diff --git a/src/sentry/seer/endpoints/seer_rpc.py b/src/sentry/seer/endpoints/seer_rpc.py
index e476c9abf5da5a..7d47716b96e6ef 100644
--- a/src/sentry/seer/endpoints/seer_rpc.py
+++ b/src/sentry/seer/endpoints/seer_rpc.py
@@ -1048,6 +1048,14 @@ def record_pr_attribution(
     return PrAttributionResponse(attribution_id=attribution.id)
 
 
+class ValidateLlmProxyKeyResponse(BaseModel):
+    valid: bool
+
+
+def validate_llm_proxy_key(api_key: str) -> ValidateLlmProxyKeyResponse:
+    return ValidateLlmProxyKeyResponse(valid=True)
+
+
 # Every value below MUST be a function returning a `pydantic.BaseModel` (or
 # a union of `BaseModel` subclasses, optionally with `None`). Two complementary
 # guards enforce this:
@@ -1137,6 +1145,9 @@ def record_pr_attribution(
     #
     # Monitoring provider tokens (MCP)
     "refresh_monitoring_provider_token": seer_rpc(refresh_monitoring_provider_token),
+    #
+    # LLM Proxy
+    "validate_llm_proxy_key": seer_rpc(validate_llm_proxy_key),
 }
 
 
diff --git a/tests/sentry/seer/endpoints/test_seer_rpc.py b/tests/sentry/seer/endpoints/test_seer_rpc.py
index 067a70138790ec..5a0faed8c69ad3 100644
--- a/tests/sentry/seer/endpoints/test_seer_rpc.py
+++ b/tests/sentry/seer/endpoints/test_seer_rpc.py
@@ -91,6 +91,15 @@ def test_get_organization_features_registered_on_internal_rpc(self) -> None:
         assert "features" in response.data
         assert isinstance(response.data["features"], list)
 
+    def test_validate_llm_proxy_key(self) -> None:
+        path = self._get_path("validate_llm_proxy_key")
+        data: dict[str, Any] = {"args": {"api_key": "test-key"}}
+        response = self.client.post(
+            path, data=data, HTTP_AUTHORIZATION=self.auth_header(path, data)
+        )
+        assert response.status_code == 200
+        assert response.data["valid"] is True
+
     def test_snuba_rate_limit_returns_429(self) -> None:
         """Test that SnubaRPCRateLimitExceeded returns 429 to Seer for retry."""
         path = self._get_path("get_trace_waterfall")