diff --git a/saasus_sdk_python/.DS_Store b/saasus_sdk_python/.DS_Store
new file mode 100644
index 0000000..cadbfcd
Binary files /dev/null and b/saasus_sdk_python/.DS_Store differ
diff --git a/saasus_sdk_python/__main__.py b/saasus_sdk_python/__main__.py
index ea1c88b..a499d63 100644
--- a/saasus_sdk_python/__main__.py
+++ b/saasus_sdk_python/__main__.py
@@ -49,7 +49,8 @@ def fastapi_auth(request: Request) -> Union[dict, HTTPException]:
     auth_header = request.headers.get("Authorization", "")
     token = auth_header.replace("Bearer ", "") if "Bearer " in auth_header else ""
     referer = request.headers.get("Referer", "")
-    user_info, error = auth.authenticate(id_token=token, referer=referer)
+    x_saasus_trace_id = request.headers.get("X-SaaSus-Trace-Id", "")
+    user_info, error = auth.authenticate(id_token=token, referer=referer, x_saasus_trace_id=x_saasus_trace_id)
     if error:
         raise HTTPException(status_code=401, detail=str(error))
     return user_info
diff --git a/saasus_sdk_python/client/apilog_client.py b/saasus_sdk_python/client/apilog_client.py
index 957c65a..5089300 100644
--- a/saasus_sdk_python/client/apilog_client.py
+++ b/saasus_sdk_python/client/apilog_client.py
@@ -6,12 +6,13 @@
 
 class SignedApilogApiClient(ApiClient):
 
-    def __init__(self, referer=None, x_saasus_referer=None, *args, **kwargs):
+    def __init__(self, referer=None, x_saasus_referer=None, x_saasus_trace_id=None, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.client = Client()
         self.configuration.default_headers = {}
         self.client.referer = referer
         self.client.x_saasus_referer = x_saasus_referer
+        self.client.x_saasus_trace_id = x_saasus_trace_id
         self.base_url = os.getenv("SAASUS_BASE_URL", "https://api.saasus.io/v1")
 
     def call_api(self, resource_path, method,
diff --git a/saasus_sdk_python/client/auth_client.py b/saasus_sdk_python/client/auth_client.py
index 600a11d..7275ac9 100644
--- a/saasus_sdk_python/client/auth_client.py
+++ b/saasus_sdk_python/client/auth_client.py
@@ -6,10 +6,11 @@
 
 class SignedAuthApiClient(ApiClient):
 
-    def __init__(self, referer=None, x_saasus_referer=None, *args, **kwargs):
+    def __init__(self, referer=None, x_saasus_referer=None, x_saasus_trace_id=None, *args, **kwargs):
         self.client = Client()
         self.client.referer = referer
         self.client.x_saasus_referer = x_saasus_referer
+        self.client.x_saasus_trace_id = x_saasus_trace_id
         self.base_url = os.getenv("SAASUS_BASE_URL", "https://api.saasus.io/v1")
         super().__init__(*args, **kwargs)
 
diff --git a/saasus_sdk_python/client/awsmarketplace_client.py b/saasus_sdk_python/client/awsmarketplace_client.py
index dec07e8..490f72e 100644
--- a/saasus_sdk_python/client/awsmarketplace_client.py
+++ b/saasus_sdk_python/client/awsmarketplace_client.py
@@ -6,12 +6,13 @@
 
 class SignedAwsmarketplaceApiClient(ApiClient):
 
-    def __init__(self, referer=None, x_saasus_referer=None, *args, **kwargs):
+    def __init__(self, referer=None, x_saasus_referer=None, x_saasus_trace_id=None, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.client = Client()
         self.configuration.default_headers = {}
         self.client.referer = referer
         self.client.x_saasus_referer = x_saasus_referer
+        self.client.x_saasus_trace_id = x_saasus_trace_id
         self.base_url = os.getenv("SAASUS_BASE_URL", "https://api.saasus.io/v1")
 
     def call_api(self, resource_path, method,
diff --git a/saasus_sdk_python/client/billing_client.py b/saasus_sdk_python/client/billing_client.py
index 2a53344..1f38baf 100644
--- a/saasus_sdk_python/client/billing_client.py
+++ b/saasus_sdk_python/client/billing_client.py
@@ -6,12 +6,13 @@
 
 class SignedBillingApiClient(ApiClient):
 
