diff --git a/rm_extra_data/__init__.py b/rm_extra_data/__init__.py
index 0b70eb3..2dcbd82 100644
--- a/rm_extra_data/__init__.py
+++ b/rm_extra_data/__init__.py
@@ -4,6 +4,9 @@
 from . import stock
 from . import product
 from . import invoice
+from . import routes
+
+__all__ = ['register', 'routes']
 
 def register():
     Pool.register(
diff --git a/rm_extra_data/party.py b/rm_extra_data/party.py
index 6e9c9c2..62b1d39 100644
--- a/rm_extra_data/party.py
+++ b/rm_extra_data/party.py
@@ -77,6 +77,42 @@ def copy(cls, parties, default=None):
         default.setdefault('dolibarr_cid', None)
         return super().copy(parties, default=default)
 
+    def to_vcard(self):
+        vclines = ['BEGIN:VCARD', 'VERSION:4.0']
+        if self.legal_name and self.legal_name.strip():
+             # our internal names sometimes are shortened for convenience so use legal_name
+            vclines.append(f'FN:{self.legal_name.strip()}')
+        else:
+            vclines.append(f'FN:{self.name.strip()}')
+        for ad in self.addresses:
+            # TODO: do we want to add subdivision ?
+            street = ad.street.strip().replace("\n", "\\n") # fstring expression part cannot include backslash
+            vclines.append(f'ADR:;;{street};{ad.city.strip() if ad.city else ""};{ad.postal_code.strip() if ad.postal_code else ""};{ad.subdivision.name.strip() if ad.subdivision and ad.subdivision.name.strip() else ""};{ad.country.name.strip() if ad.country and ad.country.name else ""}')
+        for cm in self.contact_mechanisms:
+            # phone number types according to RFC6350:
+            # https://www.rfc-editor.org/rfc/rfc6350.html#section-6.4.1
+            if cm.type == 'phone':
+                vclines.append(f'TEL;TYPE=voice:{cm.value}')
+            elif cm.type == 'mobile':
+                vclines.append(f'TEL;TYPE=cell:{cm.value}')
+            elif cm.type == 'fax':
+                vclines.append(f'TEL;TYPE=fax:{cm.value}')
+            elif cm.type == 'email':
+                # types WORK and HOME
+                # https://www.rfc-editor.org/rfc/rfc6350.html#section-6.4.2
+                # setting no type since there is no standard way to differenciate between home and work
+                vclines.append(f'EMAIL:{cm.value}')
+            elif cm.type == 'website':
+                pass
+            elif cm.type in ('skype', 'sip', 'irc', 'jabber'):
+                vclines.append(f'IMPP;{cm.type}:{cm.value}')
+            elif cm.type == 'other':
+                pass
+            else:
+                pass
+        vclines.append('END:VCARD')
+        return '\n'.join(vclines)
+
 
 class Replace(metaclass=PoolMeta):
     __name__ = 'party.replace'
diff --git a/rm_extra_data/routes.py b/rm_extra_data/routes.py
new file mode 100644
index 0000000..d9e8247
--- /dev/null
+++ b/rm_extra_data/routes.py
@@ -0,0 +1,18 @@
+from trytond.protocols.wrappers import (
+    HTTPStatus, Response, abort, with_pool, with_transaction)
+from trytond.pool import Pool
+from trytond.wsgi import app
+
+def create_carddav():
+    pool = Pool()
+    Party = pool.get('party.party')
+    ret = ''
+    for p in Party.search([]):
+        ret += p.to_vcard()
+    return ret
+
+@app.route('/<database_name>/party/carddav', methods = {'GET'})
+@with_pool
+@with_transaction()
+def vcards(request, pool):
+    return Response(create_carddav(), content_type='text/vcard')