diff --git a/src/proto/grpc/http_over_grpc/BUILD b/src/proto/grpc/http_over_grpc/BUILD
new file mode 100644
index 00000000000..5c60bc5b6be
--- /dev/null
+++ b/src/proto/grpc/http_over_grpc/BUILD
@@ -0,0 +1,31 @@
+# Copyright 2019 gRPC authors.
+#
+# 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.
+
+licenses(["notice"])  # Apache v2
+
+load("//bazel:grpc_build_system.bzl", "grpc_package", "grpc_proto_library")
+
+grpc_package(
+    name = "http_over_grpc",
+    visibility = "public",
+)
+
+grpc_proto_library(
+    name = "http_over_grpc_proto",
+    srcs = [
+        "http_over_grpc.proto",
+    ],
+    has_services = True,
+    well_known_protos = True,
+)
diff --git a/src/proto/grpc/http_over_grpc/http_over_grpc.proto b/src/proto/grpc/http_over_grpc/http_over_grpc.proto
new file mode 100644
index 00000000000..352d660227f
--- /dev/null
+++ b/src/proto/grpc/http_over_grpc/http_over_grpc.proto
@@ -0,0 +1,52 @@
+// Copyright 2019 The gRPC Authors
+//
+// 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.
+
+syntax = "proto3";
+
+package grpc.http_over_grpc;
+
+//option go_package = "google.golang.org/grpc/http_over_grpc/...";
+
+// Represents HTTP 1.1 header.
+message Header {
+  string key = 1;
+  repeated string values = 2;
+}
+
+// An HTTP 1.1 request encapsulated in a gRPC.
+message HTTPOverGRPCRequest {
+  // The HTTP request method.
+  string method = 1;
+  // The HTTP request URL.
+  string url = 2;
+  // The HTTP request headers.
+  repeated Header headers = 3;
+  // HTTP request body.
+  bytes body = 4;
+}
+
+// An HTTP 1.1 reply encapsulated in an RPC.
+message HTTPOverGRPCReply {
+  // The HTTP status code (e.g. 200, 400, 404).
+  int32 status = 1;
+  // The HTTP response headers.
+  repeated Header headers = 2;
+  // The HTTP response body.
+  bytes body = 3;
+}
+
+service HTTPOverGRPC {
+ // Perform the given HTTP request.
+ rpc HTTPRequest(HTTPOverGRPCRequest) returns (HTTPOverGRPCReply) {}
+}