diff --git a/backend/internal/service/callback.go b/backend/internal/service/callback.go
index 52cdb9c..4a9798d 100644
--- a/backend/internal/service/callback.go
+++ b/backend/internal/service/callback.go
@@ -10,6 +10,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log"
 	"net/http"
 	"net/url"
 	"strings"
@@ -236,11 +237,13 @@ func (s *CallbackService) dispatchOne(ctx context.Context, id uint) (bool, bool,
 
 	resp, err := s.httpClient.Do(req)
 	if err != nil {
+		log.Printf("[callback] push fail event=%s event_id=%s merchant_id=%d url=%s err=%s", delivery.Event, delivery.EventID, delivery.MerchantID, delivery.CallbackSubscription.URL, truncateCallbackError(err.Error()))
 		return false, true, s.recordCallbackFailure(delivery, 0, truncateCallbackError(err.Error()))
 	}
 	defer resp.Body.Close()
 	body, _ := io.ReadAll(io.LimitReader(resp.Body, 4096))
 	if resp.StatusCode >= http.StatusOK && resp.StatusCode < http.StatusMultipleChoices {
+		log.Printf("[callback] push ok event=%s event_id=%s merchant_id=%d url=%s status=%d", delivery.Event, delivery.EventID, delivery.MerchantID, delivery.CallbackSubscription.URL, resp.StatusCode)
 		return true, true, s.db.Model(&model.CallbackDelivery{}).Where("id = ?", delivery.ID).Updates(map[string]interface{}{
 			"status":           model.CallbackDeliveryDelivered,
 			"attempts":         delivery.Attempts + 1,
@@ -249,6 +252,7 @@ func (s *CallbackService) dispatchOne(ctx context.Context, id uint) (bool, bool,
 			"delivered_at":     time.Now(),
 		}).Error
 	}
+	log.Printf("[callback] push fail event=%s event_id=%s merchant_id=%d url=%s status=%d body=%s", delivery.Event, delivery.EventID, delivery.MerchantID, delivery.CallbackSubscription.URL, resp.StatusCode, truncateCallbackError(string(body)))
 	return false, true, s.recordCallbackFailure(delivery, resp.StatusCode, string(body))
 }
 
@@ -273,7 +277,12 @@ func (s *CallbackService) Run(ctx context.Context) {
 	ticker := time.NewTicker(3 * time.Second)
 	defer ticker.Stop()
 	for {
-		_, _, _ = s.DispatchDue(ctx, 50)
+		successes, failures, err := s.DispatchDue(ctx, 50)
+		if err != nil {
+			log.Printf("[callback] dispatch error: %v", err)
+		} else if successes > 0 || failures > 0 {
+			log.Printf("[callback] dispatch done successes=%d failures=%d", successes, failures)
+		}
 		select {
 		case <-ctx.Done():
 			return