diff --git a/.changeset/fix-chats-archive-endpoint.md b/.changeset/fix-chats-archive-endpoint.md
new file mode 100644
index 00000000..a0239834
--- /dev/null
+++ b/.changeset/fix-chats-archive-endpoint.md
@@ -0,0 +1,12 @@
+---
+'@beeper/cli': patch
+---
+
+Fix `chats archive` and `chats unarchive` silently no-op'ing.
+
+Both commands called the generic chat-update endpoint (`PATCH /v1/chats/{chatID}`
+with `{ isArchived }`), which returns `200 OK` but ignores `isArchived` — so the
+command reported success while the chat was never archived or unarchived. They now
+call the dedicated archive endpoint (`archiveChat`: `POST /v1/chats/{chatID}/archive`
+with `{ archived }`) via `client.chats.archive(chatID, { archived })`, so the chat's
+archive state actually changes.
diff --git a/packages/cli/src/commands/chats/archive.ts b/packages/cli/src/commands/chats/archive.ts
index 17b27e61..408eb4d3 100644
--- a/packages/cli/src/commands/chats/archive.ts
+++ b/packages/cli/src/commands/chats/archive.ts
@@ -14,6 +14,7 @@ export default class ChatsArchive extends BeeperCommand {
     
     const client = await createClient(flags)
     const chatID = await resolveChatID(client, flags.chat, { pick: flags.pick })
-    await printData(await client.chats.update(chatID, { isArchived: true }), flags.json ? 'json' : 'human')
+    await client.chats.archive(chatID, { archived: true })
+    await printSuccess({ message: 'Chat archived', data: { chatID, archived: true } }, flags.json ? 'json' : 'human')
   }
 }
diff --git a/packages/cli/src/commands/chats/unarchive.ts b/packages/cli/src/commands/chats/unarchive.ts
index 0da9088a..28a5527e 100644
--- a/packages/cli/src/commands/chats/unarchive.ts
+++ b/packages/cli/src/commands/chats/unarchive.ts
@@ -14,6 +14,7 @@ export default class ChatsUnarchive extends BeeperCommand {
     
     const client = await createClient(flags)
     const chatID = await resolveChatID(client, flags.chat, { pick: flags.pick })
-    await printData(await client.chats.update(chatID, { isArchived: false }), flags.json ? 'json' : 'human')
+    await client.chats.archive(chatID, { archived: false })
+    await printSuccess({ message: 'Chat unarchived', data: { chatID, archived: false } }, flags.json ? 'json' : 'human')
   }
 }