diff --git a/passerelle/contrib/greco/formdata.py b/passerelle/contrib/greco/formdata.py
index 97b0ba69..ad18f0a8 100644
--- a/passerelle/contrib/greco/formdata.py
+++ b/passerelle/contrib/greco/formdata.py
@@ -101,6 +101,7 @@ class FormData:
 
         # extract/create/validate fields according to schema
         self.fields = {}
+        self.json = {}
         for fieldname in schema:
             if isinstance(fieldname, tuple):
                 value = values.get(fieldname[0])
@@ -114,6 +115,22 @@ class FormData:
                 value = values.get(fieldname)
             if value is not None:
                 self.fields[fieldname] = value
+                if isinstance(value, datetime):
+                    value = value.strftime('%Y-%m-%dT%H:%M:%S')
+                if '_' not in fieldname:
+                    self.json[fieldname] = value
+                    continue
+                key, subkey = fieldname.split('_')
+                if key not in self.json:
+                    self.json[key] = {}
+                self.json[key][subkey] = value
+
+        # https://dev.entrouvert.org/issues/75259
+        danger = self.json.get('danger', '')
+        if danger:
+            self.json['danger'] = 'true'
+        else:
+            self.json['danger'] = 'false'
 
         # extract attachments
         self.attachments = []
diff --git a/passerelle/contrib/greco/migrations/0001_initial.py b/passerelle/contrib/greco/migrations/0001_initial.py
index 9721fb81..69d78931 100644
--- a/passerelle/contrib/greco/migrations/0001_initial.py
+++ b/passerelle/contrib/greco/migrations/0001_initial.py
@@ -37,7 +37,7 @@ class Migration(migrations.Migration):
                 ('application', models.CharField(max_length=200, verbose_name='Application identifier')),
                 ('token_url', models.URLField(max_length=256, verbose_name='Token URL')),
                 ('token_authorization', models.CharField(max_length=128, verbose_name='Token Authorization')),
-                ('wsdl_url', models.CharField(max_length=256, verbose_name='WSDL URL')),
+                ('wsdl_url', models.CharField(max_length=256, verbose_name='WSDL or REST URL')),
                 (
                     'verify_cert',
                     models.BooleanField(default=True, verbose_name='Check HTTPS Certificate validity'),
diff --git a/passerelle/contrib/greco/migrations/0004_rest_api.py b/passerelle/contrib/greco/migrations/0004_rest_api.py
new file mode 100644
index 00000000..93d825d2
--- /dev/null
+++ b/passerelle/contrib/greco/migrations/0004_rest_api.py
@@ -0,0 +1,23 @@
+# Generated by Django 2.2.26 on 2023-02-01 11:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('greco', '0003_remove_greco_log_level'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='greco',
+            name='api_type',
+            field=models.CharField(
+                choices=[('soap', 'SOAP'), ('rest', 'REST')],
+                default='soap',
+                max_length=4,
+                verbose_name='API Type',
+            ),
+        ),
+    ]
diff --git a/passerelle/contrib/greco/models.py b/passerelle/contrib/greco/models.py
index e1de739a..f593055c 100644
--- a/passerelle/contrib/greco/models.py
+++ b/passerelle/contrib/greco/models.py
@@ -14,12 +14,15 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
+import io
 import json
 import re
+import urllib
 from email.mime.base import MIMEBase
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
 
+import requests
 import suds.sudsobject
 from django.core.cache import cache
 from django.db import models
@@ -34,6 +37,12 @@ from passerelle.utils.api import APIError, endpoint
 
 from .formdata import CREATION_SCHEMA, FormData, list_schema_fields
 
+API_TYPES = (
+    ('soap', 'SOAP'),
+    ('rest', 'REST'),
+)
+
+
 # taken from https://lsimons.wordpress.com/2011/03/17/stripping-illegal-characters-out-of-xml-in-python/
 _illegal_xml_chars_RE = re.compile('[\x00-\x08\x0b\x0c\x0e-\x1F\uD800-\uDFFF\uFFFE\uFFFF]')
 
