diff --git a/BUILD b/BUILD
index 8b3301990..66c3371d6 100644
--- a/BUILD
+++ b/BUILD
@@ -38,6 +38,7 @@ cc_library(
     name = "wasm_vm_headers",
     hdrs = [
         "include/proxy-wasm/limits.h",
+        "include/proxy-wasm/sdk.h",
         "include/proxy-wasm/wasm_vm.h",
         "include/proxy-wasm/word.h",
     ],
diff --git a/include/proxy-wasm/context.h b/include/proxy-wasm/context.h
index ab99cad70..12937041f 100644
--- a/include/proxy-wasm/context.h
+++ b/include/proxy-wasm/context.h
@@ -26,13 +26,11 @@
 #include <string_view>
 #include <vector>
 
+#include "include/proxy-wasm/sdk.h"
 #include "include/proxy-wasm/context_interface.h"
 
 namespace proxy_wasm {
 
-#include "proxy_wasm_common.h"
-#include "proxy_wasm_enums.h"
-
 class PluginHandleBase;
 class WasmBase;
 class WasmVm;
diff --git a/include/proxy-wasm/context_interface.h b/include/proxy-wasm/context_interface.h
index 81973eed2..48fce76d9 100644
--- a/include/proxy-wasm/context_interface.h
+++ b/include/proxy-wasm/context_interface.h
@@ -25,10 +25,9 @@
 #include <memory>
 #include <vector>
 
-namespace proxy_wasm {
+#include "include/proxy-wasm/sdk.h"
 
-#include "proxy_wasm_common.h"
-#include "proxy_wasm_enums.h"
+namespace proxy_wasm {
 
 using Pairs = std::vector<std::pair<std::string_view, std::string_view>>;
 using PairsWithStringValues = std::vector<std::pair<std::string_view, std::string>>;
diff --git a/include/proxy-wasm/pairs_util.h b/include/proxy-wasm/pairs_util.h
index 54df2fd88..019c970ba 100644
--- a/include/proxy-wasm/pairs_util.h
+++ b/include/proxy-wasm/pairs_util.h
@@ -15,6 +15,7 @@
 
 #pragma once
 
+#include <cstddef>
 #include <string>
 #include <string_view>
 #include <vector>
diff --git a/include/proxy-wasm/sdk.h b/include/proxy-wasm/sdk.h
new file mode 100644
index 000000000..105854373
--- /dev/null
+++ b/include/proxy-wasm/sdk.h
@@ -0,0 +1,50 @@
+// Copyright 2016-2019 Envoy Project Authors
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <string>
+#include <cstdint>
+
+namespace proxy_wasm {
+
+namespace internal {
+
+// isolate those includes to prevent ::proxy_wasm namespace pollution with std
+// namespace definitions.
+#include "proxy_wasm_common.h"
+#include "proxy_wasm_enums.h"
+
+} // namespace internal
+
+// proxy_wasm_common.h
+using WasmResult = internal::WasmResult;
+using WasmHeaderMapType = internal::WasmHeaderMapType;
+using WasmBufferType = internal::WasmBufferType;
+using WasmBufferFlags = internal::WasmBufferFlags;
+using WasmStreamType = internal::WasmStreamType;
+
+// proxy_wasm_enums.h
+using LogLevel = internal::LogLevel;
+using FilterStatus = internal::FilterStatus;
+using FilterHeadersStatus = internal::FilterHeadersStatus;
+using FilterMetadataStatus = internal::FilterMetadataStatus;
+using FilterTrailersStatus = internal::FilterTrailersStatus;
+using FilterDataStatus = internal::FilterDataStatus;
+using GrpcStatus = internal::GrpcStatus;
+using MetricType = internal::MetricType;
+using CloseType = internal::CloseType;
+
+} // namespace proxy_wasm
diff --git a/include/proxy-wasm/vm_id_handle.h b/include/proxy-wasm/vm_id_handle.h
index 547eca229..16ebb4bf0 100644
--- a/include/proxy-wasm/vm_id_handle.h
+++ b/include/proxy-wasm/vm_id_handle.h
@@ -15,8 +15,10 @@
 #pragma once
 
 #include <functional>
-#include <mutex>
 #include <memory>
+#include <mutex>
+#include <string>
+#include <string_view>
 #include <unordered_map>
 
 namespace proxy_wasm {
diff --git a/include/proxy-wasm/wasm.h b/include/proxy-wasm/wasm.h
index 1a785a8f9..9fa2bda1f 100644
--- a/include/proxy-wasm/wasm.h
+++ b/include/proxy-wasm/wasm.h
@@ -24,6 +24,7 @@
 #include <unordered_map>
 #include <unordered_set>
 
+#include "include/proxy-wasm/sdk.h"
 #include "include/proxy-wasm/context.h"
 #include "include/proxy-wasm/exports.h"
 #include "include/proxy-wasm/wasm_vm.h"
@@ -31,8 +32,6 @@
 
 namespace proxy_wasm {
 
-#include "proxy_wasm_common.h"
-
 class ContextBase;
 class WasmHandleBase;
 
diff --git a/include/proxy-wasm/wasm_api_impl.h b/include/proxy-wasm/wasm_api_impl.h
index 8bd9626ff..899af7e41 100644
--- a/include/proxy-wasm/wasm_api_impl.h
+++ b/include/proxy-wasm/wasm_api_impl.h
@@ -30,15 +30,13 @@
 #include <utility>
 #include <vector>
 
+#include "include/proxy-wasm/sdk.h"
 #include "include/proxy-wasm/exports.h"
 #include "include/proxy-wasm/word.h"
 
 namespace proxy_wasm {
 namespace null_plugin {
 
-#include "proxy_wasm_enums.h"
-#include "proxy_wasm_common.h"
-
 #define WS(_x) Word(static_cast<uint64_t>(_x))
 #define WR(_x) Word(reinterpret_cast<uint64_t>(_x))
 
diff --git a/include/proxy-wasm/wasm_vm.h b/include/proxy-wasm/wasm_vm.h
index acf0ccf3b..a573212e0 100644
--- a/include/proxy-wasm/wasm_vm.h
+++ b/include/proxy-wasm/wasm_vm.h
@@ -19,16 +19,16 @@
 #include <memory>
 #include <optional>
 #include <string>
+#include <string_view>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>
 
+#include "include/proxy-wasm/sdk.h"
 #include "include/proxy-wasm/word.h"
 
 namespace proxy_wasm {
 
-#include "proxy_wasm_enums.h"
-
 class ContextBase;
 
 // These are templates and its helper for constructing signatures of functions calling into Wasm
diff --git a/include/proxy-wasm/word.h b/include/proxy-wasm/word.h
index 90ea932df..bc0d23a8c 100644
--- a/include/proxy-wasm/word.h
+++ b/include/proxy-wasm/word.h
@@ -17,9 +17,9 @@
 
 #include <iostream>
 
-namespace proxy_wasm {
+#include "include/proxy-wasm/sdk.h"
 
-#include "proxy_wasm_common.h"
+namespace proxy_wasm {
 
 // Use byteswap functions only when compiling for big-endian platforms.
 #if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) &&                                    \
diff --git a/test/fuzz/pairs_util_fuzzer.cc b/test/fuzz/pairs_util_fuzzer.cc
index aaef0d099..84e7ca0f1 100644
--- a/test/fuzz/pairs_util_fuzzer.cc
+++ b/test/fuzz/pairs_util_fuzzer.cc
@@ -14,6 +14,7 @@
 
 #include "include/proxy-wasm/pairs_util.h"
 
+#include <cstdint>
 #include <cstring>
 
 namespace proxy_wasm {