diff --git a/go.mod b/go.mod
index ebe2894..0f5108e 100644
--- a/go.mod
+++ b/go.mod
@@ -70,6 +70,7 @@ require (
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.51.0 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect
+	go.etcd.io/bbolt v1.3.9 // indirect
 	go.opencensus.io v0.24.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/exp v0.0.0-20231219180239-dc181d75b848 // indirect
diff --git a/go.sum b/go.sum
index ff7dace..12d14c9 100644
--- a/go.sum
+++ b/go.sum
@@ -198,6 +198,8 @@ github.com/valyala/fasthttp v1.51.0/go.mod h1:oI2XroL+lI7vdXyYoQk03bXBThfFl2cVdI
 github.com/valyala/tcplisten v1.0.0 h1:rBHj/Xf+E1tRGZyWIWwJDiRY0zc1Js+CV5DqwacVSA8=
 github.com/valyala/tcplisten v1.0.0/go.mod h1:T0xQ8SeCZGxckz9qRXTfG43PvQ/mcWh7FwZEA7Ioqkc=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+go.etcd.io/bbolt v1.3.9 h1:8x7aARPEXiXbHmtUwAIv7eV2fQFHrLLavdiJ3uzJXoI=
+go.etcd.io/bbolt v1.3.9/go.mod h1:zaO32+Ti0PK1ivdPtgMESzuzL2VPoIG1PCQNvOdo/dE=
 go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
 go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
diff --git a/pkg/cmd/main.go b/pkg/cmd/main.go
index 9135e27..d317fa7 100644
--- a/pkg/cmd/main.go
+++ b/pkg/cmd/main.go
@@ -36,11 +36,14 @@ func main() {
 	}
 
 	// Connect to database
-	if err := database.NewSource(); err != nil {
+	if err := database.NewGorm(); err != nil {
 		log.Fatal().Err(err).Msg("An error occurred when connect to database.")
 	} else if err := database.RunMigration(database.C); err != nil {
 		log.Fatal().Err(err).Msg("An error occurred when running database auto migration.")
 	}
+	if err := database.NewBolt(); err != nil {
+		log.Fatal().Err(err).Msg("An error occurred when init bolt db.")
+	}
 
 	// External
 	// All the things are optional so when error occurred the server won't crash
@@ -83,4 +86,6 @@ func main() {
 	log.Info().Msgf("Identity v%s is quitting...", identity.AppVersion)
 
 	quartz.Stop()
+
+	database.B.Close()
 }
diff --git a/pkg/database/source.go b/pkg/database/source.go
index 5fdb79d..db76666 100644
--- a/pkg/database/source.go
+++ b/pkg/database/source.go
@@ -4,6 +4,7 @@ import (
 	"github.com/rs/zerolog/log"
 	"github.com/samber/lo"
 	"github.com/spf13/viper"
+	"go.etcd.io/bbolt"
 	"gorm.io/driver/postgres"
 	"gorm.io/gorm"
 	"gorm.io/gorm/logger"
@@ -12,7 +13,7 @@ import (
 
 var C *gorm.DB
 
-func NewSource() error {
+func NewGorm() error {
 	var err error
 
 	dialector := postgres.Open(viper.GetString("database.dsn"))
@@ -21,8 +22,19 @@ func NewSource() error {
 	}, Logger: logger.New(&log.Logger, logger.Config{
 		Colorful:                  true,
 		IgnoreRecordNotFoundError: true,
-		LogLevel:                  lo.Ternary(viper.GetBool("debug"), logger.Info, logger.Silent),
+		LogLevel:                  lo.Ternary(viper.GetBool("debug.database"), logger.Info, logger.Silent),
 	})})
 
