diff --git a/eox_nelp/api_clients/authenticators.py b/eox_nelp/api_clients/authenticators.py
index 2f2f9932..00ecad77 100644
--- a/eox_nelp/api_clients/authenticators.py
+++ b/eox_nelp/api_clients/authenticators.py
@@ -127,3 +127,37 @@ def authenticate(self, api_client):
         )
 
         return session
+
+
+class Oauth2BasicAuthenticator(BasicAuthAuthenticator):
+    """Authenticator for custom use using basic auth to get a Oauth2 Token (Bearer or JWT).
+    Token_type on depends of the response used after the oauth2 token request.
+    Then the token is used for the next requests.
+    """
+
+    def authenticate(self, api_client):
+        """Authenticate the session with basic auth in order to get token(Bearer or JWT).
+        Then the token is added to a new session Headers.
+        Is needed the user, password and token_path class atrributes to the get oauth2 token,
+        based on the client configuration.
+        """
+        auth_session = super().authenticate(api_client)
+        key = f"oauth2-basic-{api_client.user}-{api_client.password}"
+        headers = cache.get(key)
+
+        if not headers:
+            authenticate_url = f"{api_client.base_url}/{api_client.token_path}"
+            response = auth_session.post(
+                url=authenticate_url,
+                data={"grant_type": "client_credentials", "scope": "notification"}
+            ).json()
+            headers = {
+                "Authorization": f"{response.get('token_type')} {response.get('access_token')}"
+            }
+
+            cache.set(key, headers, int(response.get("expires_in", 300)))
+
+        session = requests.Session()
+        session.headers.update(headers)
+
+        return session
diff --git a/eox_nelp/api_clients/sms_vendor.py b/eox_nelp/api_clients/sms_vendor.py
index 14494db1..9edf3e55 100644
--- a/eox_nelp/api_clients/sms_vendor.py
+++ b/eox_nelp/api_clients/sms_vendor.py
@@ -6,6 +6,7 @@
 from django.conf import settings
 
 from eox_nelp.api_clients import AbstractAPIRestClient
+from eox_nelp.api_clients.authenticators import Oauth2BasicAuthenticator
 
 try:
     from eox_audit_model.decorators import audit_method
@@ -17,11 +18,19 @@ def audit_method(action):  # pylint: disable=unused-argument
 
 class SMSVendorApiClient(AbstractAPIRestClient):
     """Allow to perform SMS send operations."""
+    authentication_class = Oauth2BasicAuthenticator
 
     @property
     def base_url(self):
         return getattr(settings, "SMS_VENDOR_URL")
 
+    def __init__(self):
+        self.user = getattr(settings, "SMS_VENDOR_USERNAME")
+        self.password = getattr(settings, "SMS_VENDOR_PASSWORD")
+        self.token_path = getattr(settings, "SMS_VENDOR_TOKEN_PATH")
+
+        super().__init__()
+
     def send_sms(self, recipient, message):
         """This send SMS using an external Vendor via API.
 
@@ -37,11 +46,8 @@ def send_sms_request(recipient, message):
             """This is a wrapper that allows to make audit-able the send_SMS method."""
             path = getattr(settings, "SMS_VENDOR_SEND_SMS_PATH", "")
             payload = {
-                "message": message,
-                "number": recipient,
-                "username": getattr(settings, "SMS_VENDOR_USERNAME"),
-                "password": getattr(settings, "SMS_VENDOR_PASSWORD"),
-                "sender": getattr(settings, "SMS_VENDOR_MSG_SENDER", "NELC"),
+                "sms_message": message,
+                "recipient_number": recipient,
             }
             return self.make_post(path, payload)
 
diff --git a/eox_nelp/api_clients/tests/test_sms_vendor.py b/eox_nelp/api_clients/tests/test_sms_vendor.py
index 630e9736..ddd97c1f 100644
--- a/eox_nelp/api_clients/tests/test_sms_vendor.py
+++ b/eox_nelp/api_clients/tests/test_sms_vendor.py
@@ -5,8 +5,7 @@
 """
 import unittest
 
-from django.conf import settings
-from mock import patch
+from mock import Mock, patch
 
 from eox_nelp.api_clients.sms_vendor import SMSVendorApiClient
 from eox_nelp.api_clients.tests.mixins import TestRestApiClientMixin
@@ -20,6 +19,7 @@ def setUp(self):
         self.api_class = SMSVendorApiClient
 
     @patch.object(SMSVendorApiClient, "make_post")
+    @patch.object(SMSVendorApiClient, "_authenticate", Mock())
     def test_send_sms(self, post_mock):
         """Test successful post request.
 
@@ -27,21 +27,21 @@ def test_send_sms(self, post_mock):
             - Response is the expected value
         """
         expected_value = {
-            "message": "SMS sent =), waiting what would be this field.",
-            "responseCode": 200,
+            "message": "Operation completed successfully",
+            "transaction_id": "50693df-665d-47e1-affb-01076a83b9023427",
+            "recipient": "+573219990000",
+            "timestamp": "1720220972275"
         }
         post_mock.return_value = expected_value
-        recipient = 3219802890
+        recipient = "+573219990000"
         message = "This is a message to test SMS integration."
         api_client = self.api_class()
         expected_payload = {
-            "message": message,
-            "number": recipient,
-            "username": settings.SMS_VENDOR_USERNAME,
-            "password": settings.SMS_VENDOR_PASSWORD,
-            "sender": settings.SMS_VENDOR_MSG_SENDER,
+            "sms_message": message,
+            "recipient_number": recipient,
         }
+
         response = api_client.send_sms(recipient, message)
 
         self.assertDictEqual(response, expected_value)
-        post_mock.assert_called_once_with("", expected_payload)
+        post_mock.assert_called_once_with("sms/send", expected_payload)
diff --git a/eox_nelp/settings/test.py b/eox_nelp/settings/test.py
index 15ae03c1..542c0f3a 100644
--- a/eox_nelp/settings/test.py
+++ b/eox_nelp/settings/test.py
@@ -53,7 +53,8 @@ def plugin_settings(settings):  # pylint: disable=function-redefined
     settings.SMS_VENDOR_URL = 'https://testing.com'
     settings.SMS_VENDOR_USERNAME = 'test-user'
     settings.SMS_VENDOR_PASSWORD = 'test-password'
-    settings.SMS_VENDOR_MSG_SENDER = 'Nelc-test'
+    settings.SMS_VENDOR_TOKEN_PATH = "oauth2/v1/token"
+    settings.SMS_VENDOR_SEND_SMS_PATH = 'sms/send'
 
     settings.PEARSON_RTI_WSDL_URL = 'https://testing.com'
     settings.PEARSON_RTI_CERT = '/openedx/certs/cert.p12'