diff --git a/apps/backend/.gitignore b/apps/backend/.gitignore
new file mode 100644
index 0000000..2bac744
--- /dev/null
+++ b/apps/backend/.gitignore
@@ -0,0 +1 @@
+openapi.json
\ No newline at end of file
diff --git a/apps/backend/export_openapi.py b/apps/backend/export_openapi.py
new file mode 100644
index 0000000..e8c1842
--- /dev/null
+++ b/apps/backend/export_openapi.py
@@ -0,0 +1,28 @@
+"""Export the FastAPI OpenAPI spec to a JSON file."""
+
+import argparse
+import json
+import sys
+
+from main import app
+
+
+def export_openapi(output: str | None = None) -> None:
+    spec = app.openapi()
+    text = json.dumps(spec, indent=2)
+
+    if output:
+        with open(output, "w") as f:
+            f.write(text)
+    else:
+        sys.stdout.write(text)
+        sys.stdout.write("\n")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Export FastAPI OpenAPI spec")
+    parser.add_argument(
+        "-o", "--output", help="Output file path (default: stdout)", default=None
+    )
+    args = parser.parse_args()
+    export_openapi(args.output)
diff --git a/apps/backend/pyproject.toml b/apps/backend/pyproject.toml
index eb829b9..05d94fe 100644
--- a/apps/backend/pyproject.toml
+++ b/apps/backend/pyproject.toml
@@ -9,6 +9,9 @@ dependencies = [
     "shared"
 ]
 
+[tool.setuptools]
+py-modules = ["main", "export_openapi"]
+
 [dependency-groups]
 test = [
     "pytest>=9.0.3",
@@ -37,6 +40,7 @@ lint = "uv run ruff check ."
 typecheck = "uv run mypy ."
 test = "uv run pytest tests"
 format = "uv run ruff format ."
+export-openapi = "uv run python export_openapi.py -o openapi.json"
 
 [tool.poe.tasks.start]
 help = "Build mypyc extensions and start FastAPI in production mode"