diff --git a/apps/api-server/internal/config/config.go b/apps/api-server/internal/config/config.go
index 10d412d..268fae5 100644
--- a/apps/api-server/internal/config/config.go
+++ b/apps/api-server/internal/config/config.go
@@ -5,15 +5,30 @@ import (
 )
 
 type Config struct {
-	Server   ServerConfig   `json:"server"`
-	Database DatabaseConfig `json:"database"`
-	Redis    RedisConfig    `json:"redis"`
-	IMSI     IMSIConfig      `json:"imsi"`
-	ES2      ES2Config       `json:"es2"`
+	Server         ServerConfig         `json:"server"`
+	Database       DatabaseConfig       `json:"database"`
+	Redis          RedisConfig          `json:"redis"`
+	IMSI           IMSIConfig           `json:"imsi"`
+	ES2            ES2Config            `json:"es2"`
+	Payment        PaymentConfig        `json:"payment"`
+	ChargingEngine ChargingEngineConfig `json:"charging_engine"`
+	InfluxDB       InfluxDBConfig       `json:"influxdb"`
+}
+
+type ChargingEngineConfig struct {
+	BaseURL string        `json:"base_url"`
+	Timeout time.Duration `json:"timeout"`
+}
+
+type PaymentConfig struct {
+	Provider            string `json:"provider"`
+	StripeAPIKey        string `json:"stripe_api_key"`
+	StripeWebhookSecret string `json:"stripe_webhook_secret"`
 }
 
 type ServerConfig struct {
 	Port         string        `json:"port"`
+	MetricsPort  string        `json:"metrics_port"`
 	ReadTimeout  time.Duration `json:"read_timeout"`
 	WriteTimeout time.Duration `json:"write_timeout"`
 }
@@ -35,15 +50,22 @@ type RedisConfig struct {
 }
 
 type IMSIConfig struct {
-	Prefix string `json:"prefix"`
+	Prefix  string `json:"prefix"`
 	MinIMSI uint64 `json:"min_imsi"`
 	MaxIMSI uint64 `json:"max_imsi"`
 }
 
+type InfluxDBConfig struct {
+	URL    string `json:"url"`
+	Token  string `json:"token"`
+	Org    string `json:"org"`
+	Bucket string `json:"bucket"`
+}
+
 type ES2Config struct {
-	BaseURL              string `json:"base_url"`
-	APIKey               string `json:"api_key"`
-	InsecureSkipVerify   bool   `json:"insecure_skip_verify"`
+	BaseURL                  string `json:"base_url"`
+	APIKey                   string `json:"api_key"`
+	InsecureSkipVerify       bool   `json:"insecure_skip_verify"`
 	FunctionalityRequesterID string `json:"functionality_requester_id"`
 }
 
@@ -51,6 +73,7 @@ func LoadConfig() *Config {
 	return &Config{
 		Server: ServerConfig{
 			Port:         "8000",
+			MetricsPort:  "9090",
 			ReadTimeout:  30 * time.Second,
 			WriteTimeout: 30 * time.Second,
 		},
@@ -69,15 +92,30 @@ func LoadConfig() *Config {
 			DB:       0,
 		},
 		IMSI: IMSIConfig{
-			Prefix: "20893", // France MCC+MNC
+			Prefix:  "20893", // France MCC+MNC
 			MinIMSI: 1,
 			MaxIMSI: 999999999,
 		},
 		ES2: ES2Config{
-			BaseURL:                "https://smdp.example.com",
-			APIKey:                 "",
-			InsecureSkipVerify:     true,
+			BaseURL:                  "https://smdp.example.com",
+			APIKey:                   "",
+			InsecureSkipVerify:       true,
 			FunctionalityRequesterID: "telecom-platform",
 		},
+		Payment: PaymentConfig{
+			Provider:            "stripe",
+			StripeAPIKey:        "",
+			StripeWebhookSecret: "",
+		},
+		ChargingEngine: ChargingEngineConfig{
+			BaseURL: "http://localhost:3001",
+			Timeout: 10 * time.Second,
+		},
+		InfluxDB: InfluxDBConfig{
+			URL:    "http://localhost:8086",
+			Token:  "",
+			Org:    "telecom",
+			Bucket: "telecom",
+		},
 	}
 }