@@ -69,8 +78,9 @@ class Greco(BaseResource):
     application = models.CharField(_('Application identifier'), max_length=200)
     token_url = models.URLField(_('Token URL'), max_length=256)
     token_authorization = models.CharField(_('Token Authorization'), max_length=128)
-    wsdl_url = models.CharField(_('WSDL URL'), max_length=256)  # not URLField, it can be file://
+    wsdl_url = models.CharField(_('WSDL or REST URL'), max_length=256)  # not URLField, it can be file://
     verify_cert = models.BooleanField(default=True, verbose_name=_('Check HTTPS Certificate validity'))
+    api_type = models.CharField(_('API Type'), max_length=4, choices=API_TYPES, default='soap')
 
     hide_description_fields = ['token_authorization']
     category = _('Business Process Connectors')
@@ -78,6 +88,10 @@ class Greco(BaseResource):
     class Meta:
         verbose_name = _('GRECO Webservices')
 
+    @property
+    def use_soap(self):
+        return self.api_type == 'soap'
+
     def get_token(self, renew=False):
         cache_key = 'greco-%s-token' % self.id
         if not renew:
@@ -215,8 +229,60 @@ class Greco(BaseResource):
 
         return Client(url=self.wsdl_url, transport=Transport(self, attachments))
 
+    def _rest_call(self, path, method='get', json_data=None, params=None, files=None):
+        headers = {'Authorization': self.get_token()}
+        url = urllib.parse.urljoin(self.wsdl_url, path)
+        try:
+            resp = self.requests.request(
+                method=method,
+                url=url,
+                headers=headers,
+                json=json_data,
+                params=params,
+                files=files,
+            )
+        except (requests.Timeout, requests.RequestException) as e:
+            raise APIError(str(e))
+        if resp.status_code == 401:
+            # ask for a new token, and retry
+            headers['Authorization'] = self.get_token(renew=True)
+            try:
+                resp = self.requests.request(
+                    method=method,
+                    url=url,
+                    headers=headers,
+                    json=json_data,
+                    params=params,
+                    files=files,
+                )
+            except (requests.Timeout, requests.RequestException) as e:
+                raise APIError(str(e))
+
+        try:
+            resp.raise_for_status()
+        except requests.RequestException as e:
+            try:
+                err_data = resp.json()
+            except (json.JSONDecodeError, requests.RequestException):
+                err_data = {'response_text': resp.text}
+            raise APIError(str(e), data=err_data)
+
+        content_type = resp.headers.get('Content-Type')
+        if content_type and content_type.startswith('application/json'):
+            try:
+                return resp.json()
+            except (json.JSONDecodeError, requests.RequestException) as e:
+                err_data = {'response_text': resp.text}
+                raise APIError(str(e), data=err_data)
+
+        raise APIError(resp.text)
+
     def check_status(self):
-        if self.get_client().service.communicationTest('ping') is None:
+        if self.use_soap:
+            response = self.get_client().service.communicationTest('ping')
+        else:
+            response = self._rest_call('communicationTest/ping').get('reponse')
+        if not response:
             raise Exception('empty answer to communication test')
 
     @endpoint(
@@ -227,8 +293,12 @@ class Greco(BaseResource):
         display_order=1,
     )
     def ping(self, request):
-        resp = self.get_client().service.communicationTest('ping')
-        if resp is None:
+        if self.use_soap:
+            resp = self.get_client().service.communicationTest('ping')
+        else:
+            json_data = self._rest_call('communicationTest/ping')
+            resp = json_data.get('reponse')
+        if not resp:
             raise APIError('empty response from communicationTest()')
         return {'data': resp}
 