 	return err
 }
+
+var B *bbolt.DB
+
+func NewBolt() error {
+	var err error
+
+	dsn := viper.GetString("database.bolt")
+	B, err = bbolt.Open(dsn, 0600, nil)
+
+	return err
+}
diff --git a/pkg/grpc/auth.go b/pkg/grpc/auth.go
new file mode 100644
index 0000000..a7f3a2c
--- /dev/null
+++ b/pkg/grpc/auth.go
@@ -0,0 +1,34 @@
+package grpc
+
+import (
+	"context"
+	"fmt"
+
+	"git.solsynth.dev/hydrogen/identity/pkg/grpc/proto"
+	"git.solsynth.dev/hydrogen/identity/pkg/services"
+	"github.com/spf13/viper"
+)
+
+func (v *Server) Authenticate(_ context.Context, in *proto.AuthRequest) (*proto.AuthReply, error) {
+	user, atk, rtk, err := services.Authenticate(in.GetAccessToken(), in.GetRefreshToken(), 0)
+	if err != nil {
+		return &proto.AuthReply{
+			IsValid: false,
+		}, nil
+	} else {
+		return &proto.AuthReply{
+			IsValid:      true,
+			AccessToken:  &atk,
+			RefreshToken: &rtk,
+			Userinfo: &proto.Userinfo{
+				Id:          uint64(user.ID),
+				Name:        user.Name,
+				Nick:        user.Nick,
+				Email:       user.GetPrimaryEmail().Content,
+				Avatar:      fmt.Sprintf("https://%s/api/avatar/%s", viper.GetString("domain"), user.Avatar),
+				Banner:      fmt.Sprintf("https://%s/api/avatar/%s", viper.GetString("domain"), user.Banner),
+				Description: &user.Description,
+			},
+		}, nil
+	}
+}
diff --git a/pkg/grpc/notify.go b/pkg/grpc/notify.go
new file mode 100644
index 0000000..3e449bb
--- /dev/null
+++ b/pkg/grpc/notify.go
@@ -0,0 +1,35 @@
+package grpc
+
+import (
+	"context"
+
+	"git.solsynth.dev/hydrogen/identity/pkg/grpc/proto"
+	"git.solsynth.dev/hydrogen/identity/pkg/models"
+	"git.solsynth.dev/hydrogen/identity/pkg/services"
+	"github.com/samber/lo"
+)
+
+func (v *Server) NotifyUser(_ context.Context, in *proto.NotifyRequest) (*proto.NotifyReply, error) {
+	client, err := services.GetThirdClientWithSecret(in.GetClientId(), in.GetClientSecret())
+	if err != nil {
+		return nil, err
+	}
+
+	var user models.Account
+	if user, err = services.GetAccount(uint(in.GetRecipientId())); err != nil {
+		return nil, err
+	}
+
+	links := lo.Map(in.GetLinks(), func(item *proto.NotifyLink, index int) models.NotificationLink {
+		return models.NotificationLink{
+			Label: item.Label,
+			Url:   item.Url,
+		}
+	})
+
+	if err := services.NewNotification(client, user, in.Subject, in.Content, links, in.IsImportant); err != nil {
+		return nil, err
+	}
+
+	return &proto.NotifyReply{IsSent: true}, nil
+}
diff --git a/pkg/grpc/server.go b/pkg/grpc/server.go
index 8b77cc5..4b244a3 100644
--- a/pkg/grpc/server.go
+++ b/pkg/grpc/server.go
@@ -1,14 +1,9 @@
 package grpc
 
 import (
-	"context"
-	"fmt"
 	"net"
 
 	"git.solsynth.dev/hydrogen/identity/pkg/grpc/proto"
-	"git.solsynth.dev/hydrogen/identity/pkg/models"
-	"git.solsynth.dev/hydrogen/identity/pkg/services"
-	"github.com/samber/lo"
 	"github.com/spf13/viper"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/reflection"
@@ -19,55 +14,6 @@ type Server struct {
 	proto.UnimplementedNotifyServer
 }
 
