diff --git a/cmd/server/main.go b/cmd/server/main.go
index 71df5df..899042a 100644
--- a/cmd/server/main.go
+++ b/cmd/server/main.go
@@ -225,6 +225,7 @@ func main() {
 
 	protected.Post("/auth/consents", consentH.Accept)
 	protected.Get("/auth/consents", consentH.Status)
+	protected.Post("/debug/log", h.DebugLog)
 
 	app.Get("/ws", ws.AuthMiddleware(authSvc), ws.Upgrade, ws.Handler(hub))
 
diff --git a/internal/handlers/handlers.go b/internal/handlers/handlers.go
index efb3442..df620d7 100644
--- a/internal/handlers/handlers.go
+++ b/internal/handlers/handlers.go
@@ -1,6 +1,7 @@
 package handlers
 
 import (
+	"log/slog"
 	"strings"
 	"time"
 
@@ -321,3 +322,30 @@ func age(birth *time.Time) *int {
 	}
 	return &a
 }
+
+// DebugLog — клиент-сайд диагностика (приходит из JS через api.js)
+type debugLogReq struct {
+	Path        string `json:"path"`
+	Status      int    `json:"status"`
+	Ms          int    `json:"ms"`
+	UA          string `json:"ua"`
+	Err         string `json:"err,omitempty"`
+	IsTelegram  bool   `json:"is_telegram"`
+}
+
+func (h *Handlers) DebugLog(c *fiber.Ctx) error {
+	var req debugLogReq
+	if err := c.BodyParser(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "bad body"})
+	}
+	slog.Info("client-debug",
+		"path", req.Path,
+		"status", req.Status,
+		"ms", req.Ms,
+		"is_tg", req.IsTelegram,
+		"ua", req.UA,
+		"err", req.Err,
+		"ip", c.IP(),
+	)
+	return c.JSON(fiber.Map{"ok": true})
+}