diff --git a/CHANGELOG.md b/CHANGELOG.md
index edef0812..94ff08db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## 2.1.2
 
-**Date** - 09/23/2025
+**Date** - 10/16/2025
 
 **Release Tag** - [py2.1.2](https://github.com/datacommonsorg/api-python/releases/tag/py2.1.2)
 
diff --git a/datacommons_client/__init__.py b/datacommons_client/__init__.py
index 939053c4..0cfde7b7 100644
--- a/datacommons_client/__init__.py
+++ b/datacommons_client/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "2.1.2rc1"
+__version__ = "2.1.2"
 """
 Data Commons Client Package
 
diff --git a/datacommons_client/endpoints/base.py b/datacommons_client/endpoints/base.py
index d7489f67..a6943d61 100644
--- a/datacommons_client/endpoints/base.py
+++ b/datacommons_client/endpoints/base.py
@@ -1,8 +1,6 @@
 import re
 from typing import Any, Dict, Optional
 
-from datacommons_client.utils.error_handling import InvalidSurfaceHeaderValueError
-from datacommons_client.utils.error_handling import VALID_SURFACE_HEADER_VALUES
 from datacommons_client.utils.request_handling import check_instance_is_valid
 from datacommons_client.utils.request_handling import post_request
 from datacommons_client.utils.request_handling import resolve_instance_url
@@ -52,15 +50,6 @@ def __init__(
       # Resolve from dc_instance
       self.base_url = resolve_instance_url(dc_instance)
 
-    # if this call originates from another DC product (MCP server, DataGemma, etc.), we indicate that to Mixer
-    # otherwise, the 'x-surface' header is 'clientlib-python'
-    if surface_header_value:
-      # use patterns to support tags like mcp-{VERSION}
-      if not any(
-          re.fullmatch(pattern, surface_header_value)
-          for pattern in VALID_SURFACE_HEADER_VALUES):
-        raise InvalidSurfaceHeaderValueError
-
     self.headers = self.build_headers(surface_header_value=surface_header_value,
                                       api_key=api_key)
 
diff --git a/datacommons_client/tests/endpoints/test_base.py b/datacommons_client/tests/endpoints/test_base.py
index 2ee1c2a7..5fb63f35 100644
--- a/datacommons_client/tests/endpoints/test_base.py
+++ b/datacommons_client/tests/endpoints/test_base.py
@@ -4,7 +4,6 @@
 
 from datacommons_client.endpoints.base import API
 from datacommons_client.endpoints.base import Endpoint
-from datacommons_client.utils.error_handling import InvalidSurfaceHeaderValueError
 
 
 @patch(
@@ -63,7 +62,7 @@ def test_api_initialization_with_dc_instance(mock_resolve_instance_url):
     return_value="https://custom-instance/api/v2",
 )
 def test_api_initialization_with_surface_header(mock_url):
-  """Tests API initialization with an invalid surface header raises an InvalidSurfaceHeaderValueError."""
+  """Tests API initialization with a surface header """
   api = API(dc_instance="custom-instance", surface_header_value="mcp-1.1.0")
   assert api.headers == {
       "Content-Type": "application/json",
@@ -77,16 +76,6 @@ def test_api_initialization_invalid_args():
     API(dc_instance="custom-instance", url="https://custom.api/v2")
 
 
-@patch(
-    "datacommons_client.endpoints.base.resolve_instance_url",
-    return_value="https://custom-instance/api/v2",
-)
-def test_api_initialization_invalid_surface(mock_url):
-  """Tests API initialization with an invalid surface header raises an InvalidSurfaceHeaderValueError."""
-  with pytest.raises(InvalidSurfaceHeaderValueError):
-    API(dc_instance="custom-instance", surface_header_value="not mcp")
-
-
 @patch(
     "datacommons_client.endpoints.base.resolve_instance_url",
     return_value="https://custom-instance/api/v2",
diff --git a/datacommons_client/utils/error_handling.py b/datacommons_client/utils/error_handling.py
index 4bfb9d7e..4a7f89ce 100644
--- a/datacommons_client/utils/error_handling.py
+++ b/datacommons_client/utils/error_handling.py
@@ -87,14 +87,3 @@ class NoDataForPropertyError(DataCommonsError):
   """Raised when there is no data that meets the specified property filters."""
 
   default_message = "No available data for the specified property filters."
-
-
-VALID_SURFACE_HEADER_VALUES = ["mcp", r"mcp-[\d\.]+", "datagemma"]
-
-
-class InvalidSurfaceHeaderValueError(DataCommonsError):
-  """ 
-    The surface header value must be a surface known to the Data Commons team.
-    This value is used in the DC usage logs in Mixer.
-  """
-  default_message = "The surface header value should only to indicate a call made from Data Commons surfaces like the MCP server or DataGemma."