diff --git a/docs/api/index.rst b/docs/api/index.rst
new file mode 100644
index 00000000..f70b04bc
--- /dev/null
+++ b/docs/api/index.rst
@@ -0,0 +1,9 @@
+API Reference
+=============
+
+Documentation with information of functions, classes or methods and all other parts of the OpenAPI-core public API.
+
+.. toctree::
+    :maxdepth: 1
+
+    openapi
diff --git a/docs/api/openapi.rst b/docs/api/openapi.rst
new file mode 100644
index 00000000..2ed3cd43
--- /dev/null
+++ b/docs/api/openapi.rst
@@ -0,0 +1,5 @@
+`OpenAPI` class
+===============
+
+.. autoclass:: openapi_core.OpenAPI
+    :members:
diff --git a/docs/index.rst b/docs/index.rst
index 24eacced..b23e8d0a 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -11,6 +11,7 @@ openapi-core
     customizations/index
     security
     extensions
+    api/index
     contributing
 
 Openapi-core is a Python library that adds client-side and server-side support