diff --git a/esphome/components/api/api_pb2.cpp b/esphome/components/api/api_pb2.cpp
index 9d8b109986..f2c4d1797f 100644
--- a/esphome/components/api/api_pb2.cpp
+++ b/esphome/components/api/api_pb2.cpp
@@ -1938,15 +1938,11 @@ void BluetoothGATTService::calculate_size(uint32_t &total_size) const {
 }
 void BluetoothGATTGetServicesResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
-  for (const auto &it : this->services) {
-    buffer.encode_message(2, it, true);
-  }
+  buffer.encode_message(2, this->services[0], true);
 }
 void BluetoothGATTGetServicesResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_uint64_field(total_size, 1, this->address);
-  for (const auto &it : this->services) {
-    ProtoSize::add_message_object_repeated(total_size, 1, it);
-  }
+  ProtoSize::add_message_object_repeated(total_size, 1, this->services[0]);
 }
 void BluetoothGATTGetServicesDoneResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
diff --git a/script/api_protobuf/api_protobuf.py b/script/api_protobuf/api_protobuf.py
index 453f4ffe10..b9d7f1fd6e 100755
--- a/script/api_protobuf/api_protobuf.py
+++ b/script/api_protobuf/api_protobuf.py
@@ -929,6 +929,14 @@ class FixedArrayRepeatedType(TypeInfo):
 
     @property
     def encode_content(self) -> str:
+        # Special case for single-element arrays - no loop needed
+        if self.array_size == 1:
+            if isinstance(self._ti, EnumType):
+                return f"buffer.{self._ti.encode_func}({self.number}, static_cast<uint32_t>(this->{self.field_name}[0]), true);"
+            else:
+                return f"buffer.{self._ti.encode_func}({self.number}, this->{self.field_name}[0], true);"
+
+        # Multiple elements need a loop
         o = f"for (const auto &it : this->{self.field_name}) {{\n"
         if isinstance(self._ti, EnumType):
             o += f"  buffer.{self._ti.encode_func}({self.number}, static_cast<uint32_t>(it), true);\n"
@@ -953,6 +961,11 @@ class FixedArrayRepeatedType(TypeInfo):
 
     def get_size_calculation(self, name: str, force: bool = False) -> str:
         # For fixed arrays, we always encode all elements
+
+        # Special case for single-element arrays - no loop needed
+        if self.array_size == 1:
+            return self._ti.get_size_calculation(f"{name}[0]", True)
+
         # Check if this is a fixed-size type by seeing if it has a fixed byte count
         num_bytes = self._ti.get_fixed_size_bytes()
         if num_bytes is not None: