diff --git a/internal/bossraid/handler.go b/internal/bossraid/handler.go
new file mode 100644
index 0000000..34a81e2
--- /dev/null
+++ b/internal/bossraid/handler.go
@@ -0,0 +1,141 @@
+package bossraid
+
+import (
+	"log"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+type Handler struct {
+	svc *Service
+}
+
+func NewHandler(svc *Service) *Handler {
+	return &Handler{svc: svc}
+}
+
+func bossError(c *fiber.Ctx, status int, userMsg string, err error) error {
+	log.Printf("bossraid error: %s: %v", userMsg, err)
+	return c.Status(status).JSON(fiber.Map{"error": userMsg})
+}
+
+// RequestEntry handles POST /api/internal/bossraid/entry
+// Called by MMO server when a party requests boss raid entry.
+func (h *Handler) RequestEntry(c *fiber.Ctx) error {
+	var req struct {
+		Usernames []string `json:"usernames"`
+		BossID    int      `json:"bossId"`
+	}
+	if err := c.BodyParser(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
+	}
+	if len(req.Usernames) == 0 || req.BossID <= 0 {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "usernames와 bossId는 필수입니다"})
+	}
+
+	room, err := h.svc.RequestEntry(req.Usernames, req.BossID)
+	if err != nil {
+		return bossError(c, fiber.StatusConflict, err.Error(), err)
+	}
+
+	return c.Status(fiber.StatusCreated).JSON(fiber.Map{
+		"roomId":      room.ID,
+		"sessionName": room.SessionName,
+		"bossId":      room.BossID,
+		"players":     req.Usernames,
+		"status":      room.Status,
+	})
+}
+
+// StartRaid handles POST /api/internal/bossraid/start
+// Called by dedicated server when the Fusion session begins.
+func (h *Handler) StartRaid(c *fiber.Ctx) error {
+	var req struct {
+		SessionName string `json:"sessionName"`
+	}
+	if err := c.BodyParser(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
+	}
+	if req.SessionName == "" {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "sessionName은 필수입니다"})
+	}
+
+	room, err := h.svc.StartRaid(req.SessionName)
+	if err != nil {
+		return bossError(c, fiber.StatusBadRequest, err.Error(), err)
+	}
+
+	return c.JSON(fiber.Map{
+		"roomId":      room.ID,
+		"sessionName": room.SessionName,
+		"status":      room.Status,
+	})
+}
+
+// CompleteRaid handles POST /api/internal/bossraid/complete
+// Called by dedicated server when the boss is killed. Distributes rewards.
+func (h *Handler) CompleteRaid(c *fiber.Ctx) error {
+	var req struct {
+		SessionName string         `json:"sessionName"`
+		Rewards     []PlayerReward `json:"rewards"`
+	}
+	if err := c.BodyParser(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
+	}
+	if req.SessionName == "" {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "sessionName은 필수입니다"})
+	}
+
+	room, results, err := h.svc.CompleteRaid(req.SessionName, req.Rewards)
+	if err != nil {
+		return bossError(c, fiber.StatusBadRequest, err.Error(), err)
+	}
+
+	return c.JSON(fiber.Map{
+		"roomId":        room.ID,
+		"sessionName":   room.SessionName,
+		"status":        room.Status,
+		"rewardResults": results,
+	})
+}
+
+// FailRaid handles POST /api/internal/bossraid/fail
+// Called by dedicated server on timeout or party wipe.
+func (h *Handler) FailRaid(c *fiber.Ctx) error {
+	var req struct {
+		SessionName string `json:"sessionName"`
+	}
+	if err := c.BodyParser(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
+	}
+	if req.SessionName == "" {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "sessionName은 필수입니다"})
+	}
+
+	room, err := h.svc.FailRaid(req.SessionName)
+	if err != nil {
+		return bossError(c, fiber.StatusBadRequest, err.Error(), err)
+	}
+
+	return c.JSON(fiber.Map{
+		"roomId":      room.ID,
+		"sessionName": room.SessionName,
+		"status":      room.Status,
+	})
+}
+
+// GetRoom handles GET /api/internal/bossraid/room
+// Query param: sessionName
+func (h *Handler) GetRoom(c *fiber.Ctx) error {
+	sessionName := c.Query("sessionName")
+	if sessionName == "" {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "sessionName은 필수입니다"})
+	}
+
+	room, err := h.svc.GetRoom(sessionName)
