diff --git a/pkg/query-service/app/apdex.go b/pkg/query-service/app/apdex.go
new file mode 100644
index 0000000000..6854a91367
--- /dev/null
+++ b/pkg/query-service/app/apdex.go
@@ -0,0 +1,46 @@
+package app
+
+import (
+	"context"
+	"net/http"
+	"strings"
+
+	"go.signoz.io/signoz/pkg/query-service/dao"
+	"go.signoz.io/signoz/pkg/query-service/model"
+)
+
+func (aH *APIHandler) setApdexSettings(w http.ResponseWriter, r *http.Request) {
+	req, err := parseSetApdexScoreRequest(r)
+	if aH.HandleError(w, err, http.StatusBadRequest) {
+		return
+	}
+
+	if err := dao.DB().SetApdexSettings(context.Background(), req); err != nil {
+		RespondError(w, &model.ApiError{Err: err, Typ: model.ErrorInternal}, nil)
+		return
+	}
+
+	aH.WriteJSON(w, r, map[string]string{"data": "apdex score updated successfully"})
+}
+
+func (aH *APIHandler) getApdexSettings(w http.ResponseWriter, r *http.Request) {
+	services := r.URL.Query().Get("services")
+	apdexSet, err := dao.DB().GetApdexSettings(context.Background(), strings.Split(strings.TrimSpace(services), ","))
+	if err != nil {
+		RespondError(w, &model.ApiError{Err: err, Typ: model.ErrorInternal}, nil)
+		return
+	}
+
+	aH.WriteJSON(w, r, apdexSet)
+}
+
+func (aH *APIHandler) getLatencyMetricMetadata(w http.ResponseWriter, r *http.Request) {
+	metricName := r.URL.Query().Get("metricName")
+	metricMetadata, err := aH.reader.GetLatencyMetricMetadata(r.Context(), metricName, aH.preferDelta)
+	if err != nil {
+		RespondError(w, &model.ApiError{Err: err, Typ: model.ErrorInternal}, nil)
+		return
+	}
+
+	aH.WriteJSON(w, r, metricMetadata)
+}
diff --git a/pkg/query-service/app/clickhouseReader/reader.go b/pkg/query-service/app/clickhouseReader/reader.go
index ac763be193..5d4faae2e6 100644
--- a/pkg/query-service/app/clickhouseReader/reader.go
+++ b/pkg/query-service/app/clickhouseReader/reader.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"database/sql"
 	"encoding/json"
+	"math"
 
 	"fmt"
 	"io/ioutil"
@@ -3829,6 +3830,52 @@ func (r *ClickHouseReader) GetMetricAttributeValues(ctx context.Context, req *v3
 	return &attributeValues, nil
 }
 
+func (r *ClickHouseReader) GetLatencyMetricMetadata(ctx context.Context, metricName string, preferDelta bool) (*v3.LatencyMetricMetadataResponse, error) {
+	query := fmt.Sprintf("SELECT DISTINCT(temporality) from %s.%s WHERE metric_name='%s'", signozMetricDBName, signozTSTableName, metricName)
+	rows, err := r.db.Query(ctx, query, metricName)
+	if err != nil {
+		zap.S().Error(err)
+		return nil, fmt.Errorf("error while executing query: %s", err.Error())
+	}
+	defer rows.Close()
+
+	var deltaExists bool
+	for rows.Next() {
+		var temporality string
+		if err := rows.Scan(&temporality); err != nil {
+			return nil, fmt.Errorf("error while scanning rows: %s", err.Error())
+		}
+		if temporality == string(v3.Delta) {
+			deltaExists = true
+		}
+	}
+
+	query = fmt.Sprintf("SELECT DISTINCT(toFloat64(JSONExtractString(labels, 'le'))) as le from %s.%s WHERE metric_name='%s' ORDER BY le", signozMetricDBName, signozTSTableName, metricName)
+	rows, err = r.db.Query(ctx, query, metricName)
+	if err != nil {
+		zap.S().Error(err)
+		return nil, fmt.Errorf("error while executing query: %s", err.Error())
+	}
+	defer rows.Close()
+
+	var leFloat64 []float64
+	for rows.Next() {
+		var le float64
+		if err := rows.Scan(&le); err != nil {
+			return nil, fmt.Errorf("error while scanning rows: %s", err.Error())
+		}
+		if math.IsInf(le, 0) {
+			continue
+		}
+		leFloat64 = append(leFloat64, le)
+	}
+
+	return &v3.LatencyMetricMetadataResponse{
+		Delta: deltaExists && preferDelta,
+		Le:    leFloat64,
+	}, nil
+}
+
 func isColumn(tableStatement, field string) bool {
 	return strings.Contains(tableStatement, fmt.Sprintf("`%s` ", field))
 }
diff --git a/pkg/query-service/app/http_handler.go b/pkg/query-service/app/http_handler.go
index e53e9af91a..5008d6edae 100644
--- a/pkg/query-service/app/http_handler.go
+++ b/pkg/query-service/app/http_handler.go
@@ -332,6 +332,10 @@ func (aH *APIHandler) RegisterRoutes(router *mux.Router, am *AuthMiddleware) {
 	router.HandleFunc("/api/v1/dependency_graph", am.ViewAccess(aH.dependencyGraph)).Methods(http.MethodPost)
 	router.HandleFunc("/api/v1/settings/ttl", am.AdminAccess(aH.setTTL)).Methods(http.MethodPost)
 	router.HandleFunc("/api/v1/settings/ttl", am.ViewAccess(aH.getTTL)).Methods(http.MethodGet)
+	router.HandleFunc("/api/v1/settings/apdex", am.AdminAccess(aH.setApdexSettings)).Methods(http.MethodPost)
+	router.HandleFunc("/api/v1/settings/apdex", am.ViewAccess(aH.getApdexSettings)).Methods(http.MethodGet)
+
+	router.HandleFunc("/api/v1/metric_meta", am.ViewAccess(aH.getLatencyMetricMetadata)).Methods(http.MethodGet)
 