-    def __init__(self, referer=None, x_saasus_referer=None, *args, **kwargs):
+    def __init__(self, referer=None, x_saasus_referer=None, x_saasus_trace_id=None, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.client = Client()
         self.configuration.default_headers = {}
         self.client.referer = referer
         self.client.x_saasus_referer = x_saasus_referer
+        self.client.x_saasus_trace_id = x_saasus_trace_id
         self.base_url = os.getenv("SAASUS_BASE_URL", "https://api.saasus.io/v1")
 
     def call_api(self, resource_path, method,
diff --git a/saasus_sdk_python/client/client.py b/saasus_sdk_python/client/client.py
index e0c2721..3577189 100644
--- a/saasus_sdk_python/client/client.py
+++ b/saasus_sdk_python/client/client.py
@@ -26,6 +26,7 @@ def __new__(cls):
             cls._instance = super().__new__(cls)
             cls._instance.referer = None
             cls._instance.x_saasus_referer = None
+            cls._instance.x_saasus_trace_id = None
             cls._instance.api_key = os.getenv("SAASUS_API_KEY", "")
             cls._instance.secret_key = os.getenv("SAASUS_SECRET_KEY", "")
             cls._instance.saas_id = os.getenv("SAASUS_SAAS_ID", "")
@@ -55,4 +56,6 @@ def set_referer_header(self, header_params: dict) -> dict:
             header_params["Referer"] = self.referer
         if self.x_saasus_referer:
             header_params["X-SaaSus-Referer"] = self.x_saasus_referer
+        if self.x_saasus_trace_id:
+            header_params["X-SaaSus-Trace-Id"] = self.x_saasus_trace_id
         return header_params
diff --git a/saasus_sdk_python/client/communication_client.py b/saasus_sdk_python/client/communication_client.py
index a65bf59..c6eb42f 100644
--- a/saasus_sdk_python/client/communication_client.py
+++ b/saasus_sdk_python/client/communication_client.py
@@ -6,12 +6,13 @@
 
 class SignedCommunicationApiClient(ApiClient):
 
-    def __init__(self, referer=None, x_saasus_referer=None, *args, **kwargs):
+    def __init__(self, referer=None, x_saasus_referer=None, x_saasus_trace_id=None, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.client = Client()
         self.configuration.default_headers = {}
         self.client.referer = referer
         self.client.x_saasus_referer = x_saasus_referer
+        self.client.x_saasus_trace_id = x_saasus_trace_id
         self.base_url = os.getenv("SAASUS_BASE_URL", "https://api.saasus.io/v1")
 
     def call_api(self, resource_path, method,
diff --git a/saasus_sdk_python/client/integration_client.py b/saasus_sdk_python/client/integration_client.py
index 01e04b2..ac0de2e 100644
--- a/saasus_sdk_python/client/integration_client.py
+++ b/saasus_sdk_python/client/integration_client.py
@@ -6,12 +6,13 @@
 
 class SignedIntegrationApiClient(ApiClient):
 
-    def __init__(self, referer=None, x_saasus_referer=None, *args, **kwargs):
+    def __init__(self, referer=None, x_saasus_referer=None, x_saasus_trace_id=None, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.client = Client()
         self.configuration.default_headers = {}
         self.client.referer = referer
         self.client.x_saasus_referer = x_saasus_referer
+        self.client.x_saasus_trace_id = x_saasus_trace_id
         self.base_url = os.getenv("SAASUS_BASE_URL", "https://api.saasus.io/v1")
 
     def call_api(self, resource_path, method,
diff --git a/saasus_sdk_python/client/pricing_client.py b/saasus_sdk_python/client/pricing_client.py
index 2d89c62..d1af430 100644
--- a/saasus_sdk_python/client/pricing_client.py
+++ b/saasus_sdk_python/client/pricing_client.py
@@ -5,12 +5,13 @@
 
 class SignedPricingApiClient(ApiClient):
 
-    def __init__(self, referer=None, x_saasus_referer=None, *args, **kwargs):
+    def __init__(self, referer=None, x_saasus_referer=None, x_saasus_trace_id=None, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.client = Client()
         self.configuration.default_headers = {}
         self.client.referer = referer
         self.client.x_saasus_referer = x_saasus_referer
+        self.client.x_saasus_trace_id = x_saasus_trace_id
 
     def call_api(self, resource_path, method,
                  path_params=None, query_params=None, header_params=None,
diff --git a/saasus_sdk_python/middleware/middleware.py b/saasus_sdk_python/middleware/middleware.py
index ab64861..8740b5d 100644
--- a/saasus_sdk_python/middleware/middleware.py
+++ b/saasus_sdk_python/middleware/middleware.py
@@ -26,12 +26,13 @@ def __init__(self):
         self.client = Client()
         self.base_url = os.getenv("SAASUS_BASE_URL", "https://api.saasus.io/v1")
 
-    def authenticate(self, id_token: str, referer: str | None = None, x_saasus_referer: str | None = None) -> tuple[None, AuthenticationError] | tuple[UserInfo, None] | tuple[None, ErrorResponse]:  # noqa: E501
+    def authenticate(self, id_token: str, referer: str | None = None, x_saasus_referer: str | None = None, x_saasus_trace_id: str | None = None) -> tuple[None, AuthenticationError] | tuple[UserInfo, None] | tuple[None, ErrorResponse]:  # noqa: E501
         if not id_token:
             return None, AuthenticationError("Invalid Authorization header")
 
         self.client.referer = referer
         self.client.x_saasus_referer = x_saasus_referer
+        self.client.x_saasus_trace_id = x_saasus_trace_id
         try:
             response = self.user_info(id_token)
             return response, None
diff --git a/test/.DS_Store b/test/.DS_Store
new file mode 100644
index 0000000..a5a31a9
Binary files /dev/null and b/test/.DS_Store differ