diff --git a/pyproject.toml b/pyproject.toml
index b450781..8eeadcd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,10 @@ classifiers = [
     "Typing :: Typed",
 ]
 # add your package dependencies here
-dependencies = []
+dependencies = [
+    "numpy",
+    "typer",
+]
 
 # https://peps.python.org/pep-0621/#dependencies-optional-dependencies
 # "extras" (e.g. for `pip install .[test]`)
@@ -59,8 +62,8 @@ repository = "https://github.com/teamtomo/ttmask"
 # Entry points
 # https://peps.python.org/pep-0621/#entry-points
 # same as console_scripts entry point
-# [project.scripts]
-# ttmask-cli = "ttmask:main_cli"
+[project.scripts]
+ttmask = "ttmask:cli"
 
 # [project.entry-points."some.group"]
 # tomatoes = "ttmask:main_tomatoes"
diff --git a/src/ttmask/__init__.py b/src/ttmask/__init__.py
index 6ee4d29..1128bf4 100644
--- a/src/ttmask/__init__.py
+++ b/src/ttmask/__init__.py
@@ -8,3 +8,7 @@
     __version__ = "uninstalled"
 __author__ = "Miles Graham"
 __email__ = "miles.graham@balliol.ox.ac.uk"
+
+from ._cli import cli
+from .sphere import sphere
+
diff --git a/src/ttmask/_cli.py b/src/ttmask/_cli.py
new file mode 100644
index 0000000..841068e
--- /dev/null
+++ b/src/ttmask/_cli.py
@@ -0,0 +1,3 @@
+import typer
+
+cli = typer.Typer(name="ttmask")
diff --git a/src/ttmask/sphere.py b/src/ttmask/sphere.py
new file mode 100644
index 0000000..550a314
--- /dev/null
+++ b/src/ttmask/sphere.py
@@ -0,0 +1,6 @@
+from ._cli import cli
+
+
+@cli.command(name='test1')
+def sphere(name: str, number: int):
+    print('bla')