diff --git a/src/app/ItemPageLayout.js b/src/app/ItemPageLayout.js
index a82b0d4..9caad8c 100644
--- a/src/app/ItemPageLayout.js
+++ b/src/app/ItemPageLayout.js
@@ -10,10 +10,13 @@ import {
   Portal,
   Select,
   Skeleton,
+  Spinner,
   Tooltip,
+  useToast,
   VStack,
 } from "@chakra-ui/react";
 import { ExternalLinkIcon, ChevronRightIcon } from "@chakra-ui/icons";
+import { gql, useMutation } from "@apollo/client";
 
 import {
   ItemBadgeList,
@@ -204,13 +207,32 @@ function ItemPageBadges({ item, isEmbedded }) {
 }
 
 function ItemKindBadgeWithSupportTools({ item }) {
-  const { isSupportUser } = useSupport();
+  const { isSupportUser, supportSecret } = useSupport();
+  const toast = useToast();
 
   const ncRef = React.useRef(null);
 
   const isNcAutoDetectedFromRarity =
     item.rarityIndex === 500 || item.rarityIndex === 0;
 
+  const [mutate, { loading }] = useMutation(gql`
+    mutation ItemPageSupportSetIsManuallyNc(
+      $itemId: ID!
+      $isManuallyNc: Boolean!
+      $supportSecret: String!
+    ) {
+      setItemIsManuallyNc(
+        itemId: $itemId
+        isManuallyNc: $isManuallyNc
+        supportSecret: $supportSecret
+      ) {
+        id
+        isNc
+        isManuallyNc
+      }
+    }
+  `);
+
   if (isSupportUser && item.rarityIndex != null && item.isManuallyNc != null) {
     // TODO: Could code-split this into a SupportOnly file...
     return (
@@ -230,6 +252,31 @@ function ItemKindBadgeWithSupportTools({ item }) {
                   ref={ncRef}
                   size="xs"
                   value={item.isManuallyNc ? "true" : "false"}
+                  onChange={(e) => {
+                    const isManuallyNc = e.target.value === "true";
+                    mutate({
+                      variables: {
+                        itemId: item.id,
+                        isManuallyNc,
+                        supportSecret,
+                      },
+                      optimisticResponse: {
+                        setItemIsManuallyNc: {
+                          __typename: "Item",
+                          id: item.id,
+                          isNc: isManuallyNc || isNcAutoDetectedFromRarity,
+                          isManuallyNc,
+                        },
+                      },
+                    }).catch((e) => {
+                      console.error(e);
+                      toast({
+                        status: "error",
+                        title:
+                          "Could not set NC status for this item. Try again?",
+                      });
+                    });
+                  }}
                 >
                   <option value="false">
                     Auto-detect: {isNcAutoDetectedFromRarity ? "Yes" : "No"}.{" "}
@@ -237,6 +284,7 @@ function ItemKindBadgeWithSupportTools({ item }) {
                   </option>
                   <option value="true">Manually set: Yes.</option>
                 </Select>
+                {loading && <Spinner size="sm" marginLeft="2" />}
               </Flex>
               <Flex align="center">
                 <Box as="span" fontWeight="600" marginRight="1">
diff --git a/src/server/types/MutationsForSupport.js b/src/server/types/MutationsForSupport.js
index 6e3cbfe..03be98d 100644
--- a/src/server/types/MutationsForSupport.js
+++ b/src/server/types/MutationsForSupport.js
@@ -37,6 +37,12 @@ const typeDefs = gql`
       supportSecret: String!
     ): Item!
 
+    setItemIsManuallyNc(
+      itemId: ID!
+      isManuallyNc: Boolean!
+      supportSecret: String!
+    ): Item!
+
     setLayerBodyId(
       layerId: ID!
       bodyId: ID!
@@ -206,6 +212,69 @@ const resolvers = {
       return { id: itemId };
     },
 
+    setItemIsManuallyNc: async (
+      _,
+      { itemId, isManuallyNc, supportSecret },
+      { itemLoader, itemTranslationLoader, db }
+    ) => {
+      assertSupportSecretOrThrow(supportSecret);
+
+      const oldItem = await itemLoader.load(itemId);
+
+      const [
+        result,
+      ] = await db.execute(
+        `UPDATE items SET is_manually_nc = ? WHERE id = ? LIMIT 1`,
+        [isManuallyNc ? 1 : 0, itemId]
+      );
+
+      if (result.affectedRows !== 1) {
+        throw new Error(
+          `Expected to affect 1 item, but affected ${result.affectedRows}`
+        );
+      }
+
+      itemLoader.clear(itemId); // we changed the item, so clear it from cache
+
+      if (process.env["SUPPORT_TOOLS_DISCORD_WEBHOOK_URL"]) {
+        try {
+          const itemTranslation = await itemTranslationLoader.load(itemId);
+          const oldRuleName = oldItem.isManuallyNc
+            ? "Manually set: Yes"
+            : "Auto-detect";
+          const newRuleName = isManuallyNc
+            ? "Manually set: Yes"
+            : "Auto-detect";
+          await logToDiscord({
+            embeds: [
+              {
+                title: `🛠 ${itemTranslation.name}`,
+                thumbnail: {
+                  url: oldItem.thumbnailUrl,
+                  height: 80,
+                  width: 80,
+                },
+                fields: [
+                  {
+                    name: "Is NC rule",
+                    value: `${oldRuleName} → **${newRuleName}**`,
+                  },
+                ],
+                timestamp: new Date().toISOString(),
+                url: `https://impress.openneo.net/items/${oldItem.id}`,
+              },
+            ],
+          });
+        } catch (e) {
+          console.error("Error sending Discord support log", e);
+        }
+      } else {
+        console.warn("No Discord support webhook provided, skipping");
+      }
+
+      return { id: itemId };
+    },
+
     setLayerBodyId: async (
       _,
       { layerId, bodyId, supportSecret },