diff --git a/esphome/components/api/api_frame_helper_plaintext.cpp b/esphome/components/api/api_frame_helper_plaintext.cpp
index 1335ae5e60..793cece3b8 100644
--- a/esphome/components/api/api_frame_helper_plaintext.cpp
+++ b/esphome/components/api/api_frame_helper_plaintext.cpp
@@ -138,7 +138,8 @@ APIError APIPlaintextFrameHelper::try_read_frame_() {
 
     if (msg_size_varint.value > MAX_MESSAGE_SIZE) {
       state_ = State::FAILED;
-      HELPER_LOG("Bad packet: message size %" PRIu32 " exceeds maximum %u", msg_size_varint.value, MAX_MESSAGE_SIZE);
+      HELPER_LOG("Bad packet: message size %" PRIu32 " exceeds maximum %u",
+                 static_cast<uint32_t>(msg_size_varint.value), MAX_MESSAGE_SIZE);
       return APIError::BAD_DATA_PACKET;
     }
     rx_header_parsed_len_ = static_cast<uint16_t>(msg_size_varint.value);
@@ -153,8 +154,8 @@ APIError APIPlaintextFrameHelper::try_read_frame_() {
     }
     if (msg_type_varint.value > std::numeric_limits<uint16_t>::max()) {
       state_ = State::FAILED;
-      HELPER_LOG("Bad packet: message type %" PRIu32 " exceeds maximum %u", msg_type_varint.value,
-                 std::numeric_limits<uint16_t>::max());
+      HELPER_LOG("Bad packet: message type %" PRIu32 " exceeds maximum %u",
+                 static_cast<uint32_t>(msg_type_varint.value), std::numeric_limits<uint16_t>::max());
       return APIError::BAD_DATA_PACKET;
     }
     rx_header_parsed_type_ = static_cast<uint16_t>(msg_type_varint.value);
diff --git a/script/api_protobuf/api_protobuf.py b/script/api_protobuf/api_protobuf.py
index e7fdbfd896..1c2a3e5cc2 100755
--- a/script/api_protobuf/api_protobuf.py
+++ b/script/api_protobuf/api_protobuf.py
@@ -193,7 +193,6 @@ class TypeInfo(ABC):
         return f"case {self.number}: this->{self.field_name} = {content}; break;"
 
     decode_varint = None
-    is_varint64 = False
 
     @property
     def decode_length_content(self) -> str:
@@ -463,7 +462,6 @@ class Int64Type(TypeInfo):
     cpp_type = "int64_t"
     default_value = "0"
     decode_varint = "static_cast<int64_t>(value)"
-    is_varint64 = True
     encode_func = "encode_int64"
     wire_type = WireType.VARINT  # Uses wire type 0
 
@@ -484,7 +482,6 @@ class UInt64Type(TypeInfo):
     cpp_type = "uint64_t"
     default_value = "0"
     decode_varint = "value"
-    is_varint64 = True
     encode_func = "encode_uint64"
     wire_type = WireType.VARINT  # Uses wire type 0
 
@@ -1286,7 +1283,6 @@ class SInt64Type(TypeInfo):
     cpp_type = "int64_t"
     default_value = "0"
     decode_varint = "decode_zigzag64(value)"
-    is_varint64 = True
     encode_func = "encode_sint64"
     wire_type = WireType.VARINT  # Uses wire type 0
 
@@ -1624,10 +1620,6 @@ class RepeatedTypeInfo(TypeInfo):
         """
         return self._ti.wire_type
 
-    @property
-    def is_varint64(self):
-        return self._ti.is_varint64
-
     @property
     def decode_varint_content(self) -> str:
         # Pointer fields don't support decoding