diff --git a/pyproject.toml b/pyproject.toml
index a43df0c..8236d9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,6 +11,7 @@ keywords = ["metadata", "alkanes", "metabolomics"]
 python = "^3.11"
 pandas = "^2.2.2"
 pyxlsx = "^1.1.3"
+click = "^8.1.7"
 
 [tool.poetry.group.dev.dependencies]
 build = "^1.2.1"
@@ -128,4 +129,7 @@ filename = "pyproject.toml"
 filename = "CITATION.cff"
 
 [[tool.bumpversion.files]]
-filename = "docs/conf.py"        
\ No newline at end of file
+filename = "docs/conf.py"
+
+[tool.poetry.scripts]
+rcx_tk = "rcx_tk.__main__:main"
\ No newline at end of file
diff --git a/src/rcx_tk/__main__.py b/src/rcx_tk/__main__.py
new file mode 100644
index 0000000..dfbcc3f
--- /dev/null
+++ b/src/rcx_tk/__main__.py
@@ -0,0 +1,26 @@
+import click
+
+from rcx_tk.process_metadata_file import process_alkane_ri_file, process_metadata_file
+
+
+@click.command()
+@click.option('--method', type=click.Choice(['metadata', 'alkanes']), required = True, help = 'A file type to be processed, either metadata or alkanes file.')
+@click.argument('file_path')
+@click.argument('out_path')
+def main(method, file_path, out_path):
+    """Process metadata or alkane file.
+
+    Args:
+        file_path (path): A path to the input data.
+        out_path (path): A path where the processed data will be exported to.
+    """
+    if method == "metadata":
+        process_metadata_file(file_path, out_path)
+        click.echo("Metadata done!")
+    elif method == "alkanes":
+        process_alkane_ri_file(file_path, out_path)
+        click.echo("Alkanes done!")
+
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file