+	if err != nil {
+		return bossError(c, fiber.StatusNotFound, "방을 찾을 수 없습니다", err)
+	}
+
+	return c.JSON(room)
+}
diff --git a/internal/bossraid/model.go b/internal/bossraid/model.go
new file mode 100644
index 0000000..263ce55
--- /dev/null
+++ b/internal/bossraid/model.go
@@ -0,0 +1,31 @@
+package bossraid
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type RoomStatus string
+
+const (
+	StatusWaiting    RoomStatus = "waiting"
+	StatusInProgress RoomStatus = "in_progress"
+	StatusCompleted  RoomStatus = "completed"
+	StatusFailed     RoomStatus = "failed"
+)
+
+// BossRoom represents a boss raid session room.
+type BossRoom struct {
+	ID          uint           `json:"id"          gorm:"primaryKey"`
+	CreatedAt   time.Time      `json:"createdAt"`
+	UpdatedAt   time.Time      `json:"updatedAt"`
+	DeletedAt   gorm.DeletedAt `json:"-"           gorm:"index"`
+	SessionName string         `json:"sessionName" gorm:"type:varchar(100);uniqueIndex;not null"`
+	BossID      int            `json:"bossId"      gorm:"index;not null"`
+	Status      RoomStatus     `json:"status"      gorm:"type:varchar(20);index;default:waiting;not null"`
+	MaxPlayers  int            `json:"maxPlayers"  gorm:"default:3;not null"`
+	Players     string         `json:"players"     gorm:"type:text"` // JSON array of usernames
+	StartedAt   *time.Time     `json:"startedAt,omitempty"`
+	CompletedAt *time.Time     `json:"completedAt,omitempty"`
+}
diff --git a/internal/bossraid/repository.go b/internal/bossraid/repository.go
new file mode 100644
index 0000000..3b788f7
--- /dev/null
+++ b/internal/bossraid/repository.go
@@ -0,0 +1,39 @@
+package bossraid
+
+import "gorm.io/gorm"
+
+type Repository struct {
+	db *gorm.DB
+}
+
+func NewRepository(db *gorm.DB) *Repository {
+	return &Repository{db: db}
+}
+
+func (r *Repository) Create(room *BossRoom) error {
+	return r.db.Create(room).Error
+}
+
+func (r *Repository) Update(room *BossRoom) error {
+	return r.db.Save(room).Error
+}
+
+func (r *Repository) FindBySessionName(sessionName string) (*BossRoom, error) {
+	var room BossRoom
+	if err := r.db.Where("session_name = ?", sessionName).First(&room).Error; err != nil {
+		return nil, err
+	}
+	return &room, nil
+}
+
+// CountActiveByUsername checks if a player is already in an active boss raid.
+func (r *Repository) CountActiveByUsername(username string) (int64, error) {
+	var count int64
+	search := `"` + username + `"`
+	err := r.db.Model(&BossRoom{}).
+		Where("status IN ? AND players LIKE ?",
+			[]RoomStatus{StatusWaiting, StatusInProgress},
+			"%"+search+"%",
+		).Count(&count).Error
+	return count, err
+}
diff --git a/internal/bossraid/service.go b/internal/bossraid/service.go
new file mode 100644
index 0000000..25a7f94
--- /dev/null
+++ b/internal/bossraid/service.go
@@ -0,0 +1,178 @@
+package bossraid
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/tolelom/tolchain/core"
+)
+
+type Service struct {
+	repo         *Repository
+	rewardGrant  func(username string, tokenAmount uint64, assets []core.MintAssetPayload) error
+}
+
+func NewService(repo *Repository) *Service {
+	return &Service{repo: repo}
+}
+
+// SetRewardGranter sets the callback for granting rewards via blockchain.
+func (s *Service) SetRewardGranter(fn func(username string, tokenAmount uint64, assets []core.MintAssetPayload) error) {
+	s.rewardGrant = fn
+}
+
+// RequestEntry creates a new boss room for a party.
+// Returns the room with assigned session name.
+func (s *Service) RequestEntry(usernames []string, bossID int) (*BossRoom, error) {
+	if len(usernames) == 0 {
+		return nil, fmt.Errorf("플레이어 목록이 비어있습니다")
+	}
+	if len(usernames) > 3 {
+		return nil, fmt.Errorf("최대 3명까지 입장할 수 있습니다")
+	}
+
+	// Check if any player is already in an active room
+	for _, username := range usernames {
+		count, err := s.repo.CountActiveByUsername(username)
+		if err != nil {
+			return nil, fmt.Errorf("플레이어 상태 확인 실패: %w", err)
+		}
+		if count > 0 {
+			return nil, fmt.Errorf("플레이어 %s가 이미 보스 레이드 중입니다", username)
