diff --git a/hermes_cli/doctor.py b/hermes_cli/doctor.py
index 34a57aad2..892ff0021 100644
--- a/hermes_cli/doctor.py
+++ b/hermes_cli/doctor.py
@@ -42,6 +42,7 @@ _PROVIDER_ENV_HINTS = (
     "ZAI_API_KEY",
     "Z_AI_API_KEY",
     "KIMI_API_KEY",
+    "KIMI_CN_API_KEY",
     "MINIMAX_API_KEY",
     "MINIMAX_CN_API_KEY",
     "KILOCODE_API_KEY",
@@ -749,7 +750,7 @@ def run_doctor(args):
             print(f"  Checking {_pname} API...", end="", flush=True)
             try:
                 import httpx
-                _base = os.getenv(_base_env, "")
+                _base = os.getenv(_base_env, "") if _base_env else ""
                 # Auto-detect Kimi Code keys (sk-kimi-) → api.kimi.com
                 if not _base and _key.startswith("sk-kimi-"):
                     _base = "https://api.kimi.com/coding/v1"
diff --git a/tests/hermes_cli/test_doctor.py b/tests/hermes_cli/test_doctor.py
index faaa7a8a2..dd15336f6 100644
--- a/tests/hermes_cli/test_doctor.py
+++ b/tests/hermes_cli/test_doctor.py
@@ -40,6 +40,10 @@ class TestProviderEnvDetection:
         content = "OPENAI_BASE_URL=http://localhost:8080/v1\n"
         assert _has_provider_env_config(content)
 
+    def test_detects_kimi_cn_api_key(self):
+        content = "KIMI_CN_API_KEY=sk-test\n"
+        assert _has_provider_env_config(content)
+
     def test_returns_false_when_no_provider_settings(self):
         content = "TERMINAL_ENV=local\n"
         assert not _has_provider_env_config(content)
@@ -292,3 +296,50 @@ def test_run_doctor_termux_does_not_mark_browser_available_without_agent_browser
     assert "system dependency not met" in out
     assert "agent-browser is not installed (expected in the tested Termux path)" in out
     assert "npm install -g agent-browser && agent-browser install" in out
+
+
+def test_run_doctor_kimi_cn_env_is_detected_and_probe_is_null_safe(monkeypatch, tmp_path):
+    home = tmp_path / ".hermes"
+    home.mkdir(parents=True, exist_ok=True)
+    (home / "config.yaml").write_text("memory: {}\n", encoding="utf-8")
+    (home / ".env").write_text("KIMI_CN_API_KEY=sk-test\n", encoding="utf-8")
+    project = tmp_path / "project"
+    project.mkdir(exist_ok=True)
+
+    monkeypatch.setattr(doctor_mod, "HERMES_HOME", home)
+    monkeypatch.setattr(doctor_mod, "PROJECT_ROOT", project)
+    monkeypatch.setattr(doctor_mod, "_DHH", str(home))
+    monkeypatch.setenv("KIMI_CN_API_KEY", "sk-test")
+
+    fake_model_tools = types.SimpleNamespace(
+        check_tool_availability=lambda *a, **kw: ([], []),
+        TOOLSET_REQUIREMENTS={},
+    )
+    monkeypatch.setitem(sys.modules, "model_tools", fake_model_tools)
+
+    try:
+        from hermes_cli import auth as _auth_mod
+        monkeypatch.setattr(_auth_mod, "get_nous_auth_status", lambda: {})
+        monkeypatch.setattr(_auth_mod, "get_codex_auth_status", lambda: {})
+    except Exception:
+        pass
+
+    calls = []
+
+    def fake_get(url, headers=None, timeout=None):
+        calls.append((url, headers, timeout))
+        return types.SimpleNamespace(status_code=200)
+
+    import httpx
+    monkeypatch.setattr(httpx, "get", fake_get)
+
+    import io, contextlib
+    buf = io.StringIO()
+    with contextlib.redirect_stdout(buf):
+        doctor_mod.run_doctor(Namespace(fix=False))
+    out = buf.getvalue()
+
+    assert "API key or custom endpoint configured" in out
+    assert "Kimi / Moonshot (China)" in out
+    assert "str expected, not NoneType" not in out
+    assert any(url == "https://api.moonshot.cn/v1/models" for url, _, _ in calls)