diff --git a/sympasoap/client.py b/sympasoap/client.py
new file mode 100644
index 0000000..9982ad8
--- /dev/null
+++ b/sympasoap/client.py
@@ -0,0 +1,28 @@
+from zeep.client import Client as ZeepClient, Settings as ZeepSettings
+
+
+class Client:
+    def __init__(self, sympa_url: str):
+        self.sympa_url = sympa_url
+        self.zeep = ZeepClient(sympa_url + "/wsgl", settings=ZeepSettings(strict=False))
+
+    def login(self, email, password):
+        """
+        Login into the API. Set a cookie for future connexions.
+        """
+        result = self.zeep.service.login(email, password)
+        element = result._raw_elements[0]
+        self.cookie = element.text
+        self.zeep.settings.extra_http_headers = [("Cookie", f"sympa_session={element.text}")]
+        if self.checkCookie() != email:
+            # FIXME Better exception
+            raise Exception("Unknown error: given cookie is invalid")
+        print("Successfully authenticated!")
+
+    def checkCookie(self):
+        """
+        From the current cookie, retrieve the email address.
+        """
+        result = self.zeep.service.checkCookie()
+        element = result._raw_elements[0]
+        return element.text