diff --git a/api/account.go b/api/account.go
index f820543..b48b50a 100644
--- a/api/account.go
+++ b/api/account.go
@@ -107,9 +107,182 @@ func (a *Account) JoinServer(serverId string) (err error) {
 	return
 }
 
+type NameChangResp struct {
+	ChangedAt         string `json:"changedAt"`
+	CreatedAt         string `json:"createdAt"`
+	NameChangeAllowed bool   `json:"nameChangeAllowed"`
+}
+
+func (a *Account) NameChangeInfo() (r NameChangResp, err error) {
+	err = a.doMcApiRequest("GET", "https://api.minecraftservices.com/minecraft/profile/namechange", nil, &r)
+	return
+}
+
 func NewOfflineAccount(name string) *Account {
 	return &Account{
 		Name: name,
 		Uuid: crypto.FromOfflinePlayer(name),
 	}
 }
+
+// PlayerProfile represents the player's profile information
+type PlayerProfile struct {
+	ID    string `json:"id"`
+	Name  string `json:"name"`
+	Skins []struct {
+		ID      string `json:"id"`
+		State   string `json:"state"`
+		URL     string `json:"url"`
+		Variant string `json:"variant"`
+	} `json:"skins"`
+	Capes []struct {
+		ID    string `json:"id"`
+		State string `json:"state"`
+		URL   string `json:"url"`
+		Alias string `json:"alias"`
+	} `json:"capes"`
+}
+
+// QueryProfile queries the player's profile
+func (a *Account) QueryProfile() (profile PlayerProfile, err error) {
+	err = a.doMcApiRequest("GET", BaseUrlApi+"/minecraft/profile", nil, &profile)
+	return
+}
+
+// PlayerAttributes represents the player's attributes
+type PlayerAttributes struct {
+	Privileges struct {
+		OnlineChat struct {
+			Enabled bool `json:"enabled"`
+		} `json:"onlineChat"`
+		MultiplayerServer struct {
+			Enabled bool `json:"enabled"`
+		} `json:"multiplayerServer"`
+		MultiplayerRealms struct {
+			Enabled bool `json:"enabled"`
+		} `json:"multiplayerRealms"`
+		Telemetry struct {
+			Enabled bool `json:"enabled"`
+		} `json:"telemetry"`
+		OptionalTelemetry struct {
+			Enabled bool `json:"enabled"`
+		} `json:"optionalTelemetry"`
+	} `json:"privileges"`
+	ProfanityFilterPreferences struct {
+		ProfanityFilterOn bool `json:"profanityFilterOn"`
+	} `json:"profanityFilterPreferences"`
+	BanStatus struct {
+		BannedScopes map[string]struct {
+			BanID         string `json:"banId"`
+			Expires       string `json:"expires,omitempty"`
+			Reason        string `json:"reason"`
+			ReasonMessage string `json:"reasonMessage"`
+		} `json:"bannedScopes"`
+	} `json:"banStatus"`
+}
+
+// QueryAttributes queries the player's attributes
+func (a *Account) QueryAttributes() (attrs PlayerAttributes, err error) {
+	err = a.doMcApiRequest("GET", BaseUrlApi+"/player/attributes", nil, &attrs)
+	return
+}
+
+// ModifyAttributesRequest represents the request to modify player attributes
+type ModifyAttributesRequest struct {
+	ProfanityFilterPreferences struct {
+		ProfanityFilterOn bool `json:"profanityFilterOn"`
+	} `json:"profanityFilterPreferences"`
+}
+
+// ModifyAttributes modifies the player's attributes
+func (a *Account) ModifyAttributes(req ModifyAttributesRequest) (attrs PlayerAttributes, err error) {
+	err = a.doMcApiRequest("POST", BaseUrlApi+"/player/attributes", req, &attrs)
+	return
+}
+
+// BlockedUsers represents the list of blocked users
+type BlockedUsers struct {
+	BlockedProfiles []string `json:"blockedProfiles"`
+}
+
+// GetBlocklist gets the list of blocked users
+func (a *Account) GetBlocklist() (blocklist BlockedUsers, err error) {
+	err = a.doMcApiRequest("GET", BaseUrlApi+"/privacy/blocklist", nil, &blocklist)
+	return
+}
+
+// CheckNameAvailability checks if a name is available
+type NameAvailability struct {
+	Status string `json:"status"` // DUPLICATE, AVAILABLE, NOT_ALLOWED
+}
+
+// CheckNameAvailability checks if a name is available
+func (a *Account) CheckNameAvailability(name string) (avail NameAvailability, err error) {
+	err = a.doMcApiRequest("GET", BaseUrlApi+"/minecraft/profile/name/"+name+"/available", nil, &avail)
+	return
+}
+
+// ChangeName changes the player's name
+func (a *Account) ChangeName(newName string) (profile PlayerProfile, err error) {
+	err = a.doMcApiRequest("PUT", BaseUrlApi+"/minecraft/profile/name/"+newName, nil, &profile)
+	return
+}
+
+// ChangeSkinRequest represents the request to change skin
+type ChangeSkinRequest struct {
+	Variant string `json:"variant"` // "classic" or "slim"
+	URL     string `json:"url"`
+}
+
+// ChangeSkin changes the player's skin
+func (a *Account) ChangeSkin(req ChangeSkinRequest) (profile PlayerProfile, err error) {
+	err = a.doMcApiRequest("POST", BaseUrlApi+"/minecraft/profile/skins", req, &profile)
+	return
+}
+
+// ResetSkin resets the player's skin to default
+func (a *Account) ResetSkin() (profile PlayerProfile, err error) {
+	err = a.doMcApiRequest("DELETE", BaseUrlApi+"/minecraft/profile/skins/active", nil, &profile)
+	return
+}
+
+// HideCape hides the player's active cape
+func (a *Account) HideCape() (profile PlayerProfile, err error) {
+	err = a.doMcApiRequest("DELETE", BaseUrlApi+"/minecraft/profile/capes/active", nil, &profile)
+	return
+}
+
+// ShowCapeRequest represents the request to show a cape
+type ShowCapeRequest struct {
+	CapeID string `json:"capeId"`
+}
+
+// ShowCape shows a specific cape
+func (a *Account) ShowCape(capeID string) (profile PlayerProfile, err error) {
+	req := ShowCapeRequest{CapeID: capeID}
+	err = a.doMcApiRequest("PUT", BaseUrlApi+"/minecraft/profile/capes/active", req, &profile)
+	return
+}
+
+// CheckGiftCodeValidity checks if a gift code is valid
+func (a *Account) CheckGiftCodeValidity(giftCode string) (valid bool, err error) {
+	url := BaseUrlApi + "/productvoucher/giftcode"
+	r, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return false, err
+	}
+
+	r.Header.Set("Authorization", "Bearer "+a.Ygg)
+
+	resp, err := http.DefaultClient.Do(r)
+	if err != nil {
+		return false, err
+	}
+	defer resp.Body.Close()
+
+	// Returns HTTP 200 or 204 if valid, 404 if invalid
+	if resp.StatusCode == 200 || resp.StatusCode == 204 {
+		return true, nil
+	}
+	return false, nil
+}
diff --git a/proto/connection_test.go b/proto/connection_test.go
index d626d2d..78194c5 100644
--- a/proto/connection_test.go
+++ b/proto/connection_test.go
@@ -6,6 +6,7 @@ import (
 	"testing"
 
