diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
new file mode 100644
index 0000000..9d2259a
--- /dev/null
+++ b/api-ref/source/conf.py
@@ -0,0 +1,232 @@
+# -*- coding: utf-8 -*-
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# nova documentation build configuration file, created by
+# sphinx-quickstart on Sat May  1 15:17:47 2010.
+#
+# This file is execfile()d with the current directory set to
+# its containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import os
+import subprocess
+import sys
+
+import openstackdocstheme
+
+html_theme = 'openstackdocs'
+html_theme_path = [openstackdocstheme.get_html_theme_path()]
+html_theme_options = {
+    "sidebar_mode": "toc",
+}
+
+extensions = [
+    'os_api_ref',
+]
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+sys.path.insert(0, os.path.abspath('../../'))
+sys.path.insert(0, os.path.abspath('../'))
+sys.path.insert(0, os.path.abspath('./'))
+
+# -- General configuration ----------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+
+# The encoding of source files.
+#
+# source_encoding = 'utf-8'
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = u'Billing Service API Reference'
+copyright = u'2010-present, OpenStack Foundation'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+from distil.version import version_info
+# The full version, including alpha/beta/rc tags.
+release = version_info.release_string()
+# The short X.Y version.
+version = version_info.version_string()
+
+# Config logABug feature
+giturl = u'http://git.openstack.org/cgit/openstack/distil/tree/api-ref/source'
+# source tree
+# html_context allows us to pass arbitrary values into the html template
+html_context = {'bug_tag': 'api-ref',
+                'giturl': giturl,
+                'bug_project': 'distil'}
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+# today = ''
+# Else, today_fmt is used as the format for a strftime call.
+# today_fmt = '%B %d, %Y'
+
+# The reST default role (used for this markup: `text`) to use
+# for all documents.
+# default_role = None
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+# add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+add_module_names = False
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+# -- Options for man page output ----------------------------------------------
+
+# Grouping the document tree for man pages.
+# List of tuples 'sourcefile', 'target', u'title', u'Authors name', 'manual'
+
+
+# -- Options for HTML output --------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages. Major themes that come with
+# Sphinx are currently 'default' and 'sphinxdoc'.
+# html_theme_path = ["."]
+# html_theme = '_theme'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further. For a list of options available for each theme, see the
+# documentation.
+# html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+# html_theme_path = []
+
+# The name for this set of Sphinx documents. If None, it defaults to
+# "<project> v<release> documentation".
+# html_title = None
+
+# A shorter title for the navigation bar. Default is the same as html_title.
+# html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+# html_logo = None
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs. This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+# html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+# html_static_path = ['_static']
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+# html_last_updated_fmt = '%b %d, %Y'
+git_cmd = ["git", "log", "--pretty=format:'%ad, commit %h'", "--date=local",
+           "-n1"]
+html_last_updated_fmt = subprocess.Popen(
+    git_cmd, stdout=subprocess.PIPE).communicate()[0]
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+# html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+# html_sidebars = {}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+# html_additional_pages = {}
+
+# If false, no module index is generated.
+# html_use_modindex = True
+
+# If false, no index is generated.
+# html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+# html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+# html_show_sourcelink = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it. The value of this option must be the
+# base URL from which the finished HTML is served.
+# html_use_opensearch = ''
+
+# If nonempty, this is the file name suffix for HTML files (e.g. ".xhtml").
+# html_file_suffix = ''
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'distildoc'
+
+
+# -- Options for LaTeX output -------------------------------------------------
+
+# The paper size ('letter' or 'a4').
+# latex_paper_size = 'letter'
+
+# The font size ('10pt', '11pt' or '12pt').
+# latex_font_size = '10pt'
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title, author, documentclass
+# [howto/manual]).
+latex_documents = [
+    ('index', 'Distil.tex', u'OpenStack Billing Service API Documentation',
+     u'OpenStack Foundation', 'manual'),
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+# latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+# latex_use_parts = False
+
+# Additional stuff for the LaTeX preamble.
+# latex_preamble = ''
+
+# Documents to append as an appendix to all manuals.
+# latex_appendices = []
+
+# If false, no module index is generated.
+# latex_use_modindex = True
diff --git a/api-ref/source/index.rst b/api-ref/source/index.rst
new file mode 100644
index 0000000..ac94d5c
--- /dev/null
+++ b/api-ref/source/index.rst
@@ -0,0 +1,22 @@
+..
+      Licensed under the Apache License, Version 2.0 (the "License"); you may
+      not use this file except in compliance with the License. You may obtain
+      a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+      Unless required by applicable law or agreed to in writing, software
+      distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+      WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+      License for the specific language governing permissions and limitations
+      under the License.
+
+:tocdepth: 2
+
+================================
+Billing Service API v2 (CURRENT)
+================================
+
+.. rest_expand_all::
+
+.. include:: products.inc
diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
new file mode 100644
index 0000000..d35a2ef
--- /dev/null
+++ b/api-ref/source/parameters.yaml
@@ -0,0 +1,8 @@
+# variables in path
+regions:
+  description: |
+    The regions list to request products. Separated with comma, for example:
+    /v2/products?regions=region1,regions2
+  in: path
+  required: false
+  type: string
diff --git a/api-ref/source/products.inc b/api-ref/source/products.inc
new file mode 100644
index 0000000..e832dec
--- /dev/null
+++ b/api-ref/source/products.inc
@@ -0,0 +1,34 @@
+===================
+Products (products)
+===================
+Product is the resource cloud provider can charge the tenant users.
+
+List products
+=============
+
+.. rest_method:: GET /v2/products
+
+Lists products.
+
+This operation lists products and the price, unit information of each product.
+
+Normal response codes: 200
+
+Error response codes:
+
+- BadRequest (400)
+- ServiceUnavailable (503)
+
+Request Parameters
+------------------
+
+.. rest_parameters:: parameters.yaml
+
+   - regions: regions
+
+   
+Response Example
+----------------
+
+.. literalinclude:: samples/get-products-response.json
+   :language: javascript
\ No newline at end of file
diff --git a/api-ref/source/samples/get-products-response.json b/api-ref/source/samples/get-products-response.json
new file mode 100644
index 0000000..466240a
--- /dev/null
+++ b/api-ref/source/samples/get-products-response.json
@@ -0,0 +1,56 @@
+{
+    "products": {
+        "nz-por-1": {
+            "compute": [
+                {
+                    "price": 0.711,
+                    "resource": "c1.c16r16",
+                    "description": "16 vCPU, 16 GB RAM",
+                    "unit": "hour"
+                },
+            ],
+            "network": [
+                {
+                    "price": 0.006,
+                    "resource": "n1.ipv4",
+                    "description": "Floating public IP (IPv4)",
+                    "unit": "hour"
+                },
+            ],
+            "block storage": [
+                {
+                    "price": 0.0005,
+                    "resource": "b1.standard",
+                    "description": "Standard tier",
+                    "unit": "gigabyte"
+                }
+            ]
+        },
+        "nz-hlz-1": {
+            "compute": [
+                {
+                    "price": 0.711,
+                    "resource": "c1.c16r16",
+                    "description": "16 vCPU, 16 GB RAM",
+                    "unit": "hour"
+                },
+            ],
+            "network": [
+                {
+                    "price": 0.006,
+                    "resource": "n1.ipv4",
+                    "description": "Floating public IP (IPv4)",
+                    "unit": "hour"
+                },
+            ],
+            "block storage": [
+                {
+                    "price": 0.0005,
+                    "resource": "b1.standard",
+                    "description": "Standard tier",
+                    "unit": "gigabyte"
+                }
+            ]
+        }
+    }
+}
diff --git a/requirements.txt b/requirements.txt
index d9ffbc6..ec30c5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 # requirements.
 