 	router.HandleFunc("/api/v1/version", am.OpenAccess(aH.getVersion)).Methods(http.MethodGet)
 	router.HandleFunc("/api/v1/featureFlags", am.OpenAccess(aH.getFeatureFlags)).Methods(http.MethodGet)
diff --git a/pkg/query-service/app/parser.go b/pkg/query-service/app/parser.go
index 4804847ea2..5c44ba19f4 100644
--- a/pkg/query-service/app/parser.go
+++ b/pkg/query-service/app/parser.go
@@ -726,6 +726,14 @@ func parseInviteRequest(r *http.Request) (*model.InviteRequest, error) {
 	return &req, nil
 }
 
+func parseSetApdexScoreRequest(r *http.Request) (*model.ApdexSettings, error) {
+	var req model.ApdexSettings
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		return nil, err
+	}
+	return &req, nil
+}
+
 func parseRegisterRequest(r *http.Request) (*auth.RegisterRequest, error) {
 	var req auth.RegisterRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
diff --git a/pkg/query-service/dao/interface.go b/pkg/query-service/dao/interface.go
index ceece7faef..c1bb852e20 100644
--- a/pkg/query-service/dao/interface.go
+++ b/pkg/query-service/dao/interface.go
@@ -32,6 +32,8 @@ type Queries interface {
 	GetResetPasswordEntry(ctx context.Context, token string) (*model.ResetPasswordEntry, *model.ApiError)
 	GetUsersByOrg(ctx context.Context, orgId string) ([]model.UserPayload, *model.ApiError)
 	GetUsersByGroup(ctx context.Context, groupId string) ([]model.UserPayload, *model.ApiError)
+
+	GetApdexSettings(ctx context.Context, services []string) ([]model.ApdexSettings, *model.ApiError)
 }
 
