diff --git a/app/services/__init__.py b/app/conf/__init__.py
similarity index 100%
rename from app/services/__init__.py
rename to app/conf/__init__.py
diff --git a/app/conf/schema.py b/app/conf/schema.py
new file mode 100644
index 0000000..f76d18a
--- /dev/null
+++ b/app/conf/schema.py
@@ -0,0 +1,147 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Created with https://app.quicktype.io
+#   name: stacosys
+
+json_schema = """
+{
+    "$ref": "#/definitions/Stacosys",
+    "definitions": {
+        "Stacosys": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+                "general": {
+                    "$ref": "#/definitions/General"
+                },
+                "http": {
+                    "$ref": "#/definitions/HTTP"
+                },
+                "security": {
+                    "$ref": "#/definitions/Security"
+                },
+                "rss": {
+                    "$ref": "#/definitions/RSS"
+                },
+                "zmq": {
+                    "$ref": "#/definitions/Zmq"
+                }
+            },
+            "required": [
+                "general",
+                "http",
+                "rss",
+                "security",
+                "zmq"
+            ],
+            "title": "stacosys"
+        },
+        "General": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+                "debug": {
+                    "type": "boolean"
+                },
+                "lang": {
+                    "type": "string"
+                },
+                "db_url": {
+                    "type": "string"
+                }
+            },
+            "required": [
+                "db_url",
+                "debug",
+                "lang"
+            ],
+            "title": "general"
+        },
+        "HTTP": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+                "root_url": {
+                    "type": "string"
+                },
+                "host": {
+                    "type": "string"
+                },
+                "port": {
+                    "type": "integer"
+                }
+            },
+            "required": [
+                "host",
+                "port",
+                "root_url"
+            ],
+            "title": "http"
+        },
+        "RSS": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+                "proto": {
+                    "type": "string"
+                },
+                "file": {
+                    "type": "string"
+                }
+            },
+            "required": [
+                "file",
+                "proto"
+            ],
+            "title": "rss"
+        },
+        "Security": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+                "salt": {
+                    "type": "string"
+                },
+                "secret": {
+                    "type": "string"
+                },
+                "private": {
+                    "type": "boolean"
+                }
+            },
+            "required": [
+                "private",
+                "salt",
+                "secret"
+            ],
+            "title": "security"
+        },
+        "Zmq": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+                "active": {
+                    "type": "boolean"
+                },
+                "host": {
+                    "type": "string"
+                },
+                "pub_port": {
+                    "type": "integer"
+                },
+                "sub_port": {
+                    "type": "integer"
+                }
+            },
+            "required": [
+                "active",
+                "host",
+                "pub_port",
+                "sub_port"
+            ],
+            "title": "zmq"
+        }
+    }
+}
+"""
\ No newline at end of file
diff --git a/app/run.py b/app/core/__init__.py
similarity index 71%
rename from app/run.py
rename to app/core/__init__.py
index 746596f..a85d304 100644
--- a/app/run.py
+++ b/app/core/__init__.py
@@ -4,7 +4,12 @@
 import os
 import sys
 import logging
+from flask import Flask
 from flask.ext.cors import CORS
+from conf import config
+from jsonschema import validate
+
+app = Flask(__name__)
 
 # add current path and parent path to syspath
 current_path = os.path.dirname(__file__)
@@ -15,16 +20,12 @@ for path in paths:
         sys.path.insert(0, path)
 
 # more imports
-import config
-from app.services import database
-from app.services import processor
-from app.interface import api
-from app.interface import form
-from app.interface import report
-#from app.controllers import mail
-from app.interface import zclient
-from app import app
-
+import database
+import processor
+from interface import api
+from interface import form
+from interface import report
+from interface import zclient
 
 # configure logging
 def configure_logging(level):
@@ -40,7 +41,7 @@ def configure_logging(level):
     # add ch to logger
     root_logger.addHandler(ch)
 
-logging_level = (20, 10)[config.DEBUG]
+logging_level = (20, 10)[config.general['debug']]
 configure_logging(logging_level)
 
 logger = logging.getLogger(__name__)
@@ -52,25 +53,23 @@ database.setup()
 zclient.start()
 
 # start processor
-template_path = os.path.abspath(os.path.join(current_path, 'templates'))
+template_path = os.path.abspath(os.path.join(current_path, '../templates'))
 processor.start(template_path)
 
