sync fees from API. usdc. trade works

check_api_symbols.py

@@ -0,0 +1,31 @@
+import requests
+
+# Check available API symbols
+try:
+    resp = requests.get('https://api.mexc.com/api/v3/defaultSymbols')
+    data = resp.json()
+    print('Available API symbols:')
+    api_symbols = data.get('data', [])
+    
+    # Show first 10
+    for i, symbol in enumerate(api_symbols[:10]):
+        print(f'  {i+1}. {symbol}')
+    print(f'  ... and {len(api_symbols) - 10} more')
+    
+    # Check for common symbols
+    test_symbols = ['ETHUSDT', 'BTCUSDT', 'MXUSDT', 'BNBUSDT']
+    print('\nChecking test symbols:')
+    for symbol in test_symbols:
+        if symbol in api_symbols:
+            print(f'✅ {symbol} is available for API trading')
+        else:
+            print(f'❌ {symbol} is NOT available for API trading')
+            
+    # Find a good symbol to test with
+    print('\nRecommended symbols for testing:')
+    common_symbols = [s for s in api_symbols if 'USDT' in s][:5]
+    for symbol in common_symbols:
+        print(f'  - {symbol}')
+        
+except Exception as e:
+    print(f'Error: {e}')