diff --git a/providers/http/src/airflow/providers/http/operators/http.py b/providers/http/src/airflow/providers/http/operators/http.py
index ee03180881b80..2c7f260f39e12 100644
--- a/providers/http/src/airflow/providers/http/operators/http.py
+++ b/providers/http/src/airflow/providers/http/operators/http.py
@@ -22,13 +22,14 @@
 from collections.abc import Sequence
 from typing import TYPE_CHECKING, Any, Callable
 
+from aiohttp import BasicAuth
 from requests import Response
 
 from airflow.configuration import conf
 from airflow.exceptions import AirflowException
 from airflow.hooks.base import BaseHook
 from airflow.models import BaseOperator
-from airflow.providers.http.triggers.http import HttpTrigger
+from airflow.providers.http.triggers.http import HttpTrigger, serialize_auth_type
 from airflow.utils.helpers import merge_dicts
 
 if TYPE_CHECKING:
@@ -122,7 +123,7 @@ def __init__(
         request_kwargs: dict[str, Any] | None = None,
         http_conn_id: str = "http_default",
         log_response: bool = False,
-        auth_type: type[AuthBase] | None = None,
+        auth_type: type[AuthBase] | type[BasicAuth] | None = None,
         tcp_keep_alive: bool = True,
         tcp_keep_alive_idle: int = 120,
         tcp_keep_alive_count: int = 20,
@@ -221,7 +222,7 @@ def execute_async(self, context: Context) -> None:
         self.defer(
             trigger=HttpTrigger(
                 http_conn_id=self.http_conn_id,
-                auth_type=self.auth_type,
+                auth_type=serialize_auth_type(self._resolve_auth_type()),
                 method=self.method,
                 endpoint=self.endpoint,
                 headers=self.headers,
@@ -231,6 +232,27 @@ def execute_async(self, context: Context) -> None:
             method_name="execute_complete",
         )
 
+    def _resolve_auth_type(self) -> type[AuthBase] | type[BasicAuth] | None:
+        """
+        Resolve the authentication type for the HTTP request.
+
+        If auth_type is not explicitly set, attempt to infer it from the connection configuration.
+        For connections with login/password, default to BasicAuth.
+
+        :return: The resolved authentication type class, or None if no auth is needed.
+        """
+        if self.auth_type is not None:
+            return self.auth_type
+
+        try:
+            conn = BaseHook.get_connection(self.http_conn_id)
+            if conn.login or conn.password:
+                return BasicAuth
+        except Exception as e:
+            self.log.warning("Failed to resolve auth type from connection: %s", e)
+
+        return None
+
     def process_response(self, context: Context, response: Response | list[Response]) -> Any:
         """Process the response."""
         from airflow.utils.operator_helpers import determine_kwargs
@@ -291,7 +313,7 @@ def paginate_async(
             self.defer(
                 trigger=HttpTrigger(
                     http_conn_id=self.http_conn_id,
-                    auth_type=self.auth_type,
+                    auth_type=serialize_auth_type(self._resolve_auth_type()),
                     method=self.method,
                     **self._merge_next_page_parameters(next_page_params),
                 ),
diff --git a/providers/http/src/airflow/providers/http/triggers/http.py b/providers/http/src/airflow/providers/http/triggers/http.py
index d25d3a55cfb5b..6c1d13b136334 100644
--- a/providers/http/src/airflow/providers/http/triggers/http.py
+++ b/providers/http/src/airflow/providers/http/triggers/http.py
@@ -20,6 +20,7 @@
 import base64
 import pickle
 from collections.abc import AsyncIterator
+from importlib import import_module
 from typing import TYPE_CHECKING, Any
 
 import aiohttp
@@ -35,6 +36,21 @@
     from aiohttp.client_reqrep import ClientResponse
 