 # less feature in private mode
-if not config.PRIVATE:
+if not config.security['private']:
     # enable CORS
     cors = CORS(app, resources={r"/comments/*": {"origins": "*"}})
     from app.controllers import reader
     logger.debug('imported: %s ' % reader.__name__)
 
 # tune logging level
-if not config.DEBUG:
+if not config.general['debug']:
     logging.getLogger('app.cors').level = logging.WARNING
     logging.getLogger('werkzeug').level = logging.WARNING
 
 logger.info("Start Stacosys application")
 
-if __name__ == '__main__':
-
-    app.run(host=config.HTTP_ADDRESS,
-            port=config.HTTP_PORT,
-            debug=config.DEBUG, use_reloader=False)
+app.run(host=config.http['host'],
+        port=config.http['port'],
+        debug=config.general['debug'], use_reloader=False)
\ No newline at end of file
diff --git a/app/services/database.py b/app/core/database.py
similarity index 63%
rename from app/services/database.py
rename to app/core/database.py
index 0075e13..7f96f5d 100644
--- a/app/services/database.py
+++ b/app/core/database.py
@@ -1,13 +1,13 @@
 #!/usr/bin/python
 # -*- coding: UTF-8 -*-
 
-import config
+from conf import config
 import functools
 from playhouse.db_url import connect
 
 
 def get_db():
-    return connect(config.DB_URL)
+    return connect(config.general['db_url'])
 
 
 def provide_db(func):
@@ -21,9 +21,9 @@ def provide_db(func):
 
 @provide_db
 def setup(db):
-    from app.models.site import Site
-    from app.models.comment import Comment
-    from app.models.reader import Reader
-    from app.models.report import Report
+    from models.site import Site
+    from models.comment import Comment
+    from models.reader import Reader
+    from models.report import Report
 
     db.create_tables([Site, Comment, Reader, Report], safe=True)
diff --git a/app/services/processor.py b/app/core/processor.py
similarity index 91%
rename from app/services/processor.py
rename to app/core/processor.py
index 7fbecb3..f75b986 100644
--- a/app/services/processor.py
+++ b/app/core/processor.py
@@ -9,21 +9,27 @@ from threading import Thread
 from queue import Queue
 from jinja2 import Environment
 from jinja2 import FileSystemLoader
-from app.models.site import Site
-from app.models.reader import Reader
-from app.models.report import Report
-from app.models.comment import Comment
-from app.helpers.hashing import md5
+from models.site import Site
+from models.reader import Reader
+from models.report import Report
+from models.comment import Comment
+from helpers.hashing import md5
 import json
-import config
+from conf import config
 import PyRSS2Gen
 import markdown
+import zmq
 
 logger = logging.getLogger(__name__)
 queue = Queue()
 proc = None
 env = None
 
+if config.zmq['active']:
+    context = zmq.Context()
+    zpub = context.socket(zmq.PUB)
+    zpub.connect('tcp://127.0.0.1:{}'.format(config.zmq['sub_port']))
+
 
 class Processor(Thread):
 
@@ -69,7 +75,7 @@ def new_comment(data):
     subscribe = data.get('subscribe', '')
 
     # private mode: email contains gravar md5 hash
-    if config.PRIVATE:
+    if config.security['private']:
         author_gravatar = author_email
         author_email = ''
     else:        
@@ -112,7 +118,7 @@ def new_comment(data):
     mail(site.admin_email, subject, email_body)
 
     # Reader subscribes to further comments
-    if not config.PRIVATE and subscribe and author_email:
+    if not config.security['private'] and subscribe and author_email:
         subscribe_reader(author_email, token, url)
 
     logger.debug("new comment processed ")
@@ -171,7 +177,7 @@ def reply_comment_email(data):
         mail(from_email, 'Re: ' + subject, email_body)
 
