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Flask-RESTX is a community driven fork of


Flask-RESTX is an extension for

_ that adds support for quickly building REST APIs. Flask-RESTX encourages best practices with minimal setup. If you are familiar with Flask, Flask-RESTX should be easy to pick up. It provides a coherent collection of decorators and tools to describe your API and expose its documentation properly using


Flask-RESTX requires Python 2.7 or 3.4+.

On Flask Compatibility

Flask and Werkzeug moved to versions 2.0 in March 2020. This caused a breaking change in Flask-RESTX.

.. list-table:: RESTX and Flask / Werkzeug Compatibility :widths: 25 25 25 :header-rows: 1

* - Flask-RESTX version
  - Flask version
  - Note
* - <= 0.3.0
  - < 2.0.0
  - unpinned in Flask-RESTX. Pin your projects!
* - == 0.4.0
  - < 2.0.0
  - pinned in Flask-RESTX.
* - >= 0.5.0
  - All (For Now)
  - unpinned, import statements wrapped for compatibility
* - trunk branch in Github
  - All (and updated more often)
  - unpinned, will address issues faster than releases.


You can install Flask-RESTX with pip:

.. code-block:: console

$ pip install flask-restx

or with easy_install:

.. code-block:: console

$ easy_install flask-restx

Quick start

With Flask-RESTX, you only import the api instance to route and document your endpoints.

.. code-block:: python

from flask import Flask
from flask_restx import Api, Resource, fields

app = Flask(name) api = Api(app, version='1.0', title='TodoMVC API', description='A simple TodoMVC API', )

ns = api.namespace('todos', description='TODO operations')

todo = api.model('Todo', { 'id': fields.Integer(readonly=True, description='The task unique identifier'), 'task': fields.String(required=True, description='The task details') })

class TodoDAO(object): def init(self): self.counter = 0 self.todos = []

def get(self, id):
    for todo in self.todos:
        if todo['id'] == id:
            return todo
    api.abort(404, "Todo {} doesn't exist".format(id))

def create(self, data):
    todo = data
    todo['id'] = self.counter = self.counter + 1
    return todo

def update(self, id, data):
    todo = self.get(id)
    return todo

def delete(self, id):
    todo = self.get(id)

DAO = TodoDAO() DAO.create({'task': 'Build an API'}) DAO.create({'task': '?????'}) DAO.create({'task': 'profit!'})

@ns.route('/') class TodoList(Resource): '''Shows a list of all todos, and lets you POST to add new tasks''' @ns.doc('list_todos') @ns.marshal_list_with(todo) def get(self): '''List all tasks''' return DAO.todos

@ns.marshal_with(todo, code=201)
def post(self):
    '''Create a new task'''
    return DAO.create(api.payload), 201

@ns.route('/') @ns.response(404, 'Todo not found') @ns.param('id', 'The task identifier') class Todo(Resource): '''Show a single todo item and lets you delete them''' @ns.doc('get_todo') @ns.marshal_with(todo) def get(self, id): '''Fetch a given resource''' return DAO.get(id)

@ns.response(204, 'Todo deleted')
def delete(self, id):
    '''Delete a task given its identifier'''
    return '', 204

def put(self, id):
    '''Update a task given its identifier'''
    return DAO.update(id, api.payload)

if name == 'main':


Flask-RESTX is brought to you by @python-restx. Since early 2019 @SteadBytes, @a-luna, @j5awry, @ziirish volunteered to help @python-restx keep the project up and running. Of course everyone is welcome to contribute and we will be happy to review your PR's or answer to your issues.


The documentation is hosted

on Read the Docs 

.. _Flask: .. _Swagger:


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