diff --git a/packages/api-client/src/modules/archon/servers/v0.ts b/packages/api-client/src/modules/archon/servers/v0.ts
index 8dee490de6..694ddd2147 100644
--- a/packages/api-client/src/modules/archon/servers/v0.ts
+++ b/packages/api-client/src/modules/archon/servers/v0.ts
@@ -97,19 +97,6 @@ export class ArchonServersV0Module extends AbstractModule {
 		})
 	}
 
-	/**
-	 * Send a power action to a server (Start, Stop, Restart, Kill)
-	 * POST /modrinth/v0/servers/:id/power
-	 */
-	public async power(serverId: string, action: Archon.Servers.v0.PowerAction): Promise<void> {
-		await this.client.request(`/servers/${serverId}/power`, {
-			api: 'archon',
-			method: 'POST',
-			version: 'modrinth/v0',
-			body: { action },
-		})
-	}
-
 	/**
 	 * Reinstall a server with a new loader or modpack
 	 * POST /modrinth/v0/servers/:id/reinstall
diff --git a/packages/api-client/src/modules/archon/servers/v1.ts b/packages/api-client/src/modules/archon/servers/v1.ts
index 2abf6fd58c..36100a7005 100644
--- a/packages/api-client/src/modules/archon/servers/v1.ts
+++ b/packages/api-client/src/modules/archon/servers/v1.ts
@@ -91,6 +91,23 @@ export class ArchonServersV1Module extends AbstractModule {
 		})
 	}
 
+	/**
+	 * Run a power action for a specific world
+	 * POST /v1/servers/:id/worlds/:wid/power
+	 */
+	public async powerWorld(
+		serverId: string,
+		worldId: string,
+		request: Archon.Servers.v1.WorldPowerActionRequest,
+	): Promise<void> {
+		await this.client.request(`/servers/${serverId}/worlds/${worldId}/power`, {
+			api: 'archon',
+			version: 1,
+			method: 'POST',
+			body: request,
+		})
+	}
+
 	/**
 	 * Reset a world to onboarding
 	 * POST /v1/servers/:id/worlds/:wid/onboard
diff --git a/packages/api-client/src/modules/archon/types.ts b/packages/api-client/src/modules/archon/types.ts
index 39bd4a8073..da6627a705 100644
--- a/packages/api-client/src/modules/archon/types.ts
+++ b/packages/api-client/src/modules/archon/types.ts
@@ -681,8 +681,6 @@ export namespace Archon {
 				token: string // JWT token for filesystem access
 			}
 
-			export type PowerAction = 'Start' | 'Stop' | 'Restart' | 'Kill'
-
 			export type ReinstallLoaderRequest = {
 				loader: string
 				loader_version?: string
@@ -715,6 +713,13 @@ export namespace Archon {
 		}
 
 		export namespace v1 {
+			export type WorldPowerAction = 'start' | 'stop' | 'restart' | 'kill'
+
+			export type WorldPowerActionRequest = {
+				action: WorldPowerAction
+				shutdown_strategy?: string | null
+			}
+
 			export type ServerFull = {
 				id: string
 				name: string
diff --git a/packages/ui/src/components/servers/SaveBanner.vue b/packages/ui/src/components/servers/SaveBanner.vue
index afc753fe51..fdb613c9a4 100644
--- a/packages/ui/src/components/servers/SaveBanner.vue
+++ b/packages/ui/src/components/servers/SaveBanner.vue
@@ -14,7 +14,7 @@
 					</button>
 				</ButtonStyled>
 				<ButtonStyled v-if="props.restart" color="brand">
-					<button :disabled="props.isUpdating || isTransitioning" @click="saveAndPower">
+					<button :disabled="props.isUpdating || isTransitioning || !worldId" @click="saveAndPower">
 						<SpinnerIcon v-if="props.isUpdating || isTransitioning" class="animate-spin" />
 						{{ powerButtonLabel }}
 					</button>
@@ -43,7 +43,7 @@ const props = defineProps<{
 
 const client = injectModrinthClient()
 
-const { powerState } = injectModrinthServerContext()
+const { powerState, worldId } = injectModrinthServerContext()
 
 const isStopped = computed(() => powerState.value === 'stopped' || powerState.value === 'crashed')
 
