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diff --git a/src/buildtool/serve_api/serve_service/target.hpp b/src/buildtool/serve_api/serve_service/target.hpp
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+++ b/src/buildtool/serve_api/serve_service/target.hpp
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+// Copyright 2023 Huawei Cloud Computing Technology Co., Ltd.
+//
+// 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.
+
+#ifndef INCLUDED_SRC_BUILD_SERVE_API_SERVE_SERVICE_TARGET_HPP
+#define INCLUDED_SRC_BUILD_SERVE_API_SERVE_SERVICE_TARGET_HPP
+
+#include <filesystem>
+#include <memory>
+#include <optional>
+
+#include "justbuild/just_serve/just_serve.grpc.pb.h"
+#include "src/buildtool/common/remote/remote_common.hpp"
+#include "src/buildtool/execution_api/common/create_execution_api.hpp"
+#include "src/buildtool/execution_api/remote/config.hpp"
+#include "src/buildtool/logging/logger.hpp"
+
+#include <gsl/gsl>
+
+class TargetService final : public justbuild::just_serve::Target::Service {
+  public:
+    // Given a target-level caching key, returns the computed value. In doing
+    // so, it can build on the associated end-point passing the
+    // RemoteExecutionProperties contained in the ServeTargetRequest.
+    //
+    // If the status has a code different from `OK`, the response MUST not be
+    // used.
+    //
+    // Errors:
+    // * `FAILED_PRECONDITION`: Failed to find required information in the CAS
+    //   or the target cache key is malformed.
+    // * `UNAVAILABLE`: Could not communicate with the remote execution
+    //   endpoint.
+    // * `INTERNAL`: Internally, something is very broken.
+    auto ServeTarget(
+        ::grpc::ServerContext* /*context*/,
+        const ::justbuild::just_serve::ServeTargetRequest* /*request*/,
+        ::justbuild::just_serve::ServeTargetResponse* /*response*/)
+        -> ::grpc::Status override;
+
+    // Given the target-level root tree and the name of an export target,
+    // returns the list of flexible variables from that target's description.
+    //
+    // If the status has a code different from `OK`, the response MUST not be
+    // used.
+    //
+    // Errors:
+    // * `FAILED_PRECONDITION`: An error occurred in retrieving the
+    //   configuration of the requested target, such as missing entries
+    //   (target-root, target file, target name), unparsable target file, or
+    //   requested target not being of "type" : "export".
+    // * `INTERNAL`: Internally, something is very broken.
+    auto ServeTargetVariables(
+        ::grpc::ServerContext* /*context*/,
+        const ::justbuild::just_serve::ServeTargetVariablesRequest* request,
+        ::justbuild::just_serve::ServeTargetVariablesResponse* response)
+        -> ::grpc::Status override;
+
+  private:
+    std::shared_ptr<Logger> logger_{std::make_shared<Logger>("target-service")};
+
+    // remote execution endpoint used for remote building
+    gsl::not_null<IExecutionApi::Ptr> const remote_api_{
+        CreateExecutionApi(RemoteExecutionConfig::RemoteAddress(),
+                           "serve-remote-execution")};
+    // used for storing and retrieving target-level cache entries
+    gsl::not_null<IExecutionApi::Ptr> const local_api_{
+        CreateExecutionApi(std::nullopt)};
+
+    /// \brief Get the blob content at given path inside a Git tree.
+    /// \returns If tree found, pair of "no-internal-errors" flag and content of
+    /// blob at the path specified if blob exists, nullopt otherwise.
+    [[nodiscard]] static auto GetBlobContent(
+        std::filesystem::path const& repo_path,
+        std::string const& tree_id,
+        std::string const& rel_path,
+        std::shared_ptr<Logger> const& logger)
+        -> std::optional<std::pair<bool, std::optional<std::string>>>;
+};
+
+#endif  // INCLUDED_SRC_BUILD_SERVE_API_SERVE_SERVICE_TARGET_HPP