 	"github.com/admin-else/strom/proto"
+	"github.com/admin-else/strom/proto_base"
 	"github.com/admin-else/strom/server"
 	"github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
@@ -19,11 +20,13 @@ var nanIgnorer64 = cmp.Comparer(func(x, y float64) bool {
 	return (math.IsNaN(x) && math.IsNaN(y)) || x == y
 })
 
-func FuzzConn(f *testing.F) {
-	f.Fuzz(func(t *testing.T, inbytes []byte) {
+func NewStateFuzzer(state proto_base.State, actor proto_base.Actor) func(t *testing.T, inbytes []byte) {
+	return func(t *testing.T, inbytes []byte) {
 		b1 := bytes.NewBuffer(inbytes)
 		b2 := bytes.NewBuffer(nil)
 		conn := server.Servee(nil)
+		conn.State = state
+		conn.Actor = actor
 		conn.R = b1
 		conn.W = b2
 		_ = conn.SetVersion("1.21.8") // cant fail
@@ -55,5 +58,45 @@ func FuzzConn(f *testing.F) {
 			)
 		}
 		return
-	})
+	}
+}
+
+func FuzzConnHandshakingToServer(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Handshaking, proto_base.Server))
+}
+
+func FuzzConnHandshakingToClient(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Handshaking, proto_base.Client))
+}
+
+func FuzzConnStatusToServer(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Status, proto_base.Server))
+}
+
+func FuzzConnStatusToClient(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Status, proto_base.Client))
+}
+
+func FuzzConnLoginToServer(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Login, proto_base.Server))
+}
+
+func FuzzConnLoginToClient(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Login, proto_base.Client))
+}
+
+func FuzzConnConfigToServer(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Configuration, proto_base.Server))
+}
+
+func FuzzConnConfigToClient(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Configuration, proto_base.Client))
+}
+
+func FuzzConnPlayToServer(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Play, proto_base.Server))
+}
+
+func FuzzConnPlayToClient(f *testing.F) {
+	f.Fuzz(NewStateFuzzer(proto_base.Play, proto_base.Client))
 }