diff --git a/graphinder/pool/detectors.py b/graphinder/pool/detectors.py
index 06b7ff5..dbc42ed 100644
--- a/graphinder/pool/detectors.py
+++ b/graphinder/pool/detectors.py
@@ -238,8 +238,9 @@ async def detect(self) -> Tuple[bool, bool]:
 
 
 async def is_gql_endpoint(
-    session: aiohttp.ClientSession,
     url: str,
+    session: Optional[aiohttp.ClientSession] = None,
+    headers: Optional[Dict] = None,
     logger: Optional[logging.Logger] = None,
 ) -> Tuple[bool, bool]:
     """Check if the given url seems to be GraphQL endpoint.
@@ -254,9 +255,26 @@ async def is_gql_endpoint(
         bool: True if the authentication is valid, False otherwise.
     """
 
+    assert url and url.startswith('http'), 'Only http(s) urls are supported'
+
+    headers = headers or {}
+
+    # Open new session if necessary
+    has_opened_new_session = False
+    if not session:
+        session = aiohttp.ClientSession(headers=headers)
+        has_opened_new_session = True
+    else:
+        assert isinstance(session, aiohttp.ClientSession), 'Valid session must be provided'
+
     detector = GraphQLEndpointDetector(
         session,
         url,
         logger,
     )
-    return await detector.detect()
+
+    status = await detector.detect()
+
+    if headers and has_opened_new_session:
+        await session.close()
+    return status
diff --git a/graphinder/pool/domain.py b/graphinder/pool/domain.py
index 4241839..940c07f 100644
--- a/graphinder/pool/domain.py
+++ b/graphinder/pool/domain.py
@@ -85,6 +85,6 @@ async def fetch_endpoint(
 
         self.logger.debug(f'fetching endpoint {url}...')
 
-        if (await is_gql_endpoint(self.session, url))[0]:
+        if (await is_gql_endpoint(url, session=self.session))[0]:
             self.logger.info(f'found GQL endpoint {url}.')
             self.results.add(Url(url))
diff --git a/pyproject.toml b/pyproject.toml
index 107794e..bd51050 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "graphinder"
-version = "1.10.0"
+version = "1.11.0"
 description = "Escape Graphinder"
 authors = ["Escape Technologies SAS <ping@escape.tech>"]
 maintainers = [
diff --git a/tests/unit/pool/test_detectors.py b/tests/unit/pool/test_detectors.py
index cb68b79..e43aecc 100644
--- a/tests/unit/pool/test_detectors.py
+++ b/tests/unit/pool/test_detectors.py
@@ -19,5 +19,11 @@ async def test_is_gql_endpoint() -> None:
 
     async with aiohttp.ClientSession() as session:
 
-        assert not (await is_gql_endpoint(session, 'https://example.com'))[0]
-        assert (await is_gql_endpoint(session, 'https://gontoz.escape.tech'))[0]
+        assert not (await is_gql_endpoint(
+            'https://example.com',
+            session=session,
+        ))[0]
+        assert (await is_gql_endpoint(
+            'https://gontoz.escape.tech',
+            session=session,
+        ))[0]