diff --git a/dashboard/src/api/modules/connectors.ts b/dashboard/src/api/modules/connectors.ts
index df2e39708..9a0ccbf0c 100644
--- a/dashboard/src/api/modules/connectors.ts
+++ b/dashboard/src/api/modules/connectors.ts
@@ -18,7 +18,7 @@ export interface ConnectorCatalogEntry {
   icon: string;
   color: string;
   phase: "available" | "coming_soon";
-  mcp_mode: "remote" | "gateway" | "internal";
+  mcp_mode: "remote" | "gateway" | "internal" | "stdio";
   category: ConnectorCategory;
   quick_auth_url?: string | null;
   login_url?: string | null;
diff --git a/src/octop/infra/connectors/builder.py b/src/octop/infra/connectors/builder.py
index c93cd8fdc..828f912fa 100644
--- a/src/octop/infra/connectors/builder.py
+++ b/src/octop/infra/connectors/builder.py
@@ -118,6 +118,10 @@ def _build_stdio_spec(entry: ConnectorCatalogEntry, creds: dict[str, Any]) -> di
             creds.get("token") or creds.get("api_key") or creds.get("personal_token") or ""
         ).strip()
         base_url = str(creds.get("base_url") or "https://www.yuque.com/api/v2").strip()
+        # The Yuque Open API lives under /api/v2; a bare site root would send
+        # requests to the marketing homepage, so append the path when missing.
+        if not base_url.endswith("/api/v2"):
+            base_url = base_url.rstrip("/") + "/api/v2"
         return {
             "transport": "stdio",
             "command": "npx",
@@ -529,6 +533,16 @@ def _redact_mcp_configs_for_log(configs: dict[str, Any]) -> dict[str, Any]:
                 if key in redacted:
                     redacted[key] = "***"
             entry["headers"] = redacted
+        env = entry.get("env")
+        if isinstance(env, dict):
+            redacted_env = dict(env)
+            for env_key in redacted_env:
+                if any(
+                    marker in env_key.upper()
+                    for marker in ("TOKEN", "SECRET", "KEY", "PASSWORD", "CREDENTIAL")
+                ):
+                    redacted_env[env_key] = "***"
+            entry["env"] = redacted_env
         for key, value in list(entry.items()):
             if callable(value):
                 entry[key] = f"<callable {getattr(value, '__name__', type(value).__name__)}>"
diff --git a/tests/unit/test_connectors.py b/tests/unit/test_connectors.py
index 953ffe663..d30e4b891 100644
--- a/tests/unit/test_connectors.py
+++ b/tests/unit/test_connectors.py
@@ -287,6 +287,53 @@ def test_dify_builds_streamable_http_spec():
     }
 
 
+def test_yuque_mcp_builds_stdio_spec():
+    entry = get_catalog_entry("yuque-mcp")
+    assert entry is not None
+    assert entry.mcp_mode == "stdio"
+    creds = validate_create_credentials("yuque-mcp", {"token": "yuque-token"})
+    assert creds == {"token": "yuque-token"}
+    spec = build_http_mcp_spec(
+        entry=entry,
+        instance_id="x",
+        creds=creds,
+        config=OctopConfig(),
+    )
+    assert spec == {
+        "transport": "stdio",
+        "command": "npx",
+        "args": ["-y", "yuque-mcp"],
+        "env": {
+            "YUQUE_PERSONAL_TOKEN": "yuque-token",
+            "YUQUE_BASE_URL": "https://www.yuque.com/api/v2",
+        },
+    }
+
+
+def test_yuque_mcp_stdio_spec_appends_api_v2_to_site_root():
+    entry = get_catalog_entry("yuque-mcp")
+    assert entry is not None
+    spec = build_http_mcp_spec(
+        entry=entry,
+        instance_id="x",
+        creds={"token": "t", "base_url": "https://www.yuque.com"},
+        config=OctopConfig(),
+    )
+    assert spec["env"]["YUQUE_BASE_URL"] == "https://www.yuque.com/api/v2"
+
+
+def test_yuque_mcp_stdio_spec_keeps_explicit_api_v2():
+    entry = get_catalog_entry("yuque-mcp")
+    assert entry is not None
+    spec = build_http_mcp_spec(
+        entry=entry,
+        instance_id="x",
+        creds={"token": "t", "base_url": "https://www.yuque.com/api/v2"},
+        config=OctopConfig(),
+    )
+    assert spec["env"]["YUQUE_BASE_URL"] == "https://www.yuque.com/api/v2"
+
+
 def test_dify_rejects_non_server_url():
     with pytest.raises(ValueError, match="Dify MCP Server URL"):
         validate_create_credentials("dify", {"mcp_url": "https://dify.example.com/v1/chat"})
@@ -306,6 +353,27 @@ def test_dify_server_code_is_redacted_from_logs():
     assert redacted["dify__x"]["url"] == "https://dify.example.com/mcp/server/***/mcp"
 
 
+def test_stdio_spec_env_tokens_are_redacted_from_logs():
+    from octop.infra.connectors.builder import _redact_mcp_configs_for_log
+
+    redacted = _redact_mcp_configs_for_log(
+        {
+            "yuque-mcp__x": {
+                "transport": "stdio",
+                "command": "npx",
+                "args": ["-y", "yuque-mcp"],
+                "env": {
+                    "YUQUE_PERSONAL_TOKEN": "top-secret-token",
+                    "YUQUE_BASE_URL": "https://www.yuque.com/api/v2",
+                },
+            }
+        }
+    )
+    env = redacted["yuque-mcp__x"]["env"]
+    assert env["YUQUE_PERSONAL_TOKEN"] == "***"
+    assert env["YUQUE_BASE_URL"] == "https://www.yuque.com/api/v2"
+
+
 def test_didi_builds_streamable_http_spec_from_user_key():
     entry = get_catalog_entry("didi")
     assert entry is not None