-func (v *Server) Authenticate(_ context.Context, in *proto.AuthRequest) (*proto.AuthReply, error) {
-	user, atk, rtk, err := services.Authenticate(in.GetAccessToken(), in.GetRefreshToken(), 0)
-	if err != nil {
-		return &proto.AuthReply{
-			IsValid: false,
-		}, nil
-	} else {
-		return &proto.AuthReply{
-			IsValid:      true,
-			AccessToken:  &atk,
-			RefreshToken: &rtk,
-			Userinfo: &proto.Userinfo{
-				Id:          uint64(user.ID),
-				Name:        user.Name,
-				Nick:        user.Nick,
-				Email:       user.GetPrimaryEmail().Content,
-				Avatar:      fmt.Sprintf("https://%s/api/avatar/%s", viper.GetString("domain"), user.Avatar),
-				Banner:      fmt.Sprintf("https://%s/api/avatar/%s", viper.GetString("domain"), user.Banner),
-				Description: &user.Description,
-			},
-		}, nil
-	}
-}
-
-func (v *Server) NotifyUser(_ context.Context, in *proto.NotifyRequest) (*proto.NotifyReply, error) {
-	client, err := services.GetThirdClientWithSecret(in.GetClientId(), in.GetClientSecret())
-	if err != nil {
-		return nil, err
-	}
-
-	var user models.Account
-	if user, err = services.GetAccount(uint(in.GetRecipientId())); err != nil {
-		return nil, err
-	}
-
-	links := lo.Map(in.GetLinks(), func(item *proto.NotifyLink, index int) models.NotificationLink {
-		return models.NotificationLink{
-			Label: item.Label,
-			Url:   item.Url,
-		}
-	})
-
-	if err := services.NewNotification(client, user, in.Subject, in.Content, links, in.IsImportant); err != nil {
-		return nil, err
-	}
-
-	return &proto.NotifyReply{IsSent: true}, nil
-}
-
 func StartGrpc() error {
 	listen, err := net.Listen("tcp", viper.GetString("grpc_bind"))
 	if err != nil {
diff --git a/pkg/models/auth.go b/pkg/models/auth.go
index 76f51c9..e74d5a3 100644
--- a/pkg/models/auth.go
+++ b/pkg/models/auth.go
@@ -81,3 +81,9 @@ func (v AuthChallenge) IsAvailable() error {
 
 	return nil
 }
+
+type AuthContext struct {
+	Session   AuthSession `json:"session"`
+	Account   Account     `json:"account"`
+	ExpiredAt time.Time   `json:"expired_at"`
+}
diff --git a/pkg/server/startup.go b/pkg/server/startup.go
index 64725eb..e085eaa 100644
--- a/pkg/server/startup.go
+++ b/pkg/server/startup.go
@@ -28,7 +28,7 @@ func NewServer() {
 		ProxyHeader:           fiber.HeaderXForwardedFor,
 		JSONEncoder:           jsoniter.ConfigCompatibleWithStandardLibrary.Marshal,
 		JSONDecoder:           jsoniter.ConfigCompatibleWithStandardLibrary.Unmarshal,
-		EnablePrintRoutes:     viper.GetBool("debug"),
+		EnablePrintRoutes:     viper.GetBool("debug.print_routes"),
 	})
 
 	A.Use(idempotency.New())
diff --git a/pkg/services/auth.go b/pkg/services/auth.go
index 57eaec7..bb270fb 100644
--- a/pkg/services/auth.go
+++ b/pkg/services/auth.go
@@ -2,12 +2,19 @@ package services
 
 import (
 	"fmt"
+	"time"
 
+	"git.solsynth.dev/hydrogen/identity/pkg/database"
 	"git.solsynth.dev/hydrogen/identity/pkg/models"
 	"git.solsynth.dev/hydrogen/identity/pkg/security"
 	"github.com/gofiber/fiber/v2"
+	jsoniter "github.com/json-iterator/go"
+	"github.com/rs/zerolog/log"
+	"go.etcd.io/bbolt"
 )
 
+const authContextBucket = "AuthContext"
+
 func Authenticate(access, refresh string, depth int) (models.Account, string, string, error) {
 	var user models.Account
 	claims, err := security.DecodeJwt(access)
@@ -22,17 +29,99 @@ func Authenticate(access, refresh string, depth int) (models.Account, string, st
 		return user, access, refresh, fiber.NewError(fiber.StatusUnauthorized, fmt.Sprintf("invalid auth key: %v", err))
 	}
 
-	session, err := LookupSessionWithToken(claims.ID)
-	if err != nil {
-		return user, access, refresh, fiber.NewError(fiber.StatusUnauthorized, fmt.Sprintf("invalid auth session: %v", err))
-	} else if err := session.IsAvailable(); err != nil {
-		return user, access, refresh, fiber.NewError(fiber.StatusUnauthorized, fmt.Sprintf("unavailable auth session: %v", err))
+	var ctx models.AuthContext
+
+	ctx, lookupErr := GetAuthContext(claims.ID)
+	if lookupErr == nil {
+		log.Debug().Str("jti", claims.ID).Msg("Hit auth context cache once!")
+		return ctx.Account, access, refresh, nil
 	}
 