+		}
+	}
+
+	playersJSON, err := json.Marshal(usernames)
+	if err != nil {
+		return nil, fmt.Errorf("플레이어 목록 직렬화 실패: %w", err)
+	}
+
+	sessionName := fmt.Sprintf("BossRaid_%d_%d", bossID, time.Now().UnixNano())
+
+	room := &BossRoom{
+		SessionName: sessionName,
+		BossID:      bossID,
+		Status:      StatusWaiting,
+		MaxPlayers:  3,
+		Players:     string(playersJSON),
+	}
+
+	if err := s.repo.Create(room); err != nil {
+		return nil, fmt.Errorf("방 생성 실패: %w", err)
+	}
+
+	return room, nil
+}
+
+// StartRaid marks a room as in_progress.
+func (s *Service) StartRaid(sessionName string) (*BossRoom, error) {
+	room, err := s.repo.FindBySessionName(sessionName)
+	if err != nil {
+		return nil, fmt.Errorf("방을 찾을 수 없습니다: %w", err)
+	}
+	if room.Status != StatusWaiting {
+		return nil, fmt.Errorf("시작할 수 없는 상태입니다: %s", room.Status)
+	}
+
+	now := time.Now()
+	room.Status = StatusInProgress
+	room.StartedAt = &now
+
+	if err := s.repo.Update(room); err != nil {
+		return nil, fmt.Errorf("상태 업데이트 실패: %w", err)
+	}
+
+	return room, nil
+}
+
+// PlayerReward describes the reward for a single player.
+type PlayerReward struct {
+	Username    string                  `json:"username"`
+	TokenAmount uint64                  `json:"tokenAmount"`
+	Assets      []core.MintAssetPayload `json:"assets"`
+}
+
+// RewardResult holds the result of granting a reward to one player.
+type RewardResult struct {
+	Username string `json:"username"`
+	Success  bool   `json:"success"`
+	Error    string `json:"error,omitempty"`
+}
+
+// CompleteRaid marks a room as completed and grants rewards via blockchain.
+func (s *Service) CompleteRaid(sessionName string, rewards []PlayerReward) (*BossRoom, []RewardResult, error) {
+	room, err := s.repo.FindBySessionName(sessionName)
+	if err != nil {
+		return nil, nil, fmt.Errorf("방을 찾을 수 없습니다: %w", err)
+	}
+	if room.Status != StatusInProgress {
+		return nil, nil, fmt.Errorf("완료할 수 없는 상태입니다: %s", room.Status)
+	}
+
+	// Validate reward recipients are room players
+	var players []string
+	if err := json.Unmarshal([]byte(room.Players), &players); err != nil {
+		return nil, nil, fmt.Errorf("플레이어 목록 파싱 실패: %w", err)
+	}
+	playerSet := make(map[string]bool, len(players))
+	for _, p := range players {
+		playerSet[p] = true
+	}
+	for _, r := range rewards {
+		if !playerSet[r.Username] {
+			return nil, nil, fmt.Errorf("보상 대상 %s가 방의 플레이어가 아닙니다", r.Username)
+		}
+	}
+
+	// Mark room completed
+	now := time.Now()
+	room.Status = StatusCompleted
+	room.CompletedAt = &now
+	if err := s.repo.Update(room); err != nil {
+		return nil, nil, fmt.Errorf("상태 업데이트 실패: %w", err)
+	}
+
+	// Grant rewards
+	results := make([]RewardResult, 0, len(rewards))
+	if s.rewardGrant != nil {
+		for _, r := range rewards {
+			grantErr := s.rewardGrant(r.Username, r.TokenAmount, r.Assets)
+			result := RewardResult{Username: r.Username, Success: grantErr == nil}
+			if grantErr != nil {
+				result.Error = grantErr.Error()
+				log.Printf("보상 지급 실패: %s: %v", r.Username, grantErr)
+			}
+			results = append(results, result)
+		}
+	}
+
+	return room, results, nil
+}
+
+// FailRaid marks a room as failed.
+func (s *Service) FailRaid(sessionName string) (*BossRoom, error) {
+	room, err := s.repo.FindBySessionName(sessionName)
+	if err != nil {
+		return nil, fmt.Errorf("방을 찾을 수 없습니다: %w", err)
+	}
+	if room.Status != StatusWaiting && room.Status != StatusInProgress {
+		return nil, fmt.Errorf("실패 처리할 수 없는 상태입니다: %s", room.Status)
+	}
+
+	now := time.Now()
+	room.Status = StatusFailed
+	room.CompletedAt = &now
+
+	if err := s.repo.Update(room); err != nil {
+		return nil, fmt.Errorf("상태 업데이트 실패: %w", err)
+	}
+
+	return room, nil
+}
+
+// GetRoom returns a room by session name.
+func (s *Service) GetRoom(sessionName string) (*BossRoom, error) {
+	return s.repo.FindBySessionName(sessionName)
+}
diff --git a/main.go b/main.go
index b058436..1522365 100644
--- a/main.go
+++ b/main.go
@@ -5,8 +5,11 @@ import (
 