 
+def serialize_auth_type(auth: str | type | None) -> str | None:
+    if auth is None:
+        return None
+    if isinstance(auth, str):
+        return auth
+    return f"{auth.__module__}.{auth.__qualname__}"
+
+
+def deserialize_auth_type(path: str | None) -> type | None:
+    if path is None:
+        return None
+    module_path, cls_name = path.rsplit(".", 1)
+    return getattr(import_module(module_path), cls_name)
+
+
 class HttpTrigger(BaseTrigger):
     """
     HttpTrigger run on the trigger worker.
@@ -56,7 +72,7 @@ class HttpTrigger(BaseTrigger):
     def __init__(
         self,
         http_conn_id: str = "http_default",
-        auth_type: Any = None,
+        auth_type: str | None = None,
         method: str = "POST",
         endpoint: str | None = None,
         headers: dict[str, str] | None = None,
@@ -66,7 +82,7 @@ def __init__(
         super().__init__()
         self.http_conn_id = http_conn_id
         self.method = method
-        self.auth_type = auth_type
+        self.auth_type = deserialize_auth_type(auth_type)
         self.endpoint = endpoint
         self.headers = headers
         self.data = data
@@ -79,7 +95,7 @@ def serialize(self) -> tuple[str, dict[str, Any]]:
             {
                 "http_conn_id": self.http_conn_id,
                 "method": self.method,
-                "auth_type": self.auth_type,
+                "auth_type": serialize_auth_type(self.auth_type),
                 "endpoint": self.endpoint,
                 "headers": self.headers,
                 "data": self.data,
diff --git a/providers/http/tests/unit/http/operators/test_http.py b/providers/http/tests/unit/http/operators/test_http.py
index 82787cb54304c..31be860cef6c0 100644
--- a/providers/http/tests/unit/http/operators/test_http.py
+++ b/providers/http/tests/unit/http/operators/test_http.py
@@ -21,18 +21,21 @@
 import contextlib
 import json
 import pickle
+from types import SimpleNamespace
 from unittest import mock
 from unittest.mock import call, patch
 
 import pytest
 import tenacity
+from aiohttp import BasicAuth
 from requests import Response
 from requests.models import RequestEncodingMixin
 
 from airflow.exceptions import AirflowException, TaskDeferred
+from airflow.hooks import base
 from airflow.providers.http.hooks.http import HttpHook
 from airflow.providers.http.operators.http import HttpOperator
-from airflow.providers.http.triggers.http import HttpTrigger
+from airflow.providers.http.triggers.http import HttpTrigger, serialize_auth_type
 
 
 @mock.patch.dict("os.environ", AIRFLOW_CONN_HTTP_EXAMPLE="http://www.example.com")
@@ -92,6 +95,7 @@ def test_filters_response(self, requests_mock):
         result = operator.execute({})
         assert result == {"value": 5}
 
+    @pytest.mark.db_test
     def test_async_defer_successfully(self, requests_mock):
         operator = HttpOperator(
             task_id="test_HTTP_op",
@@ -186,6 +190,7 @@ def pagination_function(response: Response) -> dict | None:
 
         assert result == [5, 10]
 
+    @pytest.mark.db_test
     def test_async_pagination(self, requests_mock):
         """
         Test that the HttpOperator calls asynchronously and repetitively
@@ -300,3 +305,53 @@ def pagination_function(response: Response) -> dict | None:
         )
 
         assert mock_run_with_advanced_retry.call_count == 2
+
+    def _capture_defer(self, monkeypatch):
+        captured = {}
+
+        def _fake_defer(self, *, trigger, method_name, **kwargs):
+            captured["trigger"] = trigger
+            captured["kwargs"] = kwargs
+
+        monkeypatch.setattr(HttpOperator, "defer", _fake_defer)
+        return captured
+
+    @pytest.mark.parametrize(
+        "login, password, auth_type, expect_cls",
+        [
+            ("user", "password", None, BasicAuth),
+            (None, None, None, type(None)),
+            ("user", "password", BasicAuth, BasicAuth),
+        ],
+    )
+    def test_auth_type_is_serialised_as_string(self, monkeypatch, login, password, auth_type, expect_cls):
+        monkeypatch.setattr(
+            base.BaseHook, "get_connection", lambda _cid: SimpleNamespace(login=login, password=password)
+        )
+        captured = self._capture_defer(monkeypatch)
+
+        HttpOperator(task_id="test_HTTP_op", deferrable=True, auth_type=auth_type).execute(context={})
+
+        trigger = captured["trigger"]
+        kwargs = captured["trigger"].serialize()[1]
+
+        expected_str = serialize_auth_type(expect_cls) if expect_cls is not type(None) else None
+        assert kwargs["auth_type"] == expected_str
+
+        assert trigger.auth_type == expect_cls or (trigger.auth_type is None and expect_cls is type(None))
+
+    def test_resolve_auth_type_variants(self, monkeypatch):
+        monkeypatch.setattr(
+            base.BaseHook, "get_connection", lambda _cid: SimpleNamespace(login="user", password="password")
+        )
+        assert HttpOperator(task_id="test_HTTP_op_1")._resolve_auth_type() is BasicAuth
+
+        class DummyAuth:
+            def __init__(self, *_, **__): ...
+
+        assert HttpOperator(task_id="test_HTTP_op_2", auth_type=DummyAuth)._resolve_auth_type() is DummyAuth
+
+        monkeypatch.setattr(
+            base.BaseHook, "get_connection", lambda _cid: SimpleNamespace(login=None, password=None)
+        )
+        assert HttpOperator(task_id="test_HTTP_op_3")._resolve_auth_type() is None