@@ -261,16 +331,32 @@ Response :
             formdata = FormData(json.loads(request.body), CREATION_SCHEMA)
         except ValueError as e:
             raise ParameterTypeError(str(e))
-        # create suds object from formdata
-        client = self.get_client(formdata.attachments)
-        creation = client.factory.create('DemandeCreation')
-        creation.application = self.application
-        fill_sudsobject_with_dict(creation, formdata.fields)
-        # send it to "creer"
-        resp = client.service.creer(creation)
-        if resp is None:
-            raise APIError('empty response from creer()')
-        return {'data': sudsobject_to_dict(resp)}
+        if self.use_soap:
+            # create suds object from formdata
+            client = self.get_client(formdata.attachments)
+            creation = client.factory.create('DemandeCreation')
+            creation.application = self.application
+            fill_sudsobject_with_dict(creation, formdata.fields)
+            # send it to "creer"
+            resp = client.service.creer(creation)
+            if resp is None:
+                raise APIError('empty response from creer()')
+            data = sudsobject_to_dict(resp)
+        else:
+            files = []
+            for num, attachment in enumerate(formdata.attachments):
+                filename = attachment.get('filename') or 'file%s.bin' % num
+                content = base64.b64decode(attachment.get('content') or '')
+                content_type = attachment.get('content_type') or 'application/octet-stream'
+                files.append(('files', (filename, content, content_type)))
+            files.append(
+                (
+                    'creerRequest',
+                    (None, io.BytesIO(json.dumps(formdata.json).encode('utf-8')), 'application/json'),
+                )
+            )
+            data = self._rest_call('creer', method='post', files=files)
+        return {'data': data}
 
     @classmethod
     def creation_fields(cls):
@@ -289,15 +375,18 @@ Response :
         display_order=3,
     )
     def status(self, request, idgreco, iddemande=None):
-        resp = self.get_client().service.consulter(
-            {
-                'idgreco': idgreco,
-                'iddemande': iddemande,
-            }
-        )
-        if resp is None:
-            raise APIError('empty response from status()')
-        return {'data': sudsobject_to_dict(resp)}
+        params = {
+            'idgreco': idgreco,
+            'iddemande': iddemande,
+        }
+        if self.use_soap:
+            resp = self.get_client().service.consulter(params)
+            if resp is None:
+                raise APIError('empty response from status()')
+            data = sudsobject_to_dict(resp)
+        else:
+            data = self._rest_call('consulter', params=params)
+        return {'data': data}
 
     @endpoint(
         perm='can_access',
@@ -313,10 +402,14 @@ Response :
         }
         if code:
             params['taCode'] = code
-        resp = self.get_client().service.getMail(params)
-        if resp is None:
-            raise APIError('empty response from consulter()')
-        return {'data': sudsobject_to_dict(resp)}
+        if self.use_soap:
+            resp = self.get_client().service.getMail(params)
+            if resp is None:
+                raise APIError('empty response from consulter()')
+            data = sudsobject_to_dict(resp)
+        else:
+            data = self._rest_call('getMail', params=params)
+        return {'data': data}
 
     @endpoint(
         perm='can_access',
@@ -335,16 +428,19 @@ Response :
             idgreco = payload.get('idgreco') or idgreco
             iddemande = payload.get('iddemande') or iddemande
             information = payload.get('information') or information
-        resp = self.get_client().service.ajouterComplementInformation(
-            {
-                'idgreco': idgreco,
-                'iddemande': iddemande,
-                'complementInfo': information,
-            }
-        )
-        if resp is None:
-            raise APIError('empty response from ajouterComplementInformation()')
-        return {'data': sudsobject_to_dict(resp)}
+        json_body = {
+            'idgreco': idgreco,
+            'iddemande': iddemande,
+            'complementInfo': information,
+        }
+        if self.use_soap:
+            resp = self.get_client().service.ajouterComplementInformation(json_body)
+            if resp is None:
+                raise APIError('empty response from ajouterComplementInformation()')
+            data = sudsobject_to_dict(resp)
+        else:
+            data = self._rest_call('ajouterComplementInformation', method='post', json_data=json_body)
+        return {'data': data}
 
     @endpoint(
         perm='can_access',
@@ -362,16 +458,19 @@ Response :
             idgreco = payload.get('idgreco') or idgreco
             iddemande = payload.get('iddemande') or iddemande
             comment = payload.get('comment') or comment
-        resp = self.get_client().service.relancer(
-            {
-                'idgreco': idgreco,
-                'iddemande': iddemande,
-                'commentaire': comment,
-            }
-        )
-        if resp is None:
-            raise APIError('empty response from relancer()')
-        return {'data': sudsobject_to_dict(resp)}
+        params = {
+            'idgreco': idgreco,
+            'iddemande': iddemande,
+            'commentaire': comment,
+        }
+        if self.use_soap:
+            resp = self.get_client().service.relancer(params)
+            if resp is None:
+                raise APIError('empty response from relancer()')
+            data = sudsobject_to_dict(resp)
+        else:
+            data = self._rest_call('relancer', params=params)
+        return {'data': data}
 
