diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc3e2e8d..fd3d4be0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 ## 1.30.0 [unreleased]
 
+## 1.29.1 [unreleased]
+
+### Bug Fixes
+1. [#443](https://github.com/influxdata/influxdb-client-python/pull/443): Initialization of the client without auth credentials
+
 ## 1.29.0 [2022-05-20]
 
 ### Breaking Changes
diff --git a/influxdb_client/client/_base.py b/influxdb_client/client/_base.py
index 600b4095..307f1d3e 100644
--- a/influxdb_client/client/_base.py
+++ b/influxdb_client/client/_base.py
@@ -72,13 +72,17 @@ def __init__(self, url, token, debug=None, timeout=10_000, enable_gzip=False, or
 
         self.conf.username = kwargs.get('username', None)
         self.conf.password = kwargs.get('password', None)
+        # defaults
+        self.auth_header_name = None
+        self.auth_header_value = None
         # by token
-        self.auth_header_name = "Authorization"
         if self.token:
+            self.auth_header_name = "Authorization"
             self.auth_header_value = "Token " + self.token
         # by HTTP basic
         auth_basic = kwargs.get('auth_basic', False)
         if auth_basic:
+            self.auth_header_name = "Authorization"
             self.auth_header_value = "Basic " + base64.b64encode(token.encode()).decode()
         # by username, password
         if self.conf.username and self.conf.password:
diff --git a/setup.py b/setup.py
index 59b28f51..93703cac 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,8 @@
     'randomize>=0.13',
     'pytest>=5.0.0',
     'httpretty==1.0.5',
-    'psutil>=5.6.3'
+    'psutil>=5.6.3',
+    'aioresponses>=0.7.3'
 ]
 
 extra_requires = [
diff --git a/tests/test_InfluxDBClient.py b/tests/test_InfluxDBClient.py
index b8bcd766..825decf3 100644
--- a/tests/test_InfluxDBClient.py
+++ b/tests/test_InfluxDBClient.py
@@ -4,6 +4,7 @@
 import threading
 import unittest
 
+import httpretty
 import pytest
 from urllib3.exceptions import NewConnectionError, HTTPError
 
@@ -244,6 +245,24 @@ def do_GET(self):
         self.httpd_thread.start()
 
 
+class InfluxDBClientTestMock(unittest.TestCase):
+
+    def setUp(self) -> None:
+        httpretty.enable()
+        httpretty.reset()
+
+    def tearDown(self) -> None:
+        if self.influxdb_client:
+            self.influxdb_client.close()
+        httpretty.disable()
+
+    def test_init_without_token(self):
+        httpretty.register_uri(httpretty.POST, uri="http://localhost/api/v2/query", status=200, body="")
+        self.influxdb_client = InfluxDBClient("http://localhost")
+        self.assertIsNotNone(self.influxdb_client)
+        self.influxdb_client.query_api().query("buckets()", "my-org")
+
+
 class ServerWithSelfSingedSSL(http.server.SimpleHTTPRequestHandler):
     def _set_headers(self):
         self.send_response(200)
diff --git a/tests/test_InfluxDBClientAsync.py b/tests/test_InfluxDBClientAsync.py
index ac7c13bf..fb2ddfce 100644
--- a/tests/test_InfluxDBClientAsync.py
+++ b/tests/test_InfluxDBClientAsync.py
@@ -4,6 +4,7 @@
 from datetime import datetime
 
 import pytest
+from aioresponses import aioresponses
 
 from influxdb_client import Point, WritePrecision
 from influxdb_client.client.exceptions import InfluxDBError
@@ -238,6 +239,14 @@ async def test_username_password_authorization(self):
         self.client = InfluxDBClientAsync(url="http://localhost:8086", username="my-user", password="my-password", debug=True)
         await self.client.query_api().query("buckets()", "my-org")
 
+    @async_test
+    @aioresponses()
+    async def test_init_without_token(self, mocked):
+        mocked.post('http://localhost/api/v2/query?org=my-org', status=200, body='')
+        await self.client.close()
+        self.client = InfluxDBClientAsync("http://localhost")
+        await self.client.query_api().query("buckets()", "my-org")
+
     async def _prepare_data(self, measurement: str):
         _point1 = Point(measurement).tag("location", "Prague").field("temperature", 25.3)
         _point2 = Point(measurement).tag("location", "New York").field("temperature", 24.3)