diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 77fdebecc..95c99b09b 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -32,6 +32,7 @@
 use OCA\GroupFolders\Listeners\NodeRenamedListener;
 use OCA\GroupFolders\Mount\FolderStorageManager;
 use OCA\GroupFolders\Mount\MountProvider;
+use OCA\GroupFolders\Team\GroupFoldersTeamResourceProvider;
 use OCA\GroupFolders\Trash\TrashBackend;
 use OCA\GroupFolders\Trash\TrashManager;
 use OCA\GroupFolders\Versions\GroupVersionsExpireManager;
@@ -92,6 +93,8 @@ public function register(IRegistrationContext $context): void {
 		$context->registerEventListener(GroupDeletedEvent::class, DeleteListener::class);
 		$context->registerEventListener(UserDeletedEvent::class, DeleteListener::class);
 
+		$context->registerTeamResourceProvider(GroupFoldersTeamResourceProvider::class);
+
 		$context->registerService(MountProvider::class, function (ContainerInterface $c): MountProvider {
 			/** @var IAppConfig $config */
 			$config = $c->get(IAppConfig::class);
diff --git a/lib/Team/GroupFoldersTeamResourceProvider.php b/lib/Team/GroupFoldersTeamResourceProvider.php
new file mode 100644
index 000000000..d3a7ae8b8
--- /dev/null
+++ b/lib/Team/GroupFoldersTeamResourceProvider.php
@@ -0,0 +1,104 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\GroupFolders\Team;
+
+use OCA\GroupFolders\AppInfo\Application;
+use OCA\GroupFolders\Folder\FolderManager;
+use OCP\IL10N;
+use OCP\IURLGenerator;
+use OCP\Teams\ITeamResourceProvider;
+use OCP\Teams\TeamResource;
+
+class GroupFoldersTeamResourceProvider implements ITeamResourceProvider {
+	/** Provider icon: the Team folders app glyph (folder with members), no fill so it inherits currentColor. */
+	private const PROVIDER_ICON_SVG = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 18H4V8h16m0-2h-8l-2-2H4c-1.11 0-2 .89-2 2v12a2 2 0 0 0 2 2h16a2 2 0 0 0 2-2V8c0-1.11-.9-2-2-2Z"/><path d="M12 9.4a1.75 1.75 0 0 1 1.75 1.75A1.75 1.75 0 0 1 12 12.9a1.75 1.75 0 0 1-1.75-1.75A1.75 1.75 0 0 1 12 9.4m-3.5 1.25c.28 0 .54.075.765.21-.075.715.135 1.425.565 1.98-.25.48-.75.81-1.33.81a1.5 1.5 0 0 1-1.5-1.5 1.5 1.5 0 0 1 1.5-1.5m7 0a1.5 1.5 0 0 1 1.5 1.5 1.5 1.5 0 0 1-1.5 1.5c-.58 0-1.08-.33-1.33-.81.43-.555.64-1.265.565-1.98.225-.135.485-.21.765-.21m-6.75 5.125c0-1.035 1.455-1.875 3.25-1.875s3.25.84 3.25 1.875v.875h-6.5v-.875M6 16.65v-.75c0-.695.945-1.28 2.225-1.45-.295.34-.475.81-.475 1.325v.875H6m12 0h-1.75v-.875c0-.515-.18-.985-.475-1.325 1.28.17 2.225.755 2.225 1.45Z"/></svg>';
+
+	/** Per-resource icon: a plain folder, matching the files team resource provider. */
+	private const FOLDER_ICON_SVG = '<svg xmlns="http://www.w3.org/2000/svg" id="mdi-folder" viewBox="0 0 24 24"><path d="M10,4H4C2.89,4 2,4.89 2,6V18A2,2 0 0,0 4,20H20A2,2 0 0,0 22,18V8C22,6.89 21.1,6 20,6H12L10,4Z" /></svg>';
+
+	public function __construct(
+		private readonly IL10N $l,
+		private readonly IURLGenerator $url,
+		private readonly FolderManager $folderManager,
+	) {
+	}
+
+	public function getId(): string {
+		return Application::APP_ID;
+	}
+
+	public function getName(): string {
+		return $this->l->t('Team folders');
+	}
+
+	public function getIconSvg(): string {
+		return self::PROVIDER_ICON_SVG;
+	}
+
+	public function getSharedWith(string $teamId): array {
+		// Membership is gated by TeamManager before this runs, so we return every
+		// team folder mapped to this circle without re-checking the current user.
