diff --git a/src/langsmith/api-ref-control-plane.mdx b/src/langsmith/api-ref-control-plane.mdx
index 829c6a40a8..1b753bc048 100644
--- a/src/langsmith/api-ref-control-plane.mdx
+++ b/src/langsmith/api-ref-control-plane.mdx
@@ -21,7 +21,7 @@ The control plane hosts for Cloud data regions:
 
 ## Authentication
 
-To authenticate with the control plane API, set the `X-Api-Key` header to a valid LangSmith API key.
+To authenticate with the control plane API, set the `X-Api-Key` header to a valid LangSmith API key and set the `X-Tenant-Id` header to a valid workspace ID to target.
 
 Example `curl` command:
 
@@ -29,6 +29,7 @@ Example `curl` command:
 curl --request GET \
   --url http://localhost:8124/v2/deployments \
   --header 'X-Api-Key: LANGSMITH_API_KEY'
+  --header 'X-Tenant-Id': WORKSPACE_ID'
 ```
 
 ## Versioning
@@ -59,6 +60,7 @@ load_dotenv()
 # required environment variables
 CONTROL_PLANE_HOST = os.getenv("CONTROL_PLANE_HOST")
 LANGSMITH_API_KEY = os.getenv("LANGSMITH_API_KEY")
+WORKSPACE_ID = os.getenv("WORKSPACE_ID")
 INTEGRATION_ID = os.getenv("INTEGRATION_ID")
 MAX_WAIT_TIME = 1800  # 30 mins
 
@@ -67,6 +69,7 @@ def get_headers() -> dict:
     """Return common headers for requests to the control plane API."""
     return {
         "X-Api-Key": LANGSMITH_API_KEY,
+        "X-Tenant-Id": WORKSPACE_ID,
     }