 type Mutations interface {
@@ -56,4 +58,6 @@ type Mutations interface {
 
 	UpdateUserPassword(ctx context.Context, hash, userId string) *model.ApiError
 	UpdateUserGroup(ctx context.Context, userId, groupId string) *model.ApiError
+
+	SetApdexSettings(ctx context.Context, set *model.ApdexSettings) *model.ApiError
 }
diff --git a/pkg/query-service/dao/sqlite/apdex.go b/pkg/query-service/dao/sqlite/apdex.go
new file mode 100644
index 0000000000..8c74553fb8
--- /dev/null
+++ b/pkg/query-service/dao/sqlite/apdex.go
@@ -0,0 +1,74 @@
+package sqlite
+
+import (
+	"context"
+	"fmt"
+
+	"go.signoz.io/signoz/pkg/query-service/model"
+)
+
+const defaultApdexThreshold = 0.5
+
+func (mds *ModelDaoSqlite) GetApdexSettings(ctx context.Context, services []string) ([]model.ApdexSettings, *model.ApiError) {
+	var apdexSettings []model.ApdexSettings
+	var serviceName string
+
+	for i, service := range services {
+		if i == 0 {
+			serviceName = fmt.Sprintf("'%s'", service)
+		} else {
+			serviceName = fmt.Sprintf("%s, '%s'", serviceName, service)
+		}
+	}
+
+	query := fmt.Sprintf("SELECT * FROM apdex_settings WHERE service_name IN (%s)", serviceName)
+
+	err := mds.db.Select(&apdexSettings, query)
+	if err != nil {
+		return nil, &model.ApiError{
+			Err: err,
+		}
+	}
+
+	// add default apdex settings for services that don't have any
+	for _, service := range services {
+		var found bool
+		for _, apdexSetting := range apdexSettings {
+			if apdexSetting.ServiceName == service {
+				found = true
+				break
+			}
+		}
+
+		if !found {
+			apdexSettings = append(apdexSettings, model.ApdexSettings{
+				ServiceName: service,
+				Threshold:   defaultApdexThreshold,
+			})
+		}
+	}
+
+	return apdexSettings, nil
+}
+
+func (mds *ModelDaoSqlite) SetApdexSettings(ctx context.Context, apdexSettings *model.ApdexSettings) *model.ApiError {
+
+	fmt.Println("apdexSettings:", apdexSettings)
+	_, err := mds.db.NamedExec(`
+	INSERT OR REPLACE INTO apdex_settings (
+		service_name,
+		threshold,
+		exclude_status_codes
+	) VALUES (
+		:service_name,
+		:threshold,
+		:exclude_status_codes
+	)`, apdexSettings)
+	if err != nil {
+		return &model.ApiError{
+			Err: err,
+		}
+	}
+
+	return nil
+}
diff --git a/pkg/query-service/dao/sqlite/connection.go b/pkg/query-service/dao/sqlite/connection.go
index a1b7842bb3..dd113a2863 100644
--- a/pkg/query-service/dao/sqlite/connection.go
+++ b/pkg/query-service/dao/sqlite/connection.go
@@ -73,6 +73,11 @@ func InitDB(dataSourceName string) (*ModelDaoSqlite, error) {
 			flags TEXT,
 			FOREIGN KEY(user_id) REFERENCES users(id)
 		);
+		CREATE TABLE IF NOT EXISTS apdex_settings (
+			service_name TEXT PRIMARY KEY,
+			threshold FLOAT NOT NULL,
+			exclude_status_codes TEXT NOT NULL
+		);
 	`
 
 	_, err = db.Exec(table_schema)
diff --git a/pkg/query-service/interfaces/interface.go b/pkg/query-service/interfaces/interface.go
index f53a3a1fe6..8b3697f89c 100644
--- a/pkg/query-service/interfaces/interface.go
+++ b/pkg/query-service/interfaces/interface.go
@@ -95,6 +95,8 @@ type Reader interface {
 
 	QueryDashboardVars(ctx context.Context, query string) (*model.DashboardVar, error)
 	CheckClickHouse(ctx context.Context) error
+
+	GetLatencyMetricMetadata(context.Context, string, bool) (*v3.LatencyMetricMetadataResponse, error)
 }
 
 type Querier interface {
diff --git a/pkg/query-service/model/db.go b/pkg/query-service/model/db.go
index e043dd2ddd..9ae7270232 100644
--- a/pkg/query-service/model/db.go
+++ b/pkg/query-service/model/db.go
@@ -36,6 +36,12 @@ type User struct {
 	GroupId            string `json:"groupId,omitempty" db:"group_id"`
 }
 
+type ApdexSettings struct {
+	ServiceName        string  `json:"serviceName" db:"service_name"`
+	Threshold          float64 `json:"threshold" db:"threshold"`
+	ExcludeStatusCodes string  `json:"excludeStatusCodes" db:"exclude_status_codes"` // sqlite doesn't support array type
+}
+
 type UserFlag map[string]string
 
 func (uf UserFlag) Value() (driver.Value, error) {
diff --git a/pkg/query-service/model/v3/v3.go b/pkg/query-service/model/v3/v3.go
index d1dab19c0d..4e4fd2c0a1 100644
--- a/pkg/query-service/model/v3/v3.go
+++ b/pkg/query-service/model/v3/v3.go
@@ -663,3 +663,8 @@ func (eq *ExplorerQuery) Validate() error {
 	}
 	return eq.CompositeQuery.Validate()
 }
+
+type LatencyMetricMetadataResponse struct {
+	Delta bool      `json:"delta"`
+	Le    []float64 `json:"le"`
+}