 	"a301_server/internal/announcement"
 	"a301_server/internal/auth"
+	"a301_server/internal/bossraid"
 	"a301_server/internal/chain"
 	"a301_server/internal/download"
+
+	"github.com/tolelom/tolchain/core"
 	"a301_server/pkg/config"
 	"a301_server/pkg/database"
 	"a301_server/routes"
@@ -27,7 +30,7 @@ func main() {
 	log.Println("MySQL 연결 성공")
 
 	// AutoMigrate
-	database.DB.AutoMigrate(&auth.User{}, &announcement.Announcement{}, &download.Info{}, &chain.UserWallet{})
+	database.DB.AutoMigrate(&auth.User{}, &announcement.Announcement{}, &download.Info{}, &chain.UserWallet{}, &bossraid.BossRoom{})
 
 	if err := database.ConnectRedis(); err != nil {
 		log.Fatalf("Redis 연결 실패: %v", err)
@@ -70,6 +73,15 @@ func main() {
 		return err
 	})
 
+	// Boss Raid
+	brRepo := bossraid.NewRepository(database.DB)
+	brSvc := bossraid.NewService(brRepo)
+	brSvc.SetRewardGranter(func(username string, tokenAmount uint64, assets []core.MintAssetPayload) error {
+		_, err := chainSvc.GrantRewardByUsername(username, tokenAmount, assets)
+		return err
+	})
+	brHandler := bossraid.NewHandler(brSvc)
+
 	if config.C.InternalAPIKey == "" {
 		log.Println("WARN: INTERNAL_API_KEY not set — /api/internal/* endpoints are disabled")
 	}
@@ -117,7 +129,7 @@ func main() {
 		},
 	})
 
-	routes.Register(app, authHandler, annHandler, dlHandler, chainHandler, authLimiter, apiLimiter)
+	routes.Register(app, authHandler, annHandler, dlHandler, chainHandler, brHandler, authLimiter, apiLimiter)
 
 	log.Fatal(app.Listen(":" + config.C.AppPort))
 }
diff --git a/routes/routes.go b/routes/routes.go
index e153c4b..77c9be2 100644
--- a/routes/routes.go
+++ b/routes/routes.go
@@ -3,6 +3,7 @@ package routes
 import (
 	"a301_server/internal/announcement"
 	"a301_server/internal/auth"
+	"a301_server/internal/bossraid"
 	"a301_server/internal/chain"
 	"a301_server/internal/download"
 	"a301_server/pkg/middleware"
@@ -15,6 +16,7 @@ func Register(
 	annH *announcement.Handler,
 	dlH *download.Handler,
 	chainH *chain.Handler,
+	brH *bossraid.Handler,
 	authLimiter fiber.Handler,
 	apiLimiter fiber.Handler,
 ) {
@@ -76,6 +78,14 @@ func Register(
 	chainAdmin.Post("/reward", middleware.Idempotency, chainH.GrantReward)
 	chainAdmin.Post("/template", middleware.Idempotency, chainH.RegisterTemplate)
 
+	// Internal - Boss Raid (API key auth)
+	br := api.Group("/internal/bossraid", middleware.ServerAuth)
+	br.Post("/entry", brH.RequestEntry)
+	br.Post("/start", brH.StartRaid)
+	br.Post("/complete", middleware.Idempotency, brH.CompleteRaid)
+	br.Post("/fail", brH.FailRaid)
+	br.Get("/room", brH.GetRoom)
+
 	// Internal - Game server endpoints (API key auth, username-based, idempotency-protected)
 	internal := api.Group("/internal/chain", middleware.ServerAuth)
 	internal.Post("/reward", middleware.Idempotency, chainH.InternalGrantReward)