     @endpoint(
         perm='can_access',
@@ -389,13 +488,16 @@ Response :
         idgreco = payload.get('idgreco')
         iddemande = payload.get('iddemande')
         nbr = payload.get('nbconfirmation')
-        resp = self.get_client().service.confirmer(
-            {
-                'idGreco': idgreco,
-                'idDemande': iddemande,
-                'nbconfirmation': nbr,
-            }
-        )
-        if resp is None:
-            raise APIError('empty response from confirmer()')
-        return {'data': sudsobject_to_dict(resp)}
+        params = {
+            'idGreco': idgreco,
+            'idDemande': iddemande,
+            'nbconfirmation': nbr,
+        }
+        if self.use_soap:
+            resp = self.get_client().service.confirmer(params)
+            if resp is None:
+                raise APIError('empty response from confirmer()')
+            data = sudsobject_to_dict(resp)
+        else:
+            data = self._rest_call('confirmer', params=params)
+        return {'data': data}
diff --git a/tests/test_greco.py b/tests/test_greco.py
index d022c855..3da5c787 100644
--- a/tests/test_greco.py
+++ b/tests/test_greco.py
@@ -14,15 +14,18 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import copy
+import json
 import os
 import xml.etree.ElementTree as ET
 from base64 import b64encode
 from unittest import mock
 
 import pytest
+import responses
 from django.contrib.contenttypes.models import ContentType
 from django.urls import reverse
 from django.utils.encoding import force_str
+from requests_toolbelt import MultipartDecoder
 
 import tests.utils
 from passerelle.base.models import AccessRight, ApiUser
@@ -104,6 +107,7 @@ CREATE_PAYLOAD = {
     'transmetteur_service': 'GNM',
     'transmetteur_nom': 'Vertommen',
     'transmetteur_prenom': 'Agent 15',
+    'danger': False,
 }
 
 
@@ -126,6 +130,14 @@ def conn():
     return connector
 
 
+@pytest.fixture
+def rest_conn(conn):
+    conn.wsdl_url = 'http://greco.example.net'
+    conn.api_type = 'rest'
+    conn.save()
+    return conn
+
+
 @mock.patch('passerelle.utils.Request.post', side_effect=(RESP_503,))
 def test_greco_no_api_key(mocked_post, app, conn):
     url = reverse('generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'ping', 'slug': conn.slug})
@@ -204,6 +216,51 @@ def test_greco_create_ok(mocked_post, app, conn):
     }
 
 
+def test_greco_rest_create_ok(app, rest_conn):
+    url = reverse(
+        'generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'create', 'slug': rest_conn.slug}
+    )
+    url += '?apikey=grecokey'
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.post(
+            'http://greco.example.net/creer',
+            status=200,
+            json={
+                'iddemande': 'MDFGDZRF',
+                'idgreco': '538593',
+                'etat': '1 - Créée',
+                'application': '69999',
+            },
+        )
+        resp = app.post_json(url, params=CREATE_PAYLOAD)
+        create_request = rsps.calls[-1].request
+
+    decoder = MultipartDecoder(create_request.body, create_request.headers['content-type'])
+    assert len(decoder.parts) == 1
+    json_part = decoder.parts[0]
+    assert json_part.headers[b'Content-Type'] == b'application/json'
+    demande_creation = json.loads(json_part.content)
+    assert demande_creation['application'] == '69999'
+    assert demande_creation['localisation']['xgeoloc'] == '50.89491'
+    assert demande_creation['localisation']['ygeoloc'] == '4.34151'
+    assert demande_creation['transmetteur']['nom'] == 'Vertommen'
+    assert demande_creation['transmetteur']['prenom'] == 'Agent 15'
+    assert demande_creation['danger'] == 'false'
+
+    assert not resp.json['err']
+    assert resp.json['data'] == {
+        'iddemande': 'MDFGDZRF',
+        'idgreco': '538593',
+        'etat': '1 - Créée',
+        'application': '69999',
+    }
+
+
 @mock.patch('passerelle.utils.Request.post', side_effect=(TOKEN, CREATE_OK))
 def test_greco_create_ok_no_application(mocked_post, app, conn):
     url = reverse('generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'create', 'slug': conn.slug})
@@ -271,6 +328,59 @@ def test_greco_create_enclosed(mocked_post, app, conn):
     assert not resp.json['err']
 
