, 0x6e, 0x62, 0x6f, 0x78, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67,
-	0x65, 0x12, 0x14, 0x0a, 0x05, 0x74, 0x69, 0x74, 0x6c, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09,
-	0x52, 0x05, 0x74, 0x69, 0x74, 0x6c, 0x65, 0x12, 0x18, 0x0a, 0x07, 0x63, 0x6f, 0x6e, 0x74, 0x65,
-	0x6e, 0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e,
-	0x74, 0x12, 0x12, 0x0a, 0x04, 0x6c, 0x69, 0x6e, 0x6b, 0x18, 0x03, 0x20, 0x01, 0x28, 0x09, 0x52,
-	0x04, 0x6c, 0x69, 0x6e, 0x6b, 0x12, 0x24, 0x0a, 0x0b, 0x61, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74,
-	0x79, 0x5f, 0x69, 0x64, 0x18, 0x04, 0x20, 0x01, 0x28, 0x05, 0x48, 0x00, 0x52, 0x0a, 0x61, 0x63,
-	0x74, 0x69, 0x76, 0x69, 0x74, 0x79, 0x49, 0x64, 0x88, 0x01, 0x01, 0x42, 0x0e, 0x0a, 0x0c, 0x5f,
-	0x61, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74, 0x79, 0x5f, 0x69, 0x64, 0x42, 0x95, 0x01, 0x0a, 0x0f,
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-	0x6f, 0x72, 0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x22, 0xad, 0x01, 0x0a, 0x0c, 0x49, 0x6e, 0x62, 0x6f, 0x78, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67,
+	0x65, 0x12, 0x32, 0x0a, 0x04, 0x74, 0x79, 0x70, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0e, 0x32,
+	0x1e, 0x2e, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2e, 0x49, 0x6e,
+	0x62, 0x6f, 0x78, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2e, 0x54, 0x79, 0x70, 0x65, 0x52,
+	0x04, 0x74, 0x79, 0x70, 0x65, 0x12, 0x24, 0x0a, 0x0b, 0x61, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74,
+	0x79, 0x5f, 0x69, 0x64, 0x18, 0x02, 0x20, 0x01, 0x28, 0x05, 0x48, 0x00, 0x52, 0x0a, 0x61, 0x63,
+	0x74, 0x69, 0x76, 0x69, 0x74, 0x79, 0x49, 0x64, 0x88, 0x01, 0x01, 0x22, 0x33, 0x0a, 0x04, 0x54,
+	0x79, 0x70, 0x65, 0x12, 0x14, 0x0a, 0x10, 0x54, 0x59, 0x50, 0x45, 0x5f, 0x55, 0x4e, 0x53, 0x50,
+	0x45, 0x43, 0x49, 0x46, 0x49, 0x45, 0x44, 0x10, 0x00, 0x12, 0x15, 0x0a, 0x11, 0x54, 0x59, 0x50,
+	0x45, 0x5f, 0x4d, 0x45, 0x4d, 0x4f, 0x5f, 0x43, 0x4f, 0x4d, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x01,
+	0x42, 0x0e, 0x0a, 0x0c, 0x5f, 0x61, 0x63, 0x74, 0x69, 0x76, 0x69, 0x74, 0x79, 0x5f, 0x69, 0x64,
+	0x42, 0x95, 0x01, 0x0a, 0x0f, 0x63, 0x6f, 0x6d, 0x2e, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x73,
+	0x74, 0x6f, 0x72, 0x65, 0x42, 0x0a, 0x49, 0x6e, 0x62, 0x6f, 0x78, 0x50, 0x72, 0x6f, 0x74, 0x6f,
+	0x50, 0x01, 0x5a, 0x29, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x75,
+	0x73, 0x65, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2f, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x73, 0x74, 0x6f, 0x72, 0x65, 0xa2, 0x02, 0x03,
+	0x4d, 0x53, 0x58, 0xaa, 0x02, 0x0b, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x53, 0x74, 0x6f, 0x72,
+	0x65, 0xca, 0x02, 0x0b, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x53, 0x74, 0x6f, 0x72, 0x65, 0xe2,
+	0x02, 0x17, 0x4d, 0x65, 0x6d, 0x6f, 0x73, 0x5c, 0x53, 0x74, 0x6f, 0x72, 0x65, 0x5c, 0x47, 0x50,
+	0x42, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0xea, 0x02, 0x0c, 0x4d, 0x65, 0x6d, 0x6f,
+	0x73, 0x3a, 0x3a, 0x53, 0x74, 0x6f, 0x72, 0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -129,16 +161,19 @@ func file_store_inbox_proto_rawDescGZIP() []byte {
 	return file_store_inbox_proto_rawDescData
 }
 
