diff --git a/nexterp_custom/api.py b/nexterp_custom/api.py
new file mode 100644
index 0000000..ff0cb17
--- /dev/null
+++ b/nexterp_custom/api.py
@@ -0,0 +1,77 @@
+import frappe
+import requests
+from frappe import _
+
+@frappe.whitelist()
+def sync_custom_fields_to_woocommerce(item_code):
+    """Sync Custom Fields vom Item nach WooCommerce (ACF)"""
+    
+    if not item_code:
+        frappe.throw(_("Kein Item Code angegeben"))
+    
+    doc = frappe.get_doc("Item", item_code)
+    
+    if not doc.get("woocommerce_servers"):
+        return False
+    
+    # Hier die Felder definieren: ERPNext-Feldname : ACF-Feldname in WordPress
+    field_mapping = {
+        "custom_zustand2": "zustand2",
+        # Weitere Felder hier hinzufügen, z.B.:
+        # "custom_mein_feld": "mein_feld",
+        # "custom_preisstufe": "preisstufe",
+        # "custom_bemerkung": "bemerkung",
+    }
+    
+    success_count = 0
+    
+    for wc_link in doc.woocommerce_servers:
+        if not wc_link.enable_sync or not wc_link.woocommerce_id:
+            continue
+            
+        try:
+            wc_server = frappe.get_doc("WooCommerce Server", wc_link.woocommerce_server)
+            
+            base_url = wc_server.woocommerce_server_url.rstrip("/")
+            if not base_url.endswith("/wp-json/wc/v3"):
+                base_url += "/wp-json/wc/v3"
+            
+            url = f"{base_url}/products/{wc_link.woocommerce_id}"
+            auth = (wc_server.api_key, wc_server.api_secret)
+            
+            # Aktuelles Produkt holen
+            resp = requests.get(url, auth=auth, timeout=20)
+            resp.raise_for_status()
+            product = resp.json()
+            
+            # ACF Daten aufbauen / mergen
+            acf_data = product.get("acf", {})
+            
+            # Felder übertragen
+            for erp_field, acf_field in field_mapping.items():
+                value = doc.get(erp_field)
+                if value is not None:
+                    acf_data[acf_field] = value
+            
+            payload = {"acf": acf_data}
+            
+            # Update an WooCommerce
+            update_resp = requests.put(url, json=payload, auth=auth, timeout=20)
+            update_resp.raise_for_status()
+            
+            success_count += 1
+            
+        except Exception as e:
+            frappe.log_error(
+                "Fehler beim Sync Custom Fields für Item {}: {}".format(item_code, str(e)),
+                "ACF Custom Fields Sync"
+            )
+    
+    if success_count > 0:
+        frappe.msgprint(
+            "Custom Fields fuer {} WooCommerce-Produkt(e) synchronisiert".format(success_count),
+            alert=True,
+            indicator="green"
+        )
+        return True
+    return False
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