+		if ($this->folderManager->getCirclesManager() === null) {
+			return [];
+		}
+
+		$resources = [];
+		foreach ($this->folderManager->getAllFolders() as $folder) {
+			$applicable = $folder->groups[$teamId] ?? null;
+			if ($applicable === null || $applicable['type'] !== 'circle') {
+				continue;
+			}
+
+			$resources[] = new TeamResource(
+				$this,
+				(string)$folder->id,
+				$folder->mountPoint,
+				$this->url->linkToRouteAbsolute('files.view.index', ['dir' => '/' . $folder->mountPoint]),
+				iconSvg: self::FOLDER_ICON_SVG,
+			);
+		}
+
+		return $resources;
+	}
+
+	public function isSharedWithTeam(string $teamId, string $resourceId): bool {
+		if ($this->folderManager->getCirclesManager() === null) {
+			return false;
+		}
+
+		$folder = $this->folderManager->getAllFolders()[(int)$resourceId] ?? null;
+		if ($folder === null) {
+			return false;
+		}
+
+		$applicable = $folder->groups[$teamId] ?? null;
+		return $applicable !== null && $applicable['type'] === 'circle';
+	}
+
+	public function getTeamsForResource(string $resourceId): array {
+		if ($this->folderManager->getCirclesManager() === null) {
+			return [];
+		}
+
+		$folder = $this->folderManager->getAllFolders()[(int)$resourceId] ?? null;
+		if ($folder === null) {
+			return [];
+		}
+
+		$teamIds = [];
+		foreach ($folder->groups as $entityId => $applicable) {
+			if ($applicable['type'] === 'circle') {
+				$teamIds[] = (string)$entityId;
+			}
+		}
+
+		return $teamIds;
+	}
+}
diff --git a/tests/Team/GroupFoldersTeamResourceProviderTest.php b/tests/Team/GroupFoldersTeamResourceProviderTest.php
new file mode 100644
index 000000000..76b7fae3b
--- /dev/null
+++ b/tests/Team/GroupFoldersTeamResourceProviderTest.php
@@ -0,0 +1,142 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\GroupFolders\Tests\Team;
+
+use OCA\Circles\CirclesManager;
+use OCA\GroupFolders\Folder\FolderDefinitionWithMappings;
+use OCA\GroupFolders\Folder\FolderManager;
+use OCA\GroupFolders\Team\GroupFoldersTeamResourceProvider;
+use OCP\IL10N;
+use OCP\IURLGenerator;
+use OCP\Teams\TeamResource;
+use PHPUnit\Framework\MockObject\MockObject;
+use Test\TestCase;
+
+class GroupFoldersTeamResourceProviderTest extends TestCase {
+	private FolderManager&MockObject $folderManager;
+	private IL10N&MockObject $l10n;
+	private IURLGenerator&MockObject $urlGenerator;
+	private GroupFoldersTeamResourceProvider $provider;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->folderManager = $this->createMock(FolderManager::class);
+		$this->l10n = $this->createMock(IL10N::class);
+		$this->urlGenerator = $this->createMock(IURLGenerator::class);
+
+		$this->l10n->method('t')->willReturnArgument(0);
+		$this->urlGenerator->method('linkToRouteAbsolute')
+			->willReturnCallback(function (string $route, array $args = []): string {
+				$dir = $args['dir'] ?? '';
+				return 'https://cloud.example/' . $route . '?dir=' . (is_string($dir) ? $dir : '');
+			});
+
+		$this->provider = new GroupFoldersTeamResourceProvider(
+			$this->l10n,
+			$this->urlGenerator,
+			$this->folderManager,
+		);
+	}
+
+	/**
+	 * @param array<string, array{displayName: string, permissions: int, type: 'group'|'circle'}> $groups
+	 */
+	private function folder(int $id, string $mountPoint, array $groups): FolderDefinitionWithMappings {
+		return new FolderDefinitionWithMappings($id, $mountPoint, 0, false, false, 1, 1, [], $groups, []);
+	}
+
+	/**
