diff --git a/esphome/components/api/proto.cpp b/esphome/components/api/proto.cpp
index f99e5b66e5..4f0d0846d7 100644
--- a/esphome/components/api/proto.cpp
+++ b/esphome/components/api/proto.cpp
@@ -22,7 +22,7 @@ uint32_t ProtoDecodableMessage::count_repeated_field(const uint8_t *buffer, size
     }
 
     uint32_t tag = res->as_uint32();
-    uint32_t field_type = tag & 0b111;
+    uint32_t field_type = tag & WIRE_TYPE_MASK;
     uint32_t field_id = tag >> 3;
     ptr += consumed;
 
@@ -33,7 +33,7 @@ uint32_t ProtoDecodableMessage::count_repeated_field(const uint8_t *buffer, size
 
     // Skip field data based on wire type
     switch (field_type) {
-      case 0: {  // VarInt - parse and skip
+      case WIRE_TYPE_VARINT: {  // VarInt - parse and skip
         res = ProtoVarInt::parse(ptr, end - ptr, &consumed);
         if (!res.has_value()) {
           return count;  // Invalid data, return what we have
@@ -41,7 +41,7 @@ uint32_t ProtoDecodableMessage::count_repeated_field(const uint8_t *buffer, size
         ptr += consumed;
         break;
       }
-      case 2: {  // Length-delimited - parse length and skip data
+      case WIRE_TYPE_LENGTH_DELIMITED: {  // Length-delimited - parse length and skip data
         res = ProtoVarInt::parse(ptr, end - ptr, &consumed);
         if (!res.has_value()) {
           return count;
@@ -54,7 +54,7 @@ uint32_t ProtoDecodableMessage::count_repeated_field(const uint8_t *buffer, size
         ptr += field_length;
         break;
       }
-      case 5: {  // 32-bit - skip 4 bytes
+      case WIRE_TYPE_FIXED32: {  // 32-bit - skip 4 bytes
         if (ptr + 4 > end) {
           return count;
         }
@@ -85,12 +85,12 @@ void ProtoDecodableMessage::decode(const uint8_t *buffer, size_t length) {
     }
 
     uint32_t tag = res->as_uint32();
-    uint32_t field_type = tag & 0b111;
+    uint32_t field_type = tag & WIRE_TYPE_MASK;
     uint32_t field_id = tag >> 3;
     ptr += consumed;
 
     switch (field_type) {
-      case 0: {  // VarInt
+      case WIRE_TYPE_VARINT: {  // VarInt
         res = ProtoVarInt::parse(ptr, end - ptr, &consumed);
         if (!res.has_value()) {
           ESP_LOGV(TAG, "Invalid VarInt at offset %ld", (long) (ptr - buffer));
@@ -102,7 +102,7 @@ void ProtoDecodableMessage::decode(const uint8_t *buffer, size_t length) {
         ptr += consumed;
         break;
       }
-      case 2: {  // Length-delimited
+      case WIRE_TYPE_LENGTH_DELIMITED: {  // Length-delimited
         res = ProtoVarInt::parse(ptr, end - ptr, &consumed);
         if (!res.has_value()) {
           ESP_LOGV(TAG, "Invalid Length Delimited at offset %ld", (long) (ptr - buffer));
@@ -120,7 +120,7 @@ void ProtoDecodableMessage::decode(const uint8_t *buffer, size_t length) {
         ptr += field_length;
         break;
       }
-      case 5: {  // 32-bit
+      case WIRE_TYPE_FIXED32: {  // 32-bit
         if (ptr + 4 > end) {
           ESP_LOGV(TAG, "Out-of-bounds Fixed32-bit at offset %ld", (long) (ptr - buffer));
           return;
diff --git a/esphome/components/api/proto.h b/esphome/components/api/proto.h
index 50f85fb247..e7585924a5 100644
--- a/esphome/components/api/proto.h
+++ b/esphome/components/api/proto.h
@@ -15,6 +15,13 @@
 
