diff --git a/tools/build_api.py b/tools/build_api.py
index 31944e910f..30ede6c4e8 100644
--- a/tools/build_api.py
+++ b/tools/build_api.py
@@ -122,7 +122,7 @@ def add_result_to_report(report, result):
     result_wrap = {0: result}
     report[target][toolchain][id_name].append(result_wrap)
 
-def get_config(src_paths, target, toolchain_name, app_config=None):
+def get_config(src_paths, target, toolchain_name=None, app_config=None):
     """Get the configuration object for a target-toolchain combination
 
     Positional arguments:
@@ -134,16 +134,20 @@ def get_config(src_paths, target, toolchain_name, app_config=None):
     if not isinstance(src_paths, list):
         src_paths = [src_paths]
 
-    # Pass all params to the unified prepare_resources()
-    toolchain = prepare_toolchain(src_paths, None, target, toolchain_name,
-                                  app_config=app_config)
+    res = Resources(MockNotifier())
+    if toolchain_name:
+        toolchain = prepare_toolchain(src_paths, None, target, toolchain_name,
+                                      app_config=app_config)
+        config = toolchain.config
+        res.scan_with_toolchain(src_paths, toolchain, exclude=False)
+    else:
+        config = Config(target, src_paths, app_config=app_config)
+        res.scan_with_config(src_paths, config, exclude=False)
+    if config.has_regions:
+        _ = list(config.regions)
 
-    res = Resources(MockNotifier()).scan_with_toolchain(src_paths, toolchain, exclude=False)
-    if toolchain.config.has_regions:
-        _ = list(toolchain.config.regions)
-
-    cfg, macros = toolchain.config.get_config_data()
-    features = toolchain.config.get_features()
+    cfg, macros = config.get_config_data()
+    features = config.get_features()
     return cfg, macros, features
 
 def is_official_target(target_name, version):
diff --git a/tools/get_config.py b/tools/get_config.py
index 9a3bb0155b..1cc55c67ef 100644
--- a/tools/get_config.py
+++ b/tools/get_config.py
@@ -54,9 +54,7 @@ if __name__ == '__main__':
     target = extract_mcus(parser, options)[0]
 
     # Toolchain
-    if options.tool is None:
-        args_error(parser, "argument -t/--toolchain is required")
-    toolchain = options.tool[0]
+    toolchain = options.tool[0] if options.tool is not None else None
 
     options.prefix = options.prefix or [""]
 
diff --git a/tools/resources/__init__.py b/tools/resources/__init__.py
index b29a2aa1a9..33884509bc 100644
--- a/tools/resources/__init__.py
+++ b/tools/resources/__init__.py
@@ -373,6 +373,9 @@ class Resources(object):
         self.labels.setdefault(prefix, [])
         self.labels[prefix].extend(labels)
 
+    def add_target_labels(self, target):
+        self._add_labels("TARGET_", target.labels)
+
     def add_toolchain_labels(self, toolchain):
         for prefix, value in toolchain.get_labels().items():
             self._add_labels(prefix, value)
@@ -586,3 +589,15 @@ class Resources(object):
         toolchain.set_config_data(toolchain.config.get_config_data())
 
         return self
+
+    def scan_with_config(self, src_paths, config, exclude=True, base_path=None):
+        if config.target:
+            self.add_target_labels(config.target)
+        for path in src_paths:
+            if exists(path):
+                if exclude:
+                    self.add_directory(path, base_path, exclude_paths=[toolchain.build_dir])
+                else:
+                    self.add_directory(path, base_path)
+        config.load_resources(self)
+        return self
diff --git a/tools/test_api.py b/tools/test_api.py
index 123c07daab..e2f6bfa255 100644
--- a/tools/test_api.py
+++ b/tools/test_api.py
@@ -2228,7 +2228,7 @@ def build_tests(tests, base_source_paths, build_path, target, toolchain_name,
     else:
         target_name = target
         target = TARGET_MAP[target_name]
-    cfg, _, _ = get_config(base_source_paths, target_name, toolchain_name, app_config=app_config)
+    cfg, _, _ = get_config(base_source_paths, target, app_config=app_config)
 
     baud_rate = 9600
     if 'platform.stdio-baud-rate' in cfg: