diff --git a/onebot/plugins/urlinfo.py b/onebot/plugins/urlinfo.py
index 09f8e93..d3af176 100644
--- a/onebot/plugins/urlinfo.py
+++ b/onebot/plugins/urlinfo.py
@@ -364,6 +364,11 @@ def _process_url_mediawiki(
     ) -> Optional[list[str]]:
         parsed = urlparse(url)
         hostname = parsed.hostname
+
+        # Auto-detect Wikipedia URLs (any language edition)
+        if hostname and hostname.endswith(".wikipedia.org"):
+            return self._process_wikipedia(session, parsed)
+
         if hostname not in self.mediawiki_sites:
             return None
 
@@ -401,6 +406,21 @@ def _process_url_mediawiki(
 
         return None
 
+    def _process_wikipedia(
+        self, session: requests.Session, parsed: ParseResult
+    ) -> Optional[list[str]]:
+        """Handle public Wikipedia URLs without requiring config."""
+        title = self._mediawiki_get_title(parsed)
+        if not title:
+            return None
+
+        api_url = f"https://{parsed.hostname}/w/api.php"
+        try:
+            return self._mediawiki_request_info(session, api_url, title)
+        except Exception as e:
+            self.log.error("Wikipedia error: %s", e)
+            return None
+
     def _mediawiki_get_title(self, parsed_url: ParseResult) -> Optional[str]:
         """Extract MediaWiki page title from URL."""
         title = None
diff --git a/tests/test_plugin_urlinfo_mediawiki.py b/tests/test_plugin_urlinfo_mediawiki.py
index 35ffad2..ada2185 100644
--- a/tests/test_plugin_urlinfo_mediawiki.py
+++ b/tests/test_plugin_urlinfo_mediawiki.py
@@ -21,9 +21,6 @@ def setUp(self):
                         "username": "BotUser",
                         "password": "BotPassword",
                     },
-                    "en.wikipedia.org": {
-                        "api_url": "https://en.wikipedia.org/w/api.php",
-                    },
                 }
             }
         }
@@ -54,6 +51,45 @@ def test_wikipedia(self):
                         result = self.plugin._process_url(session, url)
                         self.assertEqual(result, expected)
 
+    @patch("socket.getaddrinfo")
+    def test_wikipedia_auto_detect_without_config(self, mock_getaddrinfo):
+        """Wikipedia URLs work without explicit mediawiki_sites config."""
+        mock_getaddrinfo.return_value = [
+            (socket.AF_INET, socket.SOCK_STREAM, 6, "", ("198.35.26.96", 443))
+        ]
+        session = MagicMock()
+        url = "https://nl.wikipedia.org/wiki/Internet_Relay_Chat"
+
+        def side_effect(url, **kwargs):
+            params = kwargs.get("params", {})
+            if params.get("prop") == "extracts|info":
+                return MagicMock(
+                    ok=True,
+                    json=lambda: {
+                        "query": {
+                            "pages": {
+                                "42": {
+                                    "pageid": 42,
+                                    "title": "Internet Relay Chat",
+                                    "extract": "IRC is een chatprotocol.",
+                                }
+                            }
+                        }
+                    },
+                )
+            return MagicMock(ok=True, json=lambda: {})
+
+        session.get.side_effect = side_effect
+
+        result = self.plugin._process_url(session, url)
+        self.assertEqual(
+            result,
+            ["\u201cInternet Relay Chat\u201d", "\u2014 IRC is een chatprotocol."],
+        )
+        # Verify the API was called with the correct nl.wikipedia.org URL
+        call_args = session.get.call_args_list[-1]
+        self.assertIn("nl.wikipedia.org", call_args[0][0])
+
     @patch("socket.getaddrinfo")
     def test_mediawiki_login_and_fetch(self, mock_getaddrinfo):
         # Allow wiki.example.com (public IP)