@@ -63,6 +63,9 @@ const saveAndPower = async () => {
 	} catch {
 		return
 	}
-	await client.archon.servers_v0.power(props.serverId, isStopped.value ? 'Start' : 'Restart')
+	if (!worldId.value) return
+	await client.archon.servers_v1.powerWorld(props.serverId, worldId.value, {
+		action: isStopped.value ? 'start' : 'restart',
+	})
 }
 </script>
diff --git a/packages/ui/src/components/servers/server-header/WorldManageHeader.vue b/packages/ui/src/components/servers/server-header/ServerInstanceManageHeader.vue
similarity index 99%
rename from packages/ui/src/components/servers/server-header/WorldManageHeader.vue
rename to packages/ui/src/components/servers/server-header/ServerInstanceManageHeader.vue
index 7d2e3342bf..aede4b8c76 100644
--- a/packages/ui/src/components/servers/server-header/WorldManageHeader.vue
+++ b/packages/ui/src/components/servers/server-header/ServerInstanceManageHeader.vue
@@ -76,7 +76,7 @@ const props = withDefaults(
 		loader: null,
 		loaderVersion: null,
 		lastActive: null,
-		fallbackName: 'World',
+		fallbackName: 'Instance',
 		headerClass: '',
 		actions: () => [],
 	},
diff --git a/packages/ui/src/components/servers/server-header/index.ts b/packages/ui/src/components/servers/server-header/index.ts
index dcbaebc210..8c63dc8038 100644
--- a/packages/ui/src/components/servers/server-header/index.ts
+++ b/packages/ui/src/components/servers/server-header/index.ts
@@ -1,3 +1,3 @@
 export { default as PanelServerActionButton } from './PanelServerActionButton.vue'
 export { default as ServerManageHeader } from './ServerManageHeader.vue'
-export { default as WorldManageHeader } from './WorldManageHeader.vue'
+export { default as ServerInstanceManageHeader } from './ServerInstanceManageHeader.vue'
diff --git a/packages/ui/src/components/servers/server-header/use-server-power-action.ts b/packages/ui/src/components/servers/server-header/use-server-power-action.ts
index 05fdfb5073..edd06d7d5f 100644
--- a/packages/ui/src/components/servers/server-header/use-server-power-action.ts
+++ b/packages/ui/src/components/servers/server-header/use-server-power-action.ts
@@ -9,12 +9,19 @@ import {
 	injectNotificationManager,
 } from '#ui/providers'
 
-export type PowerAction = Archon.Servers.v0.PowerAction
+export type PowerAction = 'Start' | 'Stop' | 'Restart' | 'Kill'
+
+const powerActionMap = {
+	Start: 'start',
+	Stop: 'stop',
+	Restart: 'restart',
+	Kill: 'kill',
+} as const satisfies Record<PowerAction, Archon.Servers.v1.WorldPowerAction>
 
 export function useServerPowerAction(options?: { disabled?: Ref<boolean> }) {
 	const { formatMessage } = useVIntl()
 	const client = injectModrinthClient()
-	const { serverId, server, powerState, isSyncingContent, busyReasons } =
+	const { serverId, worldId, server, powerState, isSyncingContent, busyReasons } =
 		injectModrinthServerContext()
 	const { addNotification } = injectNotificationManager()
 	const { canUsePowerActions, permissionDeniedMessage } = useServerPermissions()
@@ -46,16 +53,18 @@ export function useServerPowerAction(options?: { disabled?: Ref<boolean> }) {
 
 	const busyTooltip = computed(() => {
 		if (!canUsePowerActions.value) return permissionDeniedMessage.value
+		if (!worldId.value) return 'Your server instance is loading'
 		if (isStarting.value) return 'Your server is starting'
 		return busyReasons.value.length > 0 ? formatMessage(busyReasons.value[0].reason) : undefined
 	})
 
 	const canTakeAction = computed(
-		() => !isTransitioning.value && !isBlockedByPropsBusyOrPermission.value,
+		() => !!worldId.value && !isTransitioning.value && !isBlockedByPropsBusyOrPermission.value,
 	)
 
 	const canKill = computed(
 		() =>
+			!!worldId.value &&
 			!isBlockedByPropsBusyOrPermission.value &&
 			(isStopping.value || isRunning.value || isStarting.value),
 	)
@@ -72,9 +81,13 @@ export function useServerPowerAction(options?: { disabled?: Ref<boolean> }) {
 		}
 	})
 
-	async function sendPowerAction(action: PowerAction) {
+	async function sendPowerAction(action: PowerAction, targetWorldId = worldId.value) {
+		if (!targetWorldId) return
+
 		try {
-			await client.archon.servers_v0.power(serverId, action)
+			await client.archon.servers_v1.powerWorld(serverId, targetWorldId, {
+				action: powerActionMap[action],
+			})
 		} catch (error) {
 			console.error(`Error performing ${action} on server:`, error)
 			addNotification({
@@ -85,13 +98,13 @@ export function useServerPowerAction(options?: { disabled?: Ref<boolean> }) {
 		}
 	}
 