         # notify reader once comment is published
-        if not config.PRIVATE:
+        if not config.security['private']:
             reader_email = get_email_metadata(message)
             if reader_email:
                 notify_reader(from_email, reader_email, comment.site.token,
@@ -258,7 +264,7 @@ def notify_subscribed_readers(token, site_url, url):
         to_email = reader.email
         logger.info('notify reader %s' % to_email)
         unsubscribe_url = '%s/unsubscribe?email=%s&token=%s&url=%s' % (
-                          config.ROOT_URL, to_email, token, reader.url)
+                          config.http['root_url'], to_email, token, reader.url)
         email_body = get_template(
             'notify_subscriber').render(article_url=article_url,
                                         unsubscribe_url=unsubscribe_url)
@@ -337,8 +343,8 @@ def report(token):
         unsubscribed.append({'url': "http://" + site.url + row.url,
                              'name': row.name, 'email': row.email})
 
-    email_body = get_template('report').render(secret=config.SECRET,
-                                               root_url=config.ROOT_URL,
+    email_body = get_template('report').render(secret=config.security['secret'],
+                                               root_url=config.http['root_url'],
                                                standbys=standbys,
                                                published=published,
                                                rejected=rejected,
@@ -354,7 +360,7 @@ def report(token):
 
 def rss(token, onstart=False):
 
-    if onstart and os.path.isfile(config.RSS_FILE):
+    if onstart and os.path.isfile(config.rss['file']):
         return
 
     site = Site.select().where(Site.token == token).get()
@@ -365,9 +371,9 @@ def rss(token, onstart=False):
     for row in Comment.select().join(Site).where(
             Site.token == token, Comment.published).order_by(
                 -Comment.published).limit(10):
-        item_link = "%s://%s%s" % (config.RSS_URL_PROTO, site.url, row.url)
+        item_link = "%s://%s%s" % (config.rss['proto'], site.url, row.url)
         items.append(PyRSS2Gen.RSSItem(
-            title='%s - %s://%s%s' % (config.RSS_URL_PROTO, row.author_name, site.url, row.url),
+            title='%s - %s://%s%s' % (config.rss['proto'], row.author_name, site.url, row.url),
             link=item_link,
             description=md.convert(row.content),
             guid=PyRSS2Gen.Guid('%s/%d' % (item_link, row.id)),
@@ -376,11 +382,11 @@ def rss(token, onstart=False):
 
     rss = PyRSS2Gen.RSS2(
         title=rss_title,
-        link='%s://%s' % (config.RSS_URL_PROTO, site.url),
+        link='%s://%s' % (config.rss['proto'], site.url),
         description="Commentaires du site '%s'" % site.name,
         lastBuildDate=datetime.now(),
         items=items)
-    rss.write_xml(open(config.RSS_FILE, "w"), encoding="utf-8")
+    rss.write_xml(open(config.rss['file'], 'w'), encoding='utf-8')
 
 
 def mail(to_email, subject, message):
@@ -400,7 +406,7 @@ def mail(to_email, subject, message):
 
 
 def get_template(name):
-    return env.get_template(config.LANG + '/' + name + '.tpl')
+    return env.get_template(config.general['lang'] + '/' + name + '.tpl')
 
 
 def enqueue(something):
diff --git a/app/helpers/hashing.py b/app/helpers/hashing.py
index 2d91635..207da43 100644
--- a/app/helpers/hashing.py
+++ b/app/helpers/hashing.py
@@ -2,11 +2,11 @@
 # -*- coding: UTF-8 -*-
 
 import hashlib
-import config
+from conf import config
 
 
 def salt(value):
-    string = '%s%s' % (value, config.SALT)
+    string = '%s%s' % (value, config.security['salt'])
     dk = hashlib.sha256(string.encode())
     return dk.hexdigest()
 
diff --git a/app/interface/api.py b/app/interface/api.py
index e03591d..db35e22 100644
--- a/app/interface/api.py
+++ b/app/interface/api.py
@@ -2,12 +2,11 @@
 # -*- coding: utf-8 -*-
 
 import logging
-import config
 from flask import request, jsonify, abort
-from app import app
-from app.models.site import Site
-from app.models.comment import Comment
-from app.services import processor
+from core import app
+from models.site import Site
+from models.comment import Comment
+from core import processor
 
 logger = logging.getLogger(__name__)
 
diff --git a/app/interface/form.py b/app/interface/form.py
index dbcf714..9998b2c 100644
--- a/app/interface/form.py
+++ b/app/interface/form.py
@@ -2,13 +2,12 @@
 # -*- coding: utf-8 -*-
 
