diff --git a/configuration/mconfigs.py b/configuration/mconfigs.py
new file mode 100644
index 0000000..88862b5
--- /dev/null
+++ b/configuration/mconfigs.py
@@ -0,0 +1,65 @@
+"""
+Copyright 2020 The Magma Authors.
+
+This source code is licensed under the BSD-style license found in the
+LICENSE file in the root directory of this source tree.
+
+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.
+"""
+
+from typing import Any as TAny
+from typing import Dict
+
+from google.protobuf.internal.well_known_types import Any
+from configuration import service_configs
+from configuration.exceptions import LoadConfigError
+
+
+def filter_configs_by_key(configs_by_key: Dict[str, TAny]) -> Dict[str, TAny]:
+    """
+    Given a JSON-deserialized map of mconfig protobuf Any's keyed by service
+    name, filter out any entires without a corresponding service or which have
+    values that aren't registered in the protobuf symbol database yet.
+
+    Args:
+        configs_by_key:
+            JSON-deserialized service mconfigs keyed by service name
+
+    Returns:
+        The input map without any services which currently don't exist.
+    """
+    magmad_cfg = service_configs.load_service_config('magmad')
+    services = magmad_cfg.get('magma_services', [])
+    services.append('magmad')
+    services += magmad_cfg.get('registered_dynamic_services', [])
+    services = set(services)
+
+    filtered_configs_by_key = {}
+    for srv, cfg in configs_by_key.items():
+        if srv not in services:
+            continue
+        filtered_configs_by_key[srv] = cfg
+    return filtered_configs_by_key
+
+
+def unpack_mconfig_any(mconfig_any: Any, mconfig_struct: TAny) -> TAny:
+    """
+    Unpack a protobuf Any type into a given an empty protobuf message struct
+    for a service.
+
+    Args:
+        mconfig_any: protobuf Any type to unpack
+        mconfig_struct: protobuf message struct
+
+    Returns: Concrete protobuf object that the provided Any wraps
+    """
+    unpacked = mconfig_any.Unpack(mconfig_struct)
+    if not unpacked:
+        raise LoadConfigError(
+            'Cannot unpack Any type into message: %s' % mconfig_struct,
+        )
+    return mconfig_struct