-	function initiateAction(action: PowerAction) {
+	function initiateAction(action: PowerAction, targetWorldId = worldId.value) {
 		if (action === 'Kill') {
 			if (!canKill.value) return
 		} else {
 			if (!canTakeAction.value) return
 		}
-		void sendPowerAction(action)
+		void sendPowerAction(action, targetWorldId)
 	}
 
 	function handlePrimaryAction() {
diff --git a/packages/ui/src/layouts/wrapped/hosting/manage/[id]/instances/[instance-id]/files.vue b/packages/ui/src/layouts/wrapped/hosting/manage/[id]/instances/[instance-id]/files.vue
index 6ba1e9cf92..3759614d67 100644
--- a/packages/ui/src/layouts/wrapped/hosting/manage/[id]/instances/[instance-id]/files.vue
+++ b/packages/ui/src/layouts/wrapped/hosting/manage/[id]/instances/[instance-id]/files.vue
@@ -389,8 +389,8 @@ onMounted(async () => {
 
 // Restart
 async function restartServer() {
-	if (!canUsePowerActions.value) return
-	await client.archon.servers_v0.power(serverId, 'Restart')
+	if (!canUsePowerActions.value || !worldId.value) return
+	await client.archon.servers_v1.powerWorld(serverId, worldId.value, { action: 'restart' })
 }
 
 function getSessionUploadFilename(fileName: string) {
diff --git a/packages/ui/src/layouts/wrapped/hosting/manage/[id]/instances/[instance-id]/index.vue b/packages/ui/src/layouts/wrapped/hosting/manage/[id]/instances/[instance-id]/index.vue
index a23e2757a4..58d734ff76 100644
--- a/packages/ui/src/layouts/wrapped/hosting/manage/[id]/instances/[instance-id]/index.vue
+++ b/packages/ui/src/layouts/wrapped/hosting/manage/[id]/instances/[instance-id]/index.vue
@@ -1,6 +1,6 @@
 <template>
 	<div class="flex min-h-[36rem] flex-col gap-4 text-primary">
-		<WorldManageHeader
+		<ServerInstanceManageHeader
 			:name="worldName"
 			:game-version="gameVersion"
 			:loader="loader"
@@ -38,7 +38,7 @@ import { useRouter } from 'vue-router'
 
 import type { JoinedButtonAction } from '#ui/components/base/JoinedButtons.vue'
 import NavTabs from '#ui/components/base/NavTabs.vue'
-import { WorldManageHeader } from '#ui/components/servers/server-header'
+import { ServerInstanceManageHeader } from '#ui/components/servers/server-header'
 import { useServerPowerAction } from '#ui/components/servers/server-header/use-server-power-action'
 import { useRelativeTime } from '#ui/composables'
 import { defineMessages, useVIntl } from '#ui/composables/i18n'
@@ -179,12 +179,11 @@ const restartSplitActions = computed<JoinedButtonAction[]>(() => [
 		icon: UpdatedIcon,
 		action: () => initiateAction('Restart'),
 	},
-	// TODO: Implement world scoping when Archon/Kyros support target worlds in power requests.
 	...restartableWorlds.value.map((world) => ({
 		id: `restart-${world.id}`,
 		label: `Restart with ${world.name}`,
 		icon: GlobeIcon,
-		action: () => initiateAction('Restart'),
+		action: () => initiateAction('Restart', world.id),
 	})),
 ])
 const powerActions = computed(() => {
diff --git a/packages/ui/src/stories/servers/WorldManageHeader.stories.ts b/packages/ui/src/stories/servers/ServerInstanceManageHeader.stories.ts
similarity index 79%
rename from packages/ui/src/stories/servers/WorldManageHeader.stories.ts
rename to packages/ui/src/stories/servers/ServerInstanceManageHeader.stories.ts
index ad0c75b8a7..a0a79308c6 100644
--- a/packages/ui/src/stories/servers/WorldManageHeader.stories.ts
+++ b/packages/ui/src/stories/servers/ServerInstanceManageHeader.stories.ts
@@ -1,11 +1,11 @@
 import { PlayIcon, SettingsIcon } from '@modrinth/assets'
 import type { Meta, StoryObj } from '@storybook/vue3-vite'
 
-import WorldManageHeader from '../../components/servers/server-header/WorldManageHeader.vue'
+import ServerInstanceManageHeader from '../../components/servers/server-header/ServerInstanceManageHeader.vue'
 
 const meta = {
-	title: 'Servers/WorldManageHeader',
-	component: WorldManageHeader,
+	title: 'Servers/ServerInstanceManageHeader',
+	component: ServerInstanceManageHeader,
 	parameters: {
 		layout: 'padded',
 	},
@@ -15,7 +15,7 @@ const meta = {
 			template: '<div style="max-width: 920px;"><story /></div>',
 		}),
 	],
-} satisfies Meta<typeof WorldManageHeader>
+} satisfies Meta<typeof ServerInstanceManageHeader>
 
 export default meta
 type Story = StoryObj<typeof meta>