 Babel>=2.3.4,!=2.4.0  # BSD
-Flask<1.0,>=0.10 # BSD
+Flask>=0.10,!=0.11,<1.0 # BSD
 pbr>=1.6 # Apache-2.0
 six>=1.9.0 # MIT
 odoorpc==0.4.2
diff --git a/test-requirements.txt b/test-requirements.txt
index 1fcb54d..3e415f5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,6 @@
 hacking>=0.12.0,!=0.13.0,<0.14 # Apache-2.0
 coverage>=4.0,!=4.4 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
-oslotest>=1.10.0 # Apache-2.0
 pylint==1.4.5 # GPLv2
 sqlalchemy-migrate>=0.11.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
@@ -13,4 +12,7 @@ Flask>=0.10,!=0.11,<1.0 # BSD
 
 sphinx>=1.6.2 # BSD
 sphinxcontrib-httpdomain
-openstackdocstheme>=1.11.0 # Apache-2.0
\ No newline at end of file
+openstackdocstheme>=1.17.0 # Apache-2.0
+oslosphinx>=4.7.0 # Apache-2.0
+oslotest>=1.10.0 # Apache-2.0
+os-api-ref>=1.4.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 1fa04a8..a65a9a6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -35,10 +35,17 @@ commands = {posargs}
 
 [testenv:docs]
 commands =
-    rm -rf doc/html doc/build
-    rm -rf doc/source/apidoc doc/source/api
     python setup.py build_sphinx
 
+[testenv:api-ref]
+# This environment is called from CI scripts to test and publish
+# the API Ref to developer.openstack.org.
+#
+whitelist_externals = bash
+                      rm
+commands =
+  rm -rf api-ref/build
+  sphinx-build -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html
 [testenv:pylint]
 setenv = VIRTUAL_ENV={envdir}
 commands = bash tools/lintstack.sh