 
+def test_greco_rest_create_enclosed(app, rest_conn):
+    url = reverse(
+        'generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'create', 'slug': rest_conn.slug}
+    )
+    url += '?apikey=grecokey'
+
+    payload = CREATE_PAYLOAD
+    payload['iddemande'] = ('MDFGDARF',)
+    payload['piece_jointe1'] = {
+        'content': force_str(b64encode(b'my picture content')),
+        'filename': 'foo.png',
+        'content_type': 'image/png',
+    }
+
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.post(
+            'http://greco.example.net/creer',
+            status=200,
+            json={
+                'iddemande': 'MDFGDZRF',
+                'idgreco': '538593',
+                'etat': '1 - Créée',
+                'application': '69999',
+            },
+        )
+        resp = app.post_json(url, params=payload)
+        create_request = rsps.calls[-1].request
+
+    assert create_request.headers['content-type'].startswith('multipart/form-data')
+    decoder = MultipartDecoder(create_request.body, create_request.headers['content-type'])
+    assert len(decoder.parts) == 2
+
+    file_part = decoder.parts[0]
+    assert file_part.headers[b'Content-Type'] == b'image/png'
+    assert file_part.content == b'my picture content'
+
+    json_part = decoder.parts[1]
+    assert json_part.headers[b'Content-Type'] == b'application/json'
+    demande_creation = json.loads(json_part.content)
+    assert demande_creation['application'] == '69999'
+    assert demande_creation['localisation']['xgeoloc'] == '50.89491'
+    assert demande_creation['localisation']['ygeoloc'] == '4.34151'
+    assert demande_creation['transmetteur']['nom'] == 'Vertommen'
+    assert demande_creation['transmetteur']['prenom'] == 'Agent 15'
+
+    assert not resp.json['err']
+
+
 @mock.patch('passerelle.utils.Request.post', side_effect=(TOKEN, STATUS_OK))
 def test_greco_status_ok(mocked_post, app, conn):
     url = reverse('generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'status', 'slug': conn.slug})
@@ -294,6 +404,54 @@ def test_greco_status_ok(mocked_post, app, conn):
     }
 
 
+def test_greco_rest_status_ok(app, rest_conn):
+    url = reverse(
+        'generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'status', 'slug': rest_conn.slug}
+    )
+    url += '?apikey=grecokey'
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.get(
+            'http://greco.example.net/consulter?iddemande=MDFGDZRF&idgreco=538593',
+            status=200,
+            json={
+                'iddemande': 'MDFGDZRF',
+                'idgreco': '538593',
+                'motifsrejet': None,
+                'etat': '1 - Créée',
+                'commentaireReponse': None,
+                'comptesRendus': None,
+                'dateResolutionEffective': None,
+                'dateResolutionPrevue': '2021-03-16T14:14:23Z',
+                'groupeResponsable': 'DRTU/SPS/CIC-Centre info et contact',
+                'suiteDonnee': None,
+                'idOrganismeExterne': None,
+                'nomOrganisme': None,
+            },
+        )
+        resp = app.get(url, params={'idgreco': '538593', 'iddemande': 'MDFGDZRF'})
+
+    assert not resp.json['err']
+    assert resp.json['data'] == {
+        'iddemande': 'MDFGDZRF',
+        'idgreco': '538593',
+        'motifsrejet': None,
+        'etat': '1 - Créée',
+        'commentaireReponse': None,
+        'comptesRendus': None,
+        'dateResolutionEffective': None,
+        'dateResolutionPrevue': '2021-03-16T14:14:23Z',
+        'groupeResponsable': 'DRTU/SPS/CIC-Centre info et contact',
+        'suiteDonnee': None,
+        'idOrganismeExterne': None,
+        'nomOrganisme': None,
+    }
+
+
 @mock.patch('passerelle.utils.Request.post', side_effect=(TOKEN, STATUS_KO))
 def test_greco_status_ko(mocked_post, app, conn):
     url = reverse('generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'status', 'slug': conn.slug})
@@ -343,6 +501,57 @@ def test_greco_answer_ok(mocked_post, app, conn):
     }
 