 import logging
-import config
 from flask import request, jsonify, abort, redirect
-from app import app
-from app.models.site import Site
-from app.models.comment import Comment
-from app.helpers.hashing import md5
-from app.services import processor
+from core import app
+from models.site import Site
+from models.comment import Comment
+from helpers.hashing import md5
+from core import processor
 
 logger = logging.getLogger(__name__)
 
diff --git a/app/interface/mail.py b/app/interface/mail.py
index 7ade3fc..ccebbb9 100644
--- a/app/interface/mail.py
+++ b/app/interface/mail.py
@@ -3,8 +3,8 @@
 
 import logging
 from flask import request, abort
-from app import app
-from app.services import processor
+from core import app
+from core import processor
 
 logger = logging.getLogger(__name__)
 
diff --git a/app/interface/reader.py b/app/interface/reader.py
index 2673105..fb6149b 100644
--- a/app/interface/reader.py
+++ b/app/interface/reader.py
@@ -3,8 +3,8 @@
 
 import logging
 from flask import request, abort
-from app import app
-from app.services import processor
+from core import app
+from core import processor
 
 logger = logging.getLogger(__name__)
 
diff --git a/app/interface/report.py b/app/interface/report.py
index c3467fd..297b76c 100644
--- a/app/interface/report.py
+++ b/app/interface/report.py
@@ -2,13 +2,13 @@
 # -*- coding: utf-8 -*-
 
 import logging
-import config
+from conf import config
 from flask import request, jsonify, abort
-from app import app
-from app.models.site import Site
-from app.models.comment import Comment
-from app.helpers.hashing import md5
-from app.services import processor
+from core import app
+from models.site import Site
+from models.comment import Comment
+from helpers.hashing import md5
+from core import processor
 
 logger = logging.getLogger(__name__)
 
@@ -19,7 +19,7 @@ def report():
         token = request.args.get('token', '')
         secret = request.args.get('secret', '')
 
-        if secret != config.SECRET:
+        if secret != config.security['secret']:
             logger.warn('Unauthorized request')
             abort(401)
 
@@ -45,7 +45,7 @@ def accept_comment():
         id = request.args.get('comment', '')
         secret = request.args.get('secret', '')
 
-        if secret != config.SECRET:
+        if secret != config.security['secret']:
             logger.warn('Unauthorized request')
             abort(401)
 
@@ -65,7 +65,7 @@ def reject_comment():
         id = request.args.get('comment', '')
         secret = request.args.get('secret', '')
 
-        if secret != config.SECRET:
+        if secret != config.security['secret']:
             logger.warn('Unauthorized request')
             abort(401)
 
diff --git a/app/interface/zclient.py b/app/interface/zclient.py
index 69bfb8b..a467428 100644
--- a/app/interface/zclient.py
+++ b/app/interface/zclient.py
@@ -6,7 +6,7 @@ from conf import config
 from threading import Thread
 import logging
 import json
-from app.services import processor
+from core import processor
 
 logger = logging.getLogger(__name__)
 
diff --git a/app/models/comment.py b/app/models/comment.py
index 9ebdfb7..502f0bf 100644
--- a/app/models/comment.py
+++ b/app/models/comment.py
@@ -6,8 +6,8 @@ from peewee import CharField
 from peewee import TextField
 from peewee import DateTimeField
 from peewee import ForeignKeyField
-from app.models.site import Site
-from app.services.database import get_db
+from models.site import Site
+from core.database import get_db
 
 
 class Comment(Model):
diff --git a/app/models/reader.py b/app/models/reader.py
index a1eae15..212c74b 100644
--- a/app/models/reader.py
+++ b/app/models/reader.py
@@ -4,8 +4,8 @@
 from peewee import Model
 from peewee import CharField
 from peewee import ForeignKeyField
-from app.services.database import get_db
-from app.models.site import Site
+from core.database import get_db
+from models.site import Site
 
 
 class Reader(Model):
diff --git a/app/models/report.py b/app/models/report.py
index 44e8ac0..bda6e68 100644
--- a/app/models/report.py
+++ b/app/models/report.py
@@ -5,8 +5,8 @@ from peewee import Model
 from peewee import CharField
 from peewee import BooleanField
 from peewee import ForeignKeyField
-from app.services.database import get_db
-from app.models.site import Site
+from core.database import get_db
+from models.site import Site
 
