diff --git a/generate_http_api_data.py b/generate_http_api_data.py
new file mode 100755
index 00000000..86c09323
--- /dev/null
+++ b/generate_http_api_data.py
@@ -0,0 +1,52 @@
+#! /usr/bin/env python3
+"""Generate data about the HTTP API."""
+
+import json
+import os
+from unittest import mock
+
+from fastapi.testclient import TestClient
+
+import labthings_fastapi as lt
+
+ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
+def mock_picamera2_import() -> None:
+    """Mock the picamera2 library so that the full config can be loaded."""
+    dummy_cam = mock.Mock()
+    mock_picamera2 = mock.MagicMock()
+    mock_picamera2.return_value.__enter__.return_value = dummy_cam
+    mock_picamera2.return_value.__exit__.return_value = None
+    mock.patch.dict(
+        "sys.modules",
+        {
+            "picamera2": mock_picamera2,
+            "picamera2.encoders": mock.Mock(),
+            "picamera2.outputs": mock.Mock(),
+        },
+    ).start()
+
+
+def main() -> None:
+    """Generate openapi description and Thing descriptions."""
+    mock_picamera2_import()
+    config = os.path.join(ROOT_DIR, "ofm_config_full.json")
+
+    with open(config, "r", encoding="utf-8") as file_obj:
+        config_dict = json.load(file_obj)
+
+    config_dict["things"]["smart_scan"]["kwargs"]["scans_folder"] = "/tmp/scans"
+
+    server = lt.ThingServer(things=config_dict["things"])
+    test_client = TestClient(server.app)
+    td_response = test_client.get("/thing_descriptions/")
+    with open("apidocs/http/thing_descriptions.json", mode="w") as file_obj:
+        json.dump(td_response.json(), file_obj, indent=4)
+    openapi_response = test_client.get("/openapi.json")
+    with open("apidocs/http/openapi.json", mode="w") as f:
+        json.dump(openapi_response.json(), f, indent=4)
+
+
+if __name__ == "__main__":
+    main()