diff --git a/meta_ads_mcp/__init__.py b/meta_ads_mcp/__init__.py
index bcbae37a..9134c0d7 100644
--- a/meta_ads_mcp/__init__.py
+++ b/meta_ads_mcp/__init__.py
@@ -6,7 +6,7 @@
 
 from meta_ads_mcp.core.server import main
 
-__version__ = "1.0.113"
+__version__ = "1.0.114"
 
 __all__ = [
     'get_ad_accounts',
diff --git a/meta_ads_mcp/core/http_auth_integration.py b/meta_ads_mcp/core/http_auth_integration.py
index cfc9cc8a..d5684f77 100644
--- a/meta_ads_mcp/core/http_auth_integration.py
+++ b/meta_ads_mcp/core/http_auth_integration.py
@@ -256,12 +256,15 @@ async def dispatch(self, request: Request, call_next):
         auth_token = FastMCPAuthIntegration.extract_token_from_headers(dict(request.headers))
         pipeboard_token = FastMCPAuthIntegration.extract_pipeboard_token_from_headers(dict(request.headers))
 
-        if not auth_token and not pipeboard_token:
-            # Reject unauthenticated requests. Without this, the request would fall
-            # through to tool handlers which transparently use the META_ACCESS_TOKEN
-            # env var, allowing any network-reachable caller to invoke tools and
-            # exfiltrate the operator's credential via Graph API error responses.
-            # See GHSA-9gw6-46qc-99vr.
+        if not auth_token:
+            # A request must carry a primary access-token credential: an
+            # Authorization: Bearer header, X-META-ACCESS-TOKEN, or
+            # X-PIPEBOARD-API-TOKEN (all resolved by extract_token_from_headers).
+            # X-Pipeboard-Token is only a supplementary service token for the
+            # duplication callback — on its own it establishes no request auth
+            # context, so it must not admit a request. Otherwise the request
+            # would fall through to tool handlers that use the META_ACCESS_TOKEN
+            # env var. See GHSA-9gw6-46qc-99vr.
             logger.warning(
                 "HTTP Auth Middleware: rejecting request to %s — no Authorization "
                 "Bearer or X-PIPEBOARD-API-TOKEN header present", request.url.path,
diff --git a/pyproject.toml b/pyproject.toml
index d971d4fd..9e964f7b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "meta-ads-mcp"
-version = "1.0.113"
+version = "1.0.114"
 description = "Model Context Protocol (MCP) server for Meta Ads - Use Remote MCP at pipeboard.co for easiest setup"
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/server.json b/server.json
index bf95fd52..cc3b081f 100644
--- a/server.json
+++ b/server.json
@@ -2,7 +2,7 @@
   "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
   "name": "co.pipeboard/meta-ads-mcp",
   "description": "Facebook / Meta Ads automation with AI: analyze performance, test creatives, optimize spend.",
-  "version": "1.0.113",
+  "version": "1.0.114",
   "remotes": [
     {
       "type": "streamable-http",
diff --git a/tests/test_http_auth_security.py b/tests/test_http_auth_security.py
index 5791f61f..afd1fb09 100644
--- a/tests/test_http_auth_security.py
+++ b/tests/test_http_auth_security.py
@@ -70,6 +70,38 @@ def test_middleware_accepts_pipeboard_token():
     assert resp.status_code == 200
 
 
+def test_middleware_rejects_supplementary_token_alone():
+    """X-Pipeboard-Token is a supplementary service token (duplication
+    callback) and must not, on its own, admit a request — without a primary
+    access-token credential the request must be rejected with 401."""
+    client = TestClient(_build_app())
+    resp = client.post(
+        "/mcp",
+        json={"jsonrpc": "2.0", "method": "tools/list", "id": 1},
+        headers={"X-Pipeboard-Token": "anything-not-validated"},
+    )
+    assert resp.status_code == 401
+    assert resp.headers.get("WWW-Authenticate") == "Bearer"
+    assert resp.json()["error"] == "Unauthorized"
+    assert "reached_handler" not in resp.text
+
+
+def test_middleware_accepts_supplementary_token_with_primary_credential():
+    """The legitimate flow forwards X-Pipeboard-Token alongside a primary
+    credential; the request must still be admitted."""
+    client = TestClient(_build_app())
+    resp = client.post(
+        "/mcp",
+        json={"jsonrpc": "2.0", "method": "tools/list", "id": 1},
+        headers={
+            "Authorization": "Bearer some-meta-token-value-xyz",
+            "X-Pipeboard-Token": "pb-supplementary-token",
+        },
+    )
+    assert resp.status_code == 200
+    assert resp.json() == {"reached_handler": True}
+
+
 def test_redact_url_strips_access_token():
     url = (
         "https://graph.facebook.com/v24.0/me/adaccounts"