 class Report(Model):
     name = CharField()
diff --git a/app/models/site.py b/app/models/site.py
index 9c34cb2..156ebb3 100644
--- a/app/models/site.py
+++ b/app/models/site.py
@@ -3,7 +3,7 @@
 
 from peewee import Model
 from peewee import CharField
-from app.services.database import get_db
+from core.database import get_db
 
 
 class Site(Model):
diff --git a/app/stacosys.py b/app/stacosys.py
new file mode 100644
index 0000000..8d26708
--- /dev/null
+++ b/app/stacosys.py
@@ -0,0 +1,37 @@
+#!/usr/bin/python
+# -*- coding: UTF-8 -*-
+
+import logging
+import json
+from clize import clize, run
+from jsonschema import validate
+from conf import config, schema
+
+def load_json(filename):
+    jsondoc = None
+    with open(filename, 'rt') as json_file:
+        jsondoc = json.loads(json_file.read())
+    return jsondoc
+
+
+@clize
+def stacosys_server(config_pathname):
+
+    # load and validate startup config
+    conf = load_json(config_pathname)
+    json_schema = json.loads(schema.json_schema) 
+    v = validate(conf, json_schema)
+    print('validation: {}'.format(v))
+    
+    # set configuration
+    config.general = conf['general']
+    config.http = conf['http']
+    config.security = conf['security']
+    config.rss = conf['rss']
+    config.zmq = conf['zmq']
+
+    # start application
+    from core import app
+
+if __name__ == '__main__':
+    run(stacosys_server)
\ No newline at end of file
diff --git a/config.json b/config.json
new file mode 100644
index 0000000..7b6be9e
--- /dev/null
+++ b/config.json
@@ -0,0 +1,27 @@
+{
+    "general" : {
+        "debug": true,
+        "lang": "fr",
+        "db_url": "sqlite:///db.sqlite"
+    },
+    "http": {
+        "root_url": "http://localhost:8100",
+        "host": "127.0.0.1",
+        "port": 8100
+    },
+    "security": {
+        "salt": "BRRJRqXgGpXWrgTidBPcixIThHpDuKc0",
+        "secret": "Uqca5Kc8xuU6THz9",
+        "private": true
+    },
+    "rss": {
+        "proto": "http",
+        "file": "comments.xml"
+    },
+    "zmq": {
+        "active": true,
+        "host": "127.0.0.1",
+        "pub_port": 7701,
+        "sub_port": 7702
+    }
+}
diff --git a/config.py b/config.py
deleted file mode 100644
index 219e3e7..0000000
--- a/config.py
+++ /dev/null
@@ -1,25 +0,0 @@
-# Configuration file
-
-DEBUG = True
-
-LANG = "fr"
-
-# DB_URL = "mysql://stacosys_user:stacosys_password@localhost:3306/stacosys"
-DB_URL = "sqlite:///db.sqlite"
-
-MAIL_URL = "http://localhost:8025/mbox"
-
-HTTP_ADDRESS = "127.0.0.1"
-HTTP_PORT = 8100
-HTTP_WORKERS = 1
-
-SALT = "BRRJRqXgGpXWrgTidBPcixIThHpDuKc0"
-
-SECRET = "Uqca5Kc8xuU6THz9"
-
-ROOT_URL = 'http://localhost:8100'
-
-RSS_URL_PROTO = 'http'
-RSS_FILE = 'comments.xml'
-
-PRIVATE = True
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 33c72d6..c5fd0c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,11 +1,19 @@
+attrs==17.4.0
 chardet==3.0.4
 click==6.7
+clize==4.0.3
+docutils==0.14
 Flask==0.12.2
+Flask-Cors==3.0.3
 itsdangerous==0.24
 Jinja2==2.10
+jsonschema==2.6.0
 Markdown==2.6.11
 MarkupSafe==1.0
+od==1.0
 peewee==2.10.2
 PyRSS2Gen==1.1
 pyzmq==16.0.3
+sigtools==2.0.1
+six==1.11.0
 Werkzeug==0.14.1
diff --git a/run.sh b/run.sh
index a3b0364..3300b92 100755
--- a/run.sh
+++ b/run.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
-python app/run.py "$@"
+python app/stacosys.py "$@"