diff --git a/news/add-cli.rst b/news/add-cli.rst
new file mode 100644
index 0000000..08e9cbd
--- /dev/null
+++ b/news/add-cli.rst
@@ -0,0 +1,23 @@
+**Added:**
+
+* Add CLI interface to run DSL input file
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>
diff --git a/pyproject.toml b/pyproject.toml
index c829688..4e1e5b7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,7 +49,7 @@ exclude = []  # exclude packages matching these glob patterns (empty by default)
 namespaces = false  # to disable scanning PEP 420 namespaces (true by default)
 
 [project.scripts]
-pdfbl-sequential = "pdfbl.sequential.pdfbl_sequential_app:main"
+pdfbl = "pdfbl.sequential.pdfbl_sequential_app:main"
 
 [tool.setuptools.dynamic]
 dependencies = {file = ["requirements/pip.txt"]}
diff --git a/src/pdfbl/sequential/diffpy_interpreter.py b/src/pdfbl/sequential/diffpy_interpreter.py
index ddf25aa..934506d 100644
--- a/src/pdfbl/sequential/diffpy_interpreter.py
+++ b/src/pdfbl/sequential/diffpy_interpreter.py
@@ -1,3 +1,4 @@
+import json
 from pathlib import Path
 
 import yaml
@@ -13,7 +14,7 @@
 ;
 
 Command:
-    LoadCommand | SetCommand | CreateCommand
+    LoadCommand | SetCommand | CreateCommand | SaveCommand
 ;
 
 LoadCommand:
@@ -29,6 +30,10 @@
     'create' 'equation' 'variables' value+=Value[eolterm]
 ;
 
+SaveCommand:
+    'save' 'to' source=STRING
+;
+
 VariableBlock:
     'variables:' '---' content=/[\s\S]*?(?=---)/ '---'
 ;
@@ -53,6 +58,7 @@ def __init__(self):
                 "LoadCommand": self.load_command_processor,
                 "VariableBlock": self.variable_block_processor,
                 "CreateCommand": self.create_command_processor,
+                "SaveCommand": self.save_command_processor,
             }
         )
         self.inputs = {}
@@ -136,6 +142,9 @@ def create_command_processor(self, command):
             v for v in command.value if isinstance(v, str)
         ]
 
+    def save_command_processor(self, command):
+        self.inputs["result_path"] = command.source
+
     def configure_adapter(self):
         self.pdfadapter.initialize_profile(
             self.inputs["profile_path"], **self.inputs["profiles_config"]
@@ -170,8 +179,23 @@ def run(self):
             least_squares(
                 self.pdfadapter.recipe.residual, self.pdfadapter.recipe.values
             )
+        if "result_path" in self.inputs:
+            with open(self.inputs["result_path"], "w") as f:
+                json.dump(self.pdfadapter.get_results(), f, indent=4)
         return self.pdfadapter.get_results()
 
+    def run_app(self, args):
+        dpin_path = Path(args.input_file)
+        if not dpin_path.exists():
+            raise FileNotFoundError(
+                f"{str(dpin_path)} not found. Please check if this file "
+                "exists and provide the correct path to it."
+            )
+        dsl_code = dpin_path.read_text()
+        self.interpret(dsl_code)
+        self.configure_adapter()
+        self.run()
+
 
 if __name__ == "__main__":
     interpreter = DiffpyInterpreter()
@@ -184,13 +208,14 @@ def run(self):
 set exp_ni calculation_range as 1.5 50 0.01
 create equation variables s0
 set equation as "s0*G1"
+save to "results.json"
 
 variables:
 ---
-- G1_a: 3.52
+- G1.a: 3.52
 - s0: 0.4
-- G1_Uiso_0: 0.005
-- G1_delta2: 2
+- G1.Uiso_0: 0.005
+- G1.delta2: 2
 - qdamp: 0.04
 - qbroad: 0.02
 ---
diff --git a/src/pdfbl/sequential/pdfbl_sequential_app.py b/src/pdfbl/sequential/pdfbl_sequential_app.py
index 677d861..963ffbc 100644
--- a/src/pdfbl/sequential/pdfbl_sequential_app.py
+++ b/src/pdfbl/sequential/pdfbl_sequential_app.py
@@ -1,6 +1,7 @@
 import argparse
 
 from pdfbl.sequential import __version__
+from pdfbl.sequential.diffpy_interpreter import DiffpyInterpreter
 
 
 def main():
@@ -8,7 +9,8 @@ def main():
 
     Examples
     --------
-    >>> pdfbl-cli --version
+    >>> pdfbl --version
+    >>> pdfbl run input.dp-in
     """
     parser = argparse.ArgumentParser(
         description=(
@@ -19,7 +21,16 @@ def main():
     parser.add_argument(
         "--version",
         action="version",
-        version=f"pdfbl.sequential {__version__}",
-        help="Show the version of pdfbl.sequential and exit.",
+        version=f"pdfbl {__version__}",
+        help="Show the version of pdfbl and exit.",
     )
-    parser.parse_args()
+    subparsers = parser.add_subparsers(dest="subcommand")
+    run_parser = subparsers.add_parser("run")
+    run_parser.add_argument("input_file", help="Input .dp-in file.")
+    run_parser.set_defaults(func=DiffpyInterpreter().run_app)
+    args = parser.parse_args()
+    if hasattr(args, "func"):
+        args.func(args)
+    else:
+        parser.print_help()
+        parser.exit()