diff --git a/README.md b/README.md
index 3251abf..b3e32d3 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ The Model Context Protocol (MCP) is a system that lets AI apps, like Claude Desk
 - [x] Get the list of dialogs (chats, channels, groups)
 - [x] Get the list of messages in the given dialog
 - [x] Draft a message
-- [ ] Mark chanel as read
+- [x] Mark dialog as read
 - [ ] Retrieve messages by date and time
 - [ ] Get the list of contacts
 
diff --git a/internal/tg/read.go b/internal/tg/read.go
new file mode 100644
index 0000000..c702bb5
--- /dev/null
+++ b/internal/tg/read.go
@@ -0,0 +1,86 @@
+package tg
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/gotd/td/telegram/message"
+	"github.com/gotd/td/tg"
+	mcp "github.com/metoro-io/mcp-golang"
+	"github.com/pkg/errors"
+)
+
+type ReadArguments struct {
+	Name string `json:"name" jsonschema:"description=Name of the dialog"`
+}
+
+type ReadResponse struct {
+	Result string `json:"result"`
+}
+
+func (c *Client) ReadHistory(args ReadArguments) (*mcp.ToolResponse, error) {
+	ctx := context.Background()
+
+	var affectedMsgs *tg.MessagesAffectedMessages
+	client := c.T()
+	if err := client.Run(ctx, func(ctx context.Context) error {
+		api := client.API()
+
+		sender := message.NewSender(api)
+		inputPeer, err := sender.Resolve(args.Name).AsInputPeer(ctx)
+		if err != nil {
+			return fmt.Errorf("failed to resolve name: %w", err)
+		}
+
+		switch p := inputPeer.(type) {
+		case *tg.InputPeerUser:
+			affectedMsgs, err = api.MessagesReadHistory(ctx, &tg.MessagesReadHistoryRequest{
+				Peer: inputPeer,
+			})
+
+		case *tg.InputPeerChannel:
+			var ok bool
+			ok, err = api.ChannelsReadHistory(ctx, &tg.ChannelsReadHistoryRequest{
+				Channel: &tg.InputChannel{
+					ChannelID:  p.ChannelID,
+					AccessHash: p.AccessHash,
+				},
+			})
+			if err != nil {
+				return fmt.Errorf("failed to read channels: %w", err)
+			}
+
+			affectedMsgs = &tg.MessagesAffectedMessages{}
+			if ok {
+				affectedMsgs = &tg.MessagesAffectedMessages{
+					Pts:      1,
+					PtsCount: 1,
+				}
+			}
+
+		default:
+			return fmt.Errorf("unexpected input peer type: %T", p)
+		}
+
+		if err != nil {
+			return fmt.Errorf("read history: %w", err)
+		}
+
+		return nil
+	}); err != nil {
+		return nil, fmt.Errorf("run client: %w", err)
+	}
+
+	res := "done"
+	if affectedMsgs.PtsCount == 0 {
+		res = "unread messages not found"
+	}
+
+	jsonData, err := json.Marshal(ReadResponse{Result: res})
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to marshal response")
+	}
+
+	return mcp.NewToolResponse(mcp.NewTextContent(string(jsonData))), nil
+}
diff --git a/serve.go b/serve.go
index 526d977..2e4d2ac 100644
--- a/serve.go
+++ b/serve.go
@@ -57,10 +57,17 @@ func serve(ctx context.Context, cmd *cli.Command) error {
 
 		answer, err = client.SendDraft(tg.DraftArguments{Name: os.Getenv("TG_TEST_USERNAME"), Text: "test draft"})
 		if err != nil {
-			return fmt.Errorf("send draft: %w", err)
+			log.Err(err).Msg("Check SendDraft: FAIL")
+		} else {
+			log.Info().RawJSON("answer", []byte(answer.Content[0].TextContent.Text)).Msg("Check SendDraft: OK")
 		}
 
-		log.Info().RawJSON("answer", []byte(answer.Content[0].TextContent.Text)).Msg("Check SendDraft: OK")
+		answer, err = client.ReadHistory(tg.ReadArguments{Name: os.Getenv("TG_TEST_USERNAME")})
+		if err != nil {
+			log.Err(err).Msg("Check ReadHistory: FAIL")
+		} else {
+			log.Info().RawJSON("answer", []byte(answer.Content[0].TextContent.Text)).Msg("Check ReadHistory: OK")
+		}
 
 		return nil
 	}
@@ -85,6 +92,11 @@ func serve(ctx context.Context, cmd *cli.Command) error {
 		return fmt.Errorf("register dialogs tool: %w", err)
 	}
 
+	err = server.RegisterTool("tg_read", "Mark dialog messages as read (channel, user)", client.ReadHistory)
+	if err != nil {
+		return fmt.Errorf("register read tool: %w", err)
+	}
+
 	if err := server.Serve(); err != nil {
 		return fmt.Errorf("serve: %w", err)
 	}