-	user, err = GetAccount(session.AccountID)
-	if err != nil {
-		return user, access, refresh, fiber.NewError(fiber.StatusUnauthorized, fmt.Sprintf("invalid account: %v", err))
+	ctx, err = GrantAuthContext(claims.ID)
+	if err == nil {
+		log.Debug().Str("jti", claims.ID).Err(lookupErr).Msg("Missed auth context cache once!")
+		return user, access, refresh, nil
 	}
 
-	return user, access, refresh, nil
+	return user, access, refresh, fiber.NewError(fiber.StatusUnauthorized, err.Error())
+}
+
+func GetAuthContext(jti string) (models.AuthContext, error) {
+	var err error
+	var ctx models.AuthContext
+
+	err = database.B.View(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket([]byte(authContextBucket))
+		if bucket == nil {
+			return fmt.Errorf("unable to find auth context bucket")
+		}
+
+		raw := bucket.Get([]byte(jti))
+		if raw == nil {
+			return fmt.Errorf("unable to find auth context")
+		} else if err := jsoniter.Unmarshal(raw, &ctx); err != nil {
+			return fmt.Errorf("unable to unmarshal auth context: %v", err)
+		}
+
+		return nil
+	})
+
+	if err == nil && time.Now().Unix() >= ctx.ExpiredAt.Unix() {
+		RevokeAuthContext(jti)
+
+		return ctx, fmt.Errorf("auth context has been expired")
+	}
+
+	return ctx, err
+}
+
+func GrantAuthContext(jti string) (models.AuthContext, error) {
+	var ctx models.AuthContext
+
+	// Query data from primary database
+	session, err := LookupSessionWithToken(jti)
+	if err != nil {
+		return ctx, fmt.Errorf("invalid auth session: %v", err)
+	} else if err := session.IsAvailable(); err != nil {
+		return ctx, fmt.Errorf("unavailable auth session: %v", err)
+	}
+
+	user, err := GetAccount(session.AccountID)
+	if err != nil {
+		return ctx, fmt.Errorf("invalid account: %v", err)
+	}
+
+	// Every context should expires in some while
+	// Once user update their account info, this will have delay to update
+	ctx = models.AuthContext{
+		Session:   session,
+		Account:   user,
+		ExpiredAt: time.Now().Add(5 * time.Minute),
+	}
+
+	// Save data into KV cache
+	return ctx, database.B.Update(func(tx *bbolt.Tx) error {
+		bucket, err := tx.CreateBucketIfNotExists([]byte(authContextBucket))
+		if err != nil {
+			return err
+		}
+
+		raw, err := jsoniter.Marshal(ctx)
+		if err != nil {
+			return err
+		}
+
+		return bucket.Put([]byte(jti), raw)
+	})
+}
+
+func RevokeAuthContext(jti string) error {
+	return database.B.Update(func(tx *bbolt.Tx) error {
+		bucket, err := tx.CreateBucketIfNotExists([]byte(authContextBucket))
+		if err != nil {
+			return err
+		}
+
+		return bucket.Delete([]byte(jti))
+	})
 }
diff --git a/settings.toml b/settings.toml
index 909124d..fa9c9ed 100644
--- a/settings.toml
+++ b/settings.toml
@@ -1,5 +1,3 @@
-debug = true
-
 name = "Goatpass"
 maintainer = "SmartSheep Studio"
 
@@ -12,6 +10,10 @@ content = "uploads"
 
 use_registration_magic_token = false
 
+[debug]
+database = false
+print_routes = false
+
 [external.firebase]
 credentials = "dist/firebase-certs.json"
 
@@ -32,3 +34,4 @@ refresh_token_duration = 2592000
 [database]
 dsn = "host=localhost dbname=hy_identity port=5432 sslmode=disable"
 prefix = "identity_"
+bolt = "uploads/bolt.db"