diff --git a/tests/e2e/a2a/a2a_client.py b/tests/e2e/a2a/a2a_client.py
index 97ffa8c34a3..3835ef64220 100644
--- a/tests/e2e/a2a/a2a_client.py
+++ b/tests/e2e/a2a/a2a_client.py
@@ -85,6 +85,7 @@ class A2ABridgeParams(BaseModel):
 
     custom_llm_provider: str
     model: str
+    api_key: str | None = None
 
 
 class AgentRegisterBody(BaseModel):
diff --git a/tests/e2e/a2a/test_a2a_agent_e2e.py b/tests/e2e/a2a/test_a2a_agent_e2e.py
index aa60b57f99b..4b05dbeb3ed 100644
--- a/tests/e2e/a2a/test_a2a_agent_e2e.py
+++ b/tests/e2e/a2a/test_a2a_agent_e2e.py
@@ -32,7 +32,11 @@ from e2e_config import unique_marker
 from e2e_http import Result, UnknownApiError, unwrap
 from lifecycle import ResourceManager
 
-BRIDGE = A2ABridgeParams(custom_llm_provider="anthropic", model="claude-haiku-4-5")
+BRIDGE = A2ABridgeParams(
+    custom_llm_provider="anthropic",
+    model="claude-haiku-4-5",
+    api_key="os.environ/ANTHROPIC_API_KEY",
+)
 
 MOVEHOME_AGENT_CARD_URL = "https://movehome.org/.well-known/agent.json"
 MOVEHOME_ORIGIN = "https://movehome.org"