Thanks for your help my friends but my request still sending in 200 with my values's form but nothing in Database
model.py : 
# -*- coding: utf-8 -*-
from odoo import models, fields, api
class MonHelpdeskTicket(models.Model):
    """Champs qui compose le modele d'une offres. Ce sont principalement les champs à compléter dans le formulaire"""
    _name = "monmarchepublic"
    _inherit = 'res.users'
    _inherit = [
        'mail.thread',
        'ir.needaction_mixin',
    ]
    x_name = fields.Char('Nom et Prenom', readonly=0, website_form_blacklisted=0, Store=True )
    x_objet_consultation = fields.Char('Objet de la consultation', readonly=0, website_form_blacklisted=0, Store=True)
    x_membre_interne = fields.Char("Membres de l'équipe INTERNE Coopaname", readonly=0, website_form_blacklisted=0, Store=True)
    x_membre_externe = fields.Char(" Membres de l'équipe EXTERNE et/ou informations utiles", readonly=0, website_form_blacklisted=0, Store=True)
    x_equipeok = fields.Boolean('Equipe complète', readonly=0, website_form_blacklisted=0, Store=True)
    x_admin = fields.Char('Administration', readonly=0, website_form_blacklisted=0, Store=True)
    x_inputstreet1 = fields.Char('N° et Rue', readonly=0, website_form_blacklisted=0, Store=True)
    x_inputcity1 = fields.Char('Ville', readonly=0, website_form_blacklisted=0, Store=True)
    x_inputzip1 = fields.Char('Code Postal', readonly=0, website_form_blacklisted=0, Store=True)
    x_date_order = fields.Date('Date de publication', readonly=0, website_form_blacklisted=0, Store=True)
    x_type_marche = fields.Selection([("offre_ferme", "Appel d'offre Fermé"), ('offre_ouvert', "Appel d'offre Ouvert"), ('concours', 'Concours'), ('consultation', 'Consultation'), ('mapa', 'MAPA')], readonly=0, website_form_blacklisted=0, Store=True)
    x_date_limite = fields.Datetime('Date et heure limites de dépot de candidature', readonly=0, website_form_blacklisted=0, Store=True)
    x_duree_marche = fields.Char('Durée du marché', readonly=0, website_form_blacklisted=0, Store=True)
    x_montant_marche = fields.Char('Montant du marché', readonly=0, website_form_blacklisted=0, Store=True)
    x_inputstreet2 = fields.Char('N° et Rue', readonly=0, website_form_blacklisted=0, Store=True)
    x_inputcity2 = fields.Char('Ville', readonly=0, website_form_blacklisted=0, Store=True)
    x_inputzip2 = fields.Char('Code Postal', readonly=0, website_form_blacklisted=0, Store=True)
    x_num_ref = fields.Char('Numéro de référence attribué au marché', readonly=0, website_form_blacklisted=0, Store=True)
    x_cat = fields.Selection([("Etudes, Maitrise d oeuvre, Controle", "Etudes, Maîtrise d'oeuvre, Contrôle"), ('Travaux de batiment', 'Travaux de bâtiment'), ('Travaux Publics', 'Travaux Publics'), ('Fournitures', 'Fournitures'), ('Services', 'Services')], readonly=0, website_form_blacklisted=0, Store=True)
    x_pj = fields.Char('Pièce Jointe', readonly=0, website_form_blacklisted=0, Store=True)
    x_ville_adju = fields.Char('Ville du Pouvoir Adjudicateur', readonly=0, website_form_blacklisted=0, Store=True)
    x_mail = fields.Char('Email', readonly=0, website_form_blacklisted=0, Store=True)
    x_etape = fields.Selection([('New', 'New'), ('CCTP', 'CCTP'), ('En cours de traitement', 'En cours de traitement'), ('Valide', 'Validé'), ('Refuse', 'Refusé'), ('Archive', 'Archivé')], readonly=0, website_form_blacklisted=0, Store=True)
    message_ids = fields.One2many('mail.message',  'res_id', string="Commentaire", Store=True)
    partner_ids = fields.Many2many('res.partner', string='Recipients', help="List of partners that will be added as follower of the current document.", readonly=0, website_form_blacklisted=0, Store=True)
    message_partner_ids = fields.Many2many(
        comodel_name='res.partner', string='Followers Test',
        compute='_get_followers', search='_search_follower_partners', readonly=0, website_form_blacklisted=0, Store=True)
    follower_ids = fields.One2many('mail.followers',  'res_id', string="follo", readonly=0, website_form_blacklisted=0, Store=True)
and 
controller.py : 
@http.route('/coopaname_helpdesk/post_form_ticket/<string:model_name>',  methods=['POST'], type = 'http', auth='public',  website= True )
def website_form(self, model_name, **kwargs): 
    try:
        objet_consultation = kwargs.get('x_objet_consultation')
        cat = kwargs.get('x_cat')
        membre_interne = kwargs.get('x_membre_interne')
        membre_externe = kwargs.get('x_membre_externe')
        equipeok = kwargs.get('x_equipeok')
        admin = kwargs.get('x_admin')
        type_marche = kwargs.get('x_type_marche')
        ville_adju = kwargs.get('x_ville_adju')
        date_order = kwargs.get('x_date_order')
        date_limite = kwargs.get('x_date_limite')
        duree_marche = kwargs.get('x_duree_marche')
        montant_marche = kwargs.get('x_montant_marche')
        num_ref = kwargs.get('x_num_ref')
        pj = kwargs.get('x_pj')
        name = kwargs.get('x_name')
        mail = kwargs.get('x_mail')
        inputstreet1 = kwargs.get('x_inputstreet1')
        inputcity1 = kwargs.get('x_inputcity1')
        inputzip1 = kwargs.get('x_inputzip1')
        inputstreet2 = kwargs.get('x_inputstreet2')
        inputcity2 = kwargs.get('x_inputcity2')
        inputzip2 = kwargs.get('x_inputzip2')
        data = {
                'x_cat' : cat,
                'x_objet_consultation' : objet_consultation,
                'x_membre_interne' : membre_interne,
                'x_membre_externe' : membre_externe,
                'x_equipeok' : equipeok,
                'x_admin' : admin,
                'x_type_marche' : type_marche,
                'x_ville_adju':ville_adju,
                'x_date_order': date_order,
                'x_date_limite': date_limite,
                'x_duree_marche': duree_marche,
                'x_montant_marche' : montant_marche,
                'x_num_ref' : num_ref,
                'x_pj' : pj,
                'x_name' : name,
                'x_mail' : mail,
                'x_inputstreet1' : inputstreet1,
                'x_inputcity1' : inputcity1,
                'x_inputzip1' : inputzip1,
                'x_inputstreet2': inputstreet2,
                'x_inputzip2' : inputzip2,
                'x_inputcity2' : inputcity2
                 }
        return request.env.cr['monmarchepublic'].create(data)
    except:
            return json.dumps({'error' : ' tout est casse'})But the code run into the except because i receive the error in param