 namespace esphome::api {
 
+// Protocol Buffer wire type constants
+// See https://protobuf.dev/programming-guides/encoding/#structure
+constexpr uint8_t WIRE_TYPE_VARINT = 0;            // int32, int64, uint32, uint64, sint32, sint64, bool, enum
+constexpr uint8_t WIRE_TYPE_LENGTH_DELIMITED = 2;  // string, bytes, embedded messages, packed repeated fields
+constexpr uint8_t WIRE_TYPE_FIXED32 = 5;           // fixed32, sfixed32, float
+constexpr uint8_t WIRE_TYPE_MASK = 0b111;          // Mask to extract wire type from tag
+
 // Helper functions for ZigZag encoding/decoding
 inline constexpr uint32_t encode_zigzag32(int32_t value) {
   return (static_cast<uint32_t>(value) << 1) ^ (static_cast<uint32_t>(value >> 31));
@@ -241,7 +248,7 @@ class ProtoWriteBuffer {
    * Following https://protobuf.dev/programming-guides/encoding/#structure
    */
   void encode_field_raw(uint32_t field_id, uint32_t type) {
-    uint32_t val = (field_id << 3) | (type & 0b111);
+    uint32_t val = (field_id << 3) | (type & WIRE_TYPE_MASK);
     this->encode_varint_raw(val);
   }
   void encode_string(uint32_t field_id, const char *string, size_t len, bool force = false) {
@@ -493,7 +500,7 @@ class ProtoSize {
    * @return The number of bytes needed to encode the field ID and wire type
    */
   static constexpr uint32_t field(uint32_t field_id, uint32_t type) {
-    uint32_t tag = (field_id << 3) | (type & 0b111);
+    uint32_t tag = (field_id << 3) | (type & WIRE_TYPE_MASK);
     return varint(tag);
   }
 
diff --git a/script/api_protobuf/api_protobuf.py b/script/api_protobuf/api_protobuf.py
index f58442ff01..4936434fc2 100755
--- a/script/api_protobuf/api_protobuf.py
+++ b/script/api_protobuf/api_protobuf.py
@@ -11,6 +11,7 @@ from typing import Any
 
 import aioesphomeapi.api_options_pb2 as pb
 import google.protobuf.descriptor_pb2 as descriptor
+from google.protobuf.descriptor_pb2 import FieldDescriptorProto
 
 
 class WireType(IntEnum):
@@ -148,7 +149,7 @@ class TypeInfo(ABC):
     @property
     def repeated(self) -> bool:
         """Check if the field is repeated."""
-        return self._field.label == 3
+        return self._field.label == FieldDescriptorProto.LABEL_REPEATED
 
     @property
     def wire_type(self) -> WireType:
@@ -337,7 +338,7 @@ def create_field_type_info(
     needs_encode: bool = True,
 ) -> TypeInfo:
     """Create the appropriate TypeInfo instance for a field, handling repeated fields and custom options."""
-    if field.label == 3:  # repeated
+    if field.label == FieldDescriptorProto.LABEL_REPEATED:
         # Check if this repeated field has fixed_array_with_length_define option
         if (
             fixed_size := get_field_opt(field, pb.fixed_array_with_length_define)
@@ -1890,7 +1891,7 @@ def build_message_type(
         # Validate that fixed_array_size is only used in encode-only messages
         if (
             needs_decode
-            and field.label == 3
+            and field.label == FieldDescriptorProto.LABEL_REPEATED
             and get_field_opt(field, pb.fixed_array_size) is not None
         ):
             raise ValueError(
@@ -1903,7 +1904,7 @@ def build_message_type(
         # Validate that fixed_array_with_length_define is only used in encode-only messages
         if (
             needs_decode
-            and field.label == 3
+            and field.label == FieldDescriptorProto.LABEL_REPEATED
             and get_field_opt(field, pb.fixed_array_with_length_define) is not None
         ):
             raise ValueError(
@@ -1916,7 +1917,7 @@ def build_message_type(
         # Collect fixed_vector repeated fields for custom decode generation
         if (
             needs_decode
-            and field.label == 3
+            and field.label == FieldDescriptorProto.LABEL_REPEATED
             and get_field_opt(field, pb.fixed_vector, False)
         ):
             fixed_vector_fields.append((field.name, field.number))