 
+def test_greco_rest_answer_ok(app, rest_conn):
+    url = reverse(
+        'generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'answer', 'slug': rest_conn.slug}
+    )
+    url += '?apikey=grecokey'
+
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.get(
+            'http://greco.example.net/getMail?iddemande=MDFGDZRF&idgreco=538593',
+            status=200,
+            json={
+                'iddemande': 'DWPQGCTS',
+                'idgreco': '538554',
+                'motifsrejet': None,
+                'etat': None,
+                'message': {
+                    'bcc': {'item': []},
+                    'cc': {'item': []},
+                    'content': '...',
+                    'date': '10/02/2021 10:27:47',
+                    'subject': 'Métropole de Lyon : réponse à votre demande n° 538554',
+                    'to': {'item': ['gbaud@grandlyon.com']},
+                },
+            },
+        )
+        resp = app.get(url, params={'idgreco': '538593', 'iddemande': 'MDFGDZRF'})
+
+    assert not resp.json['err']
+    data = resp.json['data']
+    data['message']['content'] = '...'
+    assert data == {
+        'iddemande': 'DWPQGCTS',
+        'idgreco': '538554',
+        'motifsrejet': None,
+        'etat': None,
+        'message': {
+            'bcc': {'item': []},
+            'cc': {'item': []},
+            'content': '...',
+            'date': '10/02/2021 10:27:47',
+            'subject': 'Métropole de Lyon : réponse à votre demande n° 538554',
+            'to': {'item': ['gbaud@grandlyon.com']},
+        },
+    }
+
+
 @mock.patch('passerelle.utils.Request.post', side_effect=(TOKEN, ANSWER_KO))
 def test_greco_answer_ko(mocked_post, app, conn):
     url = reverse('generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'answer', 'slug': conn.slug})
@@ -375,6 +584,38 @@ def test_greco_add_information_ok(mocked_post, app, conn):
     }
 
 
+def test_greco_rest_add_information_ok(app, rest_conn):
+    url = reverse(
+        'generic-endpoint',
+        kwargs={'connector': 'greco', 'endpoint': 'add-information', 'slug': rest_conn.slug},
+    )
+    url += '?apikey=grecokey'
+
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.post(
+            'http://greco.example.net/ajouterComplementInformation',
+            status=200,
+            json={
+                'iddemande': 'ZHRNMWVP',
+                'idgreco': '538634',
+                'motifsrejet': None,
+            },
+        )
+        resp = app.get(url, params={'idgreco': '538593', 'iddemande': 'MDFGDZRF', 'information': 'my info'})
+
+    assert not resp.json['err']
+    assert resp.json['data'] == {
+        'iddemande': 'ZHRNMWVP',
+        'idgreco': '538634',
+        'motifsrejet': None,
+    }
+
+
 @mock.patch('passerelle.utils.Request.post', side_effect=(TOKEN, ADD_INFORMATION_KO))
 def test_greco_add_information_ko(mocked_post, app, conn):
     url = reverse(
@@ -405,6 +646,37 @@ def test_greco_update_ok(mocked_post, app, conn):
     }
 