+	 * @return array{displayName: string, permissions: int, type: 'circle'}
+	 */
+	private function circleApplicable(string $displayName = 'Team'): array {
+		return ['displayName' => $displayName, 'permissions' => 31, 'type' => 'circle'];
+	}
+
+	/**
+	 * @return array{displayName: string, permissions: int, type: 'group'}
+	 */
+	private function groupApplicable(string $displayName = 'Group'): array {
+		return ['displayName' => $displayName, 'permissions' => 31, 'type' => 'group'];
+	}
+
+	private function withCircles(): void {
+		$this->folderManager->method('getCirclesManager')->willReturn($this->createMock(CirclesManager::class));
+	}
+
+	public function testStaticIdentity(): void {
+		$this->assertSame('groupfolders', $this->provider->getId());
+		$this->assertSame('Team folders', $this->provider->getName());
+		$this->assertStringContainsString('<svg', $this->provider->getIconSvg());
+	}
+
+	public function testGetSharedWithReturnsOnlyFoldersMappedToTheTeam(): void {
+		$this->withCircles();
+		$this->folderManager->method('getAllFolders')->willReturn([
+			1 => $this->folder(1, 'Design', ['team-1' => $this->circleApplicable('Design Team')]),
+			2 => $this->folder(2, 'Marketing', ['group-x' => $this->groupApplicable()]),
+			3 => $this->folder(3, 'Other', ['team-2' => $this->circleApplicable()]),
+		]);
+
+		$resources = $this->provider->getSharedWith('team-1');
+
+		$this->assertCount(1, $resources);
+		$resource = $resources[0];
+		$this->assertInstanceOf(TeamResource::class, $resource);
+		$this->assertSame('1', $resource->getId());
+		$this->assertSame('Design', $resource->getLabel());
+		$this->assertStringContainsString('dir=/Design', $resource->getUrl());
+		$this->assertStringContainsString('<svg', (string)$resource->getIconSvg());
+	}
+
+	public function testGetSharedWithReturnsEmptyWhenCirclesDisabled(): void {
+		$this->folderManager->method('getCirclesManager')->willReturn(null);
+		$this->folderManager->expects($this->never())->method('getAllFolders');
+
+		$this->assertSame([], $this->provider->getSharedWith('team-1'));
+	}
+
+	public function testIsSharedWithTeam(): void {
+		$this->withCircles();
+		$this->folderManager->method('getAllFolders')->willReturn([
+			5 => $this->folder(5, 'Design', ['team-1' => $this->circleApplicable()]),
+		]);
+
+		$this->assertTrue($this->provider->isSharedWithTeam('team-1', '5'));
+		$this->assertFalse($this->provider->isSharedWithTeam('team-2', '5'));
+		$this->assertFalse($this->provider->isSharedWithTeam('team-1', '99'));
+	}
+
+	public function testIsSharedWithTeamReturnsFalseWhenCirclesDisabled(): void {
+		$this->folderManager->method('getCirclesManager')->willReturn(null);
+
+		$this->assertFalse($this->provider->isSharedWithTeam('team-1', '5'));
+	}
+
+	public function testGetTeamsForResourceReturnsCircleIdsOnly(): void {
+		$this->withCircles();
+		$this->folderManager->method('getAllFolders')->willReturn([
+			7 => $this->folder(7, 'Shared', [
+				'team-1' => $this->circleApplicable(),
+				'group-x' => $this->groupApplicable(),
+				'team-2' => $this->circleApplicable(),
+			]),
+		]);
+
+		$this->assertEqualsCanonicalizing(['team-1', 'team-2'], $this->provider->getTeamsForResource('7'));
+	}
+
+	public function testGetTeamsForResourceReturnsEmptyForUnknownFolder(): void {
+		$this->withCircles();
+		$this->folderManager->method('getAllFolders')->willReturn([]);
+
+		$this->assertSame([], $this->provider->getTeamsForResource('123'));
+	}
+}