diff --git a/sdk/ai/azure-ai-projects/README.md b/sdk/ai/azure-ai-projects/README.md
index 013e8b7d7a1c..8b4860832fe3 100644
--- a/sdk/ai/azure-ai-projects/README.md
+++ b/sdk/ai/azure-ai-projects/README.md
@@ -379,7 +379,7 @@ evaluation_response: Evaluation = project_client.evaluations.create(
     evaluation,
     headers={
         "model-endpoint": model_endpoint,
-        "api-key": model_api_key,
+        "model-api-key": model_api_key,
     },
 )
 print(evaluation_response)
diff --git a/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations.py b/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations.py
index 164d0dc5590a..ce9e5123cae4 100644
--- a/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations.py
+++ b/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations.py
@@ -98,7 +98,7 @@
             evaluation,
             headers={
                 "model-endpoint": model_endpoint,
-                "api-key": model_api_key,
+                "model-api-key": model_api_key,
             },
         )
         print(evaluation_response)
diff --git a/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations_aoai_graders.py b/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations_aoai_graders.py
index 1b193ab971ca..c7db2d182964 100644
--- a/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations_aoai_graders.py
+++ b/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations_aoai_graders.py
@@ -142,7 +142,7 @@
             evaluation,
             headers={
                 "model-endpoint": model_endpoint,
-                "api-key": model_api_key,
+                "model-api-key": model_api_key,
             },
         )
         print(evaluation_response)
diff --git a/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations_async.py b/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations_async.py
index 063ee4d07e33..51c939fb11c2 100644
--- a/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations_async.py
+++ b/sdk/ai/azure-ai-projects/samples/evaluation/sample_evaluations_async.py
@@ -98,7 +98,7 @@ async def main() -> None:
                 evaluation,
                 headers={
                     "model-endpoint": model_endpoint,
-                    "api-key": model_api_key,
+                    "model-api-key": model_api_key,
                 },
             )
             print(evaluation_response)
diff --git a/sdk/ai/azure-ai-projects/samples/red_team/sample_red_team.py b/sdk/ai/azure-ai-projects/samples/red_team/sample_red_team.py
index 1c2934e13a51..0031b1ce6570 100644
--- a/sdk/ai/azure-ai-projects/samples/red_team/sample_red_team.py
+++ b/sdk/ai/azure-ai-projects/samples/red_team/sample_red_team.py
@@ -66,7 +66,7 @@
         red_team=red_team,
         headers={
             "model-endpoint": model_endpoint,
-            "api-key": model_api_key,
+            "model-api-key": model_api_key,
         },
     )
     print(f"Red Team scan created with scan name: {red_team_response.name}")
diff --git a/sdk/ai/azure-ai-projects/samples/red_team/sample_red_team_async.py b/sdk/ai/azure-ai-projects/samples/red_team/sample_red_team_async.py
index d99e6b939796..764dbc1d1611 100644
--- a/sdk/ai/azure-ai-projects/samples/red_team/sample_red_team_async.py
+++ b/sdk/ai/azure-ai-projects/samples/red_team/sample_red_team_async.py
@@ -71,7 +71,7 @@ async def sample_red_team_async() -> None:
                 red_team=red_team,
                 headers={
                     "model-endpoint": model_endpoint,
-                    "api-key": model_api_key,
+                    "model-api-key": model_api_key,
                 },
             )
             print(f"Red Team scan created with scan name: {red_team_response.name}")