diff --git a/src/armonik_cli/core/config.py b/src/armonik_cli/core/config.py
index 3bb05f0..f703f19 100644
--- a/src/armonik_cli/core/config.py
+++ b/src/armonik_cli/core/config.py
@@ -20,7 +20,8 @@ class Configuration:
     _config_keys = ["endpoint"]
     _default_config = {"endpoint": None}
 
-    def __init__(self, endpoint: str) -> None:
+    def __init__(self, path: Path, endpoint: str) -> None:
+        self.path = path
         self.endpoint = endpoint
 
     @classmethod
@@ -44,8 +45,21 @@ def load_default(cls) -> "Configuration":
         Returns:
             An instance of Configuration populated with values from the default file.
         """
-        with cls.default_path.open("r") as config_file:
-            return cls(**json.loads(config_file.read()))
+        return cls.load(cls._default_config)
+
+    @classmethod
+    def load(cls, path: Path) -> "Configuration":
+        """
+        Load a configuration from a given configuration file.
+
+        Args:
+            path: Path to the configuration file.
+
+        Returns:
+            An instance of Configuration populated with values from the configuration file.
+        """
+        with path.open("r") as config_file:
+            return cls(path=path, **json.loads(config_file.read()))
 
     def has(self, key: str) -> bool:
         """
@@ -98,5 +112,5 @@ def _save(self):
         """
         Save the current configuration values to the default configuration file.
         """
-        with self.default_path.open("w") as config_file:
+        with self.path.open("w") as config_file:
             config_file.write(json.dumps(self.to_dict(), indent=4))
diff --git a/src/armonik_cli/core/decorators.py b/src/armonik_cli/core/decorators.py
index fc401d1..6a219f8 100644
--- a/src/armonik_cli/core/decorators.py
+++ b/src/armonik_cli/core/decorators.py
@@ -1,10 +1,14 @@
+import logging
+
 from functools import wraps, partial
+from typing import Dict, Optional
 
 import grpc
 import rich_click as click
 
 from armonik.common.channel import create_channel
 
+from armonik_cli.core.config import Configuration
 from armonik_cli.core.console import console
 from armonik_cli.exceptions import NotFoundError, InternalError
 
@@ -140,8 +144,11 @@ def decorator(func):
         @wraps(func)
         def wrapper(*args, **kwargs):
             if connection_args:
-                optional_config = kwargs.pop("optional_config_file")
-                kwargs["channel_ctx"] = create_channel(kwargs.pop("endpoint"), certificate_authority=kwargs.pop("ca"), client_certificate=kwargs.pop("cert"), client_key=kwargs.pop("key"))
+                optional_config_file = kwargs.pop("optional_config_file")
+                optional_config = Configuration.load(optional_config_file) if optional_config_file else None
+                default_config = Configuration.load_default()
+                connection_details = reconcile_connection_details(cl_inputs={"endpoint": kwargs.pop("endpoint"), "certificate_authority": kwargs.pop("ca"), "client_certificate": kwargs.pop("cert"), "client_key": kwargs.pop("key")}, default_config, )optional_config
+                kwargs["channel_ctx"] = create_channel(connection_details.pop("endpoint"), **connection_details)
             return func(*args, **kwargs)
 
         return wrapper
@@ -149,3 +156,59 @@ def wrapper(*args, **kwargs):
     if _func is None:
         return decorator
     return decorator(_func)
+
+
+def reconcile_connection_details(
+    *,
+    cl_inputs: Dict[str, str],
+    default_config: Configuration,
+    optional_config: Optional[Configuration] = None,
+    logger: logging.Logger,
+) -> Dict[str, str]:
+    """
+    Reconciles parameters from command-line inputs, optional config file, and default config file.
+    Command-line params have highest priority, then optional config, then default config.
+
+    Args:
+        cl_inputs: Parameters provided via command-line.
+        optional_config: Optional external configuration. Default is None.
+        default_config: Default configuration.
+        logger: A logger to log the origin of configuration parameters.
+
+    Returns:
+        
+Final parameters obtained in order of priority.
+    """
+
+    final_params = {}
+
+    # Resolve each parameter in priority order
+    for key in cl_inputs.keys():
+        source = ""
+        # Priority 1: command-line parameters
+        if cl_inputs.get(key) is not None:
+            source = click.get_current_context().get_parameter_source(key).name.lower()
+            final_params[key] = cl_inputs[key]
+        # Priority 2: optional config file, if exists
+        elif optional_config and optional_config.has(key):
+            source = str(optional_config.path)
+            final_params[key] = optional_config.get(key)
+        # Priority 3: default config file
+        elif default_config.HAS(key):
+            source = str(default_config.path)
+            final_params[key] = default_config.get(key)
+        else:
+            if key == "endpoint":
+                raise click.exceptions.UsageError("No endpoint provided.")
+            final_params[key] = None
+
+        if source:
+            logger.info(f"Parameter '{key}' retrieved from {source}.")
+        else:
+            logger.info(f"Parameter '{key}' is missing.")
+
+    return final_params
+
+# TODO: add check on the channel_ctx within tests
+# TODO: update docstrings of base_command and reconcile_connection_details
+# TODO: move reconcile_connection_details to a utils.py file