 
+def test_greco_rest_update_ok(app, rest_conn):
+    url = reverse(
+        'generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'update', 'slug': rest_conn.slug}
+    )
+    url += '?apikey=grecokey'
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.get(
+            'http://greco.example.net/relancer?iddemande=KPZDXCLL&idgreco=538640&commentaire=mycomment',
+            status=200,
+            json={
+                'iddemande': 'KPZDXCLL',
+                'idgreco': '538640',
+                'motifsrejet': None,
+            },
+        )
+
+        resp = app.get(url, params={'idgreco': '538640', 'iddemande': 'KPZDXCLL', 'comment': 'mycomment'})
+
+    assert not resp.json['err']
+    assert resp.json['data'] == {
+        'iddemande': 'KPZDXCLL',
+        'idgreco': '538640',
+        'motifsrejet': None,
+    }
+
+
 @mock.patch('passerelle.utils.Request.post', side_effect=(TOKEN, UPDATE_KO))
 def test_greco_update_ko(mocked_post, app, conn):
     url = reverse('generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'update', 'slug': conn.slug})
@@ -435,6 +707,40 @@ def test_greco_add_confirmation_ok(mocked_post, app, conn):
     }
 
 
+def test_greco_rest_add_confirmation_ok(app, rest_conn):
+    url = reverse(
+        'generic-endpoint',
+        kwargs={'connector': 'greco', 'endpoint': 'add-confirmation', 'slug': rest_conn.slug},
+    )
+    url += '?apikey=grecokey'
+
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.get(
+            'http://greco.example.net/confirmer?idDemande=MDFGDZRF&idGreco=538593&nbconfirmation=2',
+            status=200,
+            json={
+                'iddemande': 'MDFGDZRF',
+                'idgreco': '538593',
+                'motifsrejet': None,
+            },
+        )
+        resp = app.post_json(
+            url, params={'idgreco': '538593', 'iddemande': 'MDFGDZRF', 'nbconfirmation': '2'}
+        )
+
+    assert not resp.json['err']
+    assert resp.json['data'] == {
+        'iddemande': 'MDFGDZRF',
+        'idgreco': '538593',
+        'motifsrejet': None,
+    }
+
+
 @mock.patch('passerelle.utils.Request.post', side_effect=(TOKEN, ADD_CONFIRMATION_KO))
 def test_greco_add_confirmation_ko(mocked_post, app, conn):
     url = reverse(
@@ -451,3 +757,49 @@ def test_greco_add_confirmation_ko(mocked_post, app, conn):
         'idgreco': None,
         'motifsrejet': 'Le nombre de confirmation doit être un entier\\r\\n',
     }
+
+
+def test_greco_rest_no_json_err(app, rest_conn):
+    url = reverse(
+        'generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'status', 'slug': rest_conn.slug}
+    )
+    url += '?apikey=grecokey'
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.get(
+            'http://greco.example.net/consulter?iddemande=MDFGDZRF&idgreco=538593',
+            status=200,
+            content_type='text/html; charset=utf-8',
+            body='some error',
+        )
+        resp = app.get(url, params={'idgreco': '538593', 'iddemande': 'MDFGDZRF'})
+
+    assert resp.json['err'] == 1
+    assert resp.json['err_desc'] == 'some error'
+
+
+def test_greco_rest_bad_json_err(app, rest_conn):
+    url = reverse(
+        'generic-endpoint', kwargs={'connector': 'greco', 'endpoint': 'ping', 'slug': rest_conn.slug}
+    )
+    url += '?apikey=grecokey'
+    with responses.RequestsMock() as rsps:
+        rsps.post(
+            'http://greco.example.net/token',
+            status=200,
+            body=get_json_file('token'),
+        )
+        rsps.get(
+            'http://greco.example.net/communicationTest/ping',
+            status=200,
+            content_type='application/json;charset=UTF-8',
+            body='{reponse:"Test de communication ok : ping"}',
+        )
+        resp = app.get(url)
+
+    assert resp.json['err'] == 1
+    assert resp.json['data']['response_text'] == '{reponse:"Test de communication ok : ping"}'
diff --git a/tox.ini b/tox.ini
index 33d96511..d063f8bf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -44,6 +44,7 @@ deps =
   phonenumbers
   dnspython
   pyquery
+  requests_toolbelt
   responses
   zeep<3.3
   codestyle: pre-commit