update

backend/app/main.py

@@ -422,33 +422,31 @@ async def push_to_smartlead(request: SmartleadPushRequest, db: Session = Depends
                     failed_count += 1
                     continue
                 
-                # Build lead object - Smartlead API expects custom_variables as array of {name, value} objects
-                # Smartlead API doesn't allow "company" or "title" fields
+                # Build lead object - Smartlead API doesn't allow "company" or "title" fields
+                # Try using "variables" instead of "custom_variables" - some APIs use different field names
                 lead = {
                     "email": email,
                     "first_name": first_name,
-                    "last_name": last_name,
-                    "custom_variables": []
+                    "last_name": last_name
                 }
                 
-                # Add custom variables as array of {name, value} objects
+                # Try "variables" field name (some Smartlead versions may use this instead of custom_variables)
+                variables = {}
                 for i in range(1, 11):
                     if i in contact.get('subjects', {}):
                         subject = contact['subjects'][i]
                         subject_str = safe_str(subject) if subject else ""
                         if subject_str:
-                            lead["custom_variables"].append({
-                                "name": f"subject_{i}",
-                                "value": subject_str
-                            })
+                            variables[f'subject_{i}'] = subject_str
                     if i in contact.get('bodies', {}):
                         body = contact['bodies'][i]
                         body_str = safe_str(body) if body else ""
                         if body_str:
-                            lead["custom_variables"].append({
-                                "name": f"body_{i}",
-                                "value": body_str
-                            })
+                            variables[f'body_{i}'] = body_str
+                
+                # Only add variables if we have any
+                if variables:
+                    lead["variables"] = variables
                 
                 leads.append(lead)