+var file_store_inbox_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
 var file_store_inbox_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
 var file_store_inbox_proto_goTypes = []interface{}{
-	(*InboxMessage)(nil), // 0: memos.store.InboxMessage
+	(InboxMessage_Type)(0), // 0: memos.store.InboxMessage.Type
+	(*InboxMessage)(nil),   // 1: memos.store.InboxMessage
 }
 var file_store_inbox_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	0, // 0: memos.store.InboxMessage.type:type_name -> memos.store.InboxMessage.Type
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
 }
 
 func init() { file_store_inbox_proto_init() }
@@ -166,13 +201,14 @@ func file_store_inbox_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_store_inbox_proto_rawDesc,
-			NumEnums:      0,
+			NumEnums:      1,
 			NumMessages:   1,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
 		GoTypes:           file_store_inbox_proto_goTypes,
 		DependencyIndexes: file_store_inbox_proto_depIdxs,
+		EnumInfos:         file_store_inbox_proto_enumTypes,
 		MessageInfos:      file_store_inbox_proto_msgTypes,
 	}.Build()
 	File_store_inbox_proto = out.File
diff --git a/proto/store/activity.proto b/proto/store/activity.proto
index 5990f042..d6613bd9 100644
--- a/proto/store/activity.proto
+++ b/proto/store/activity.proto
@@ -3,3 +3,12 @@ syntax = "proto3";
 package memos.store;
 
 option go_package = "gen/store";
+
+message ActivityMemoCommentPayload {
+  int32 memo_id = 1;
+  int32 related_memo_id = 2;
+}
+
+message ActivityPayload {
+  ActivityMemoCommentPayload memo_comment = 1;
+}
diff --git a/proto/store/inbox.proto b/proto/store/inbox.proto
index 1955bab9..f4bd4cf0 100644
--- a/proto/store/inbox.proto
+++ b/proto/store/inbox.proto
@@ -5,8 +5,10 @@ package memos.store;
 option go_package = "gen/store";
 
 message InboxMessage {
-  string title = 1;
-  string content = 2;
-  string link = 3;
-  optional int32 activity_id = 4;
+  enum Type {
+    TYPE_UNSPECIFIED = 0;
+    TYPE_MEMO_COMMENT = 1;
+  }
+  Type type = 1;
+  optional int32 activity_id = 2;
 }
diff --git a/server/server.go b/server/server.go
index fbfc5db4..256cb0c1 100644
--- a/server/server.go
+++ b/server/server.go
@@ -2,7 +2,6 @@ package server
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 	"net/http"
 	"strings"
@@ -112,10 +111,6 @@ func NewServer(ctx context.Context, profile *profile.Profile, store *store.Store
 }
 
 func (s *Server) Start(ctx context.Context) error {
-	if err := s.createServerStartActivity(ctx); err != nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-
 	go s.telegramBot.Start(ctx)
 	go s.backupRunner.Run(ctx)
 
@@ -182,26 +177,6 @@ func (s *Server) getSystemSecretSessionName(ctx context.Context) (string, error)
 	return secretSessionNameValue.Value, nil
 }
 
-func (s *Server) createServerStartActivity(ctx context.Context) error {
-	payload := apiv1.ActivityServerStartPayload{
-		ServerID: s.ID,
-		Profile:  s.Profile,
-	}
-	payloadBytes, err := json.Marshal(payload)
-	if err != nil {
-		return errors.Wrap(err, "failed to marshal activity payload")
-	}
-	activity, err := s.Store.CreateActivity(ctx, &store.Activity{
-		Type:    apiv1.ActivityServerStart.String(),
-		Level:   apiv1.ActivityInfo.String(),
-		Payload: string(payloadBytes),
-	})
-	if err != nil || activity == nil {
-		return errors.Wrap(err, "failed to create activity")
-	}
-	return err
-}
-
 func grpcRequestSkipper(c echo.Context) bool {
 	return strings.HasPrefix(c.Request().URL.Path, "/memos.api.v2.")
 }
diff --git a/web/src/grpcweb.ts b/web/src/grpcweb.ts
index 347782fb..154b66e1 100644
--- a/web/src/grpcweb.ts
+++ b/web/src/grpcweb.ts
@@ -1,4 +1,5 @@
 import { createChannel, createClientFactory, FetchTransport } from "nice-grpc-web";
+import { InboxServiceDefinition } from "./types/proto/api/v2/inbox_service";
 import { MemoServiceDefinition } from "./types/proto/api/v2/memo_service";
 import { ResourceServiceDefinition } from "./types/proto/api/v2/resource_service";
 import { SystemServiceDefinition } from "./types/proto/api/v2/system_service";
@@ -23,3 +24,5 @@ export const resourceServiceClient = clientFactory.create(ResourceServiceDefinit
 export const systemServiceClient = clientFactory.create(SystemServiceDefinition, channel);
 
 export const tagServiceClient = clientFactory.create(TagServiceDefinition, channel);
+
+export const inboxServiceClient = clientFactory.create(InboxServiceDefinition, channel);