diff --git a/internal/client/telegram.go b/internal/client/telegram.go
index d381fee..eb50f2f 100644
--- a/internal/client/telegram.go
+++ b/internal/client/telegram.go
@@ -84,3 +84,11 @@ func (t *Telegram) SendVerification(data *models.Verification, url string, isUpd
 
 	return nil
 }
+
+func (t *Telegram) Ping() error {
+	_, err := t.bot.GetMe()
+	if err != nil {
+		return fmt.Errorf("error pinging tg bot: %w", err)
+	}
+	return nil
+}
diff --git a/internal/controllers/admin/health_check/health_check.go b/internal/controllers/admin/health_check/health_check.go
index 9ac31a4..7af4c0d 100644
--- a/internal/controllers/admin/health_check/health_check.go
+++ b/internal/controllers/admin/health_check/health_check.go
@@ -1,13 +1,34 @@
 package health_check
 
-import "github.com/gofiber/fiber/v2"
+import (
+	"context"
+	"fmt"
+	"gitea.pena/PenaSide/verification/internal/client"
+	"gitea.pena/PenaSide/verification/internal/repository"
+	"github.com/gofiber/fiber/v2"
+	"github.com/minio/minio-go/v7"
+	"go.mongodb.org/mongo-driver/mongo"
+	"time"
+)
 
-type Deps struct{}
+type Deps struct {
+	TgClient *client.Telegram
+	MongoDB  *mongo.Client
+	S3Client *minio.Client
+}
 
-type HealthCheck struct{}
+type HealthCheck struct {
+	tgClient *client.Telegram
+	mongoDB  *mongo.Client
+	s3Client *minio.Client
+}
 
 func NewHealthCheck(deps Deps) *HealthCheck {
-	return &HealthCheck{}
+	return &HealthCheck{
+		tgClient: deps.TgClient,
+		mongoDB:  deps.MongoDB,
+		s3Client: deps.S3Client,
+	}
 }
 
 func (receiver *HealthCheck) Liveness(ctx *fiber.Ctx) error {
@@ -15,6 +36,45 @@ func (receiver *HealthCheck) Liveness(ctx *fiber.Ctx) error {
 }
 
 func (receiver *HealthCheck) Readiness(ctx *fiber.Ctx) error {
-	// todo
+	if err := receiver.checkMongoDB(); err != nil {
+		return ctx.Status(fiber.StatusServiceUnavailable).SendString("mongoDB is unavailable: " + err.Error())
+	}
+
+	if err := receiver.tgClient.Ping(); err != nil {
+		return ctx.Status(fiber.StatusServiceUnavailable).SendString("could not connect to Telegram: " + err.Error())
+	}
+
+	if err := receiver.checkS3(); err != nil {
+		return ctx.Status(fiber.StatusServiceUnavailable).SendString("could not connect to S3: " + err.Error())
+	}
+
 	return ctx.SendStatus(fiber.StatusOK)
 }
+
+func (receiver *HealthCheck) checkMongoDB() error {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err := receiver.mongoDB.Ping(ctx, nil); err != nil {
+		return fmt.Errorf("failed to ping MongoDB: %v", err)
+	}
+	return nil
+}
+
+func (receiver *HealthCheck) checkS3() error {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	buckets, err := receiver.s3Client.ListBuckets(ctx)
+	if err != nil {
+		return fmt.Errorf("failed to list buckets: %v", err)
+	}
+
+	for _, b := range buckets {
+		if b.Name == repository.VerificationBucket {
+			return nil
+		}
+	}
+
+	return fmt.Errorf("failed to find verification bucket")
+}