diff --git a/src/EntryPoints/REST/ApprovePageApi.php b/src/EntryPoints/REST/ApprovePageApi.php
index 57a4473..f85a76e 100644
--- a/src/EntryPoints/REST/ApprovePageApi.php
+++ b/src/EntryPoints/REST/ApprovePageApi.php
@@ -8,9 +8,11 @@
 use MediaWiki\Rest\Response;
 use MediaWiki\Rest\SimpleHandler;
 use MediaWiki\Revision\RevisionLookup;
+use MediaWiki\User\UserIdentityLookup;
 use ProfessionalWiki\PageApprovals\Adapters\PageHtmlRetriever;
 use ProfessionalWiki\PageApprovals\Application\ApprovalAuthorizer;
 use ProfessionalWiki\PageApprovals\Application\ApprovalLog;
+use ProfessionalWiki\PageApprovals\Application\ApprovalState;
 use ProfessionalWiki\PageApprovals\Application\HtmlRepository;
 use Wikimedia\ParamValidator\ParamValidator;
 use WikiPage;
@@ -23,7 +25,8 @@ public function __construct(
 		private HtmlRepository $htmlRepository,
 		private PageHtmlRetriever $pageHtmlRetriever,
 		private WikiPageFactory $wikiPageFactory,
-		private RevisionLookup $revisionLookup
+		private RevisionLookup $revisionLookup,
+		private UserIdentityLookup $userIdentityLookup
 	) {
 	}
 
@@ -49,7 +52,7 @@ public function run( int $revisionId ): Response {
 			$this->htmlRepository->saveApprovedHtml( $page->getId(), $html );
 		}
 
-		return $this->newSuccessResponse();
+		return $this->newSuccessResponse( $this->approvalLog->getApprovalState( $page->getId() ) );
 	}
 
 	private function getPageFromRevisionId( int $revisionId ): ?WikiPage {
@@ -66,8 +69,23 @@ private function revisionIsLatest( int $revisionId, WikiPage $page ): bool {
 		return $revisionId === $page->getRevisionRecord()?->getId();
 	}
 
-	public function newSuccessResponse(): Response {
-		return $this->getResponseFactory()->createNoContent();
+	public function newSuccessResponse( ?ApprovalState $state ): Response {
+		if ( $state === null ) {
+			return $this->getResponseFactory()->createNoContent();
+		}
+
+		return $this->getResponseFactory()->createJson( [
+			'approvalTimestamp' => $state->approvalTimestamp,
+			'approver' => $this->getUserNameFromUserId( $state->approverId ),
+		] );
+	}
+
+	private function getUserNameFromUserId( ?int $userId ): ?string {
+		if ( $userId === null ) {
+			return null;
+		}
+
+		return $this->userIdentityLookup->getUserIdentityByUserId( $userId )?->getName();
 	}
 
 	public function newAuthorizationFailedResponse(): Response {
diff --git a/src/EntryPoints/REST/UnapprovePageApi.php b/src/EntryPoints/REST/UnapprovePageApi.php
index 59cd474..c2a26e9 100644
--- a/src/EntryPoints/REST/UnapprovePageApi.php
+++ b/src/EntryPoints/REST/UnapprovePageApi.php
@@ -8,8 +8,10 @@
 use MediaWiki\Rest\Response;
 use MediaWiki\Rest\SimpleHandler;
 use MediaWiki\Revision\RevisionLookup;
+use MediaWiki\User\UserIdentityLookup;
 use ProfessionalWiki\PageApprovals\Application\ApprovalAuthorizer;
 use ProfessionalWiki\PageApprovals\Application\ApprovalLog;
+use ProfessionalWiki\PageApprovals\Application\ApprovalState;
 use Wikimedia\ParamValidator\ParamValidator;
 use WikiPage;
 
@@ -19,7 +21,8 @@ public function __construct(
 		private ApprovalAuthorizer $authorizer,
 		private ApprovalLog	$approvalLog,
 		private WikiPageFactory $wikiPageFactory,
-		private RevisionLookup $revisionLookup
+		private RevisionLookup $revisionLookup,
+		private UserIdentityLookup $userIdentityLookup
 	) {
 	}
 
@@ -40,7 +43,7 @@ public function run( int $revisionId ): Response {
 
 		$this->approvalLog->unapprovePage( $page->getId(), $this->getAuthority()->getUser()->getId() );
 
-		return $this->newSuccessResponse();
+		return $this->newSuccessResponse( $this->approvalLog->getApprovalState( $page->getId() ) );
 	}
 
 	private function getPageFromRevisionId( int $revisionId ): ?WikiPage {
@@ -57,8 +60,23 @@ private function revisionIsLatest( int $revisionId, WikiPage $page ): bool {
 		return $revisionId === $page->getRevisionRecord()?->getId();
 	}
 
-	public function newSuccessResponse(): Response {
-		return $this->getResponseFactory()->createNoContent();
+	public function newSuccessResponse( ?ApprovalState $state ): Response {
+		if ( $state === null ) {
+			return $this->getResponseFactory()->createNoContent();
+		}
+
+		return $this->getResponseFactory()->createJson( [
+			'approvalTimestamp' => $state->approvalTimestamp,
+			'approver' => $this->getUserNameFromUserId( $state->approverId ),
+		] );
+	}
+
+	private function getUserNameFromUserId( ?int $userId ): ?string {
+		if ( $userId === null ) {
+			return null;
+		}
+
+		return $this->userIdentityLookup->getUserIdentityByUserId( $userId )?->getName();
 	}
 
 	public function newAuthorizationFailedResponse(): Response {
diff --git a/src/PageApprovals.php b/src/PageApprovals.php
index 5b25ceb..cc036ff 100644
--- a/src/PageApprovals.php
+++ b/src/PageApprovals.php
@@ -39,7 +39,8 @@ public static function newApprovePageApi(): ApprovePageApi {
 			self::getInstance()->getHtmlRepository(),
 			self::getInstance()->getPageHtmlRetriever(),
 			MediaWikiServices::getInstance()->getWikiPageFactory(),
-			MediaWikiServices::getInstance()->getRevisionLookup()
+			MediaWikiServices::getInstance()->getRevisionLookup(),
+			MediaWikiServices::getInstance()->getUserIdentityLookup()
 		);
 	}
 
@@ -48,7 +49,8 @@ public static function newUnapprovePageApi(): UnapprovePageApi {
 			self::getInstance()->newPageApprovalAuthorizer(),
 			self::getInstance()->getApprovalLog(),
 			MediaWikiServices::getInstance()->getWikiPageFactory(),
-			MediaWikiServices::getInstance()->getRevisionLookup()
+			MediaWikiServices::getInstance()->getRevisionLookup(),
+			MediaWikiServices::getInstance()->getUserIdentityLookup()
 		);
 	}
 
diff --git a/tests/EntryPoints/REST/ApprovePageApiTest.php b/tests/EntryPoints/REST/ApprovePageApiTest.php
index 2f0dd2d..25bee1b 100644
--- a/tests/EntryPoints/REST/ApprovePageApiTest.php
+++ b/tests/EntryPoints/REST/ApprovePageApiTest.php
@@ -33,12 +33,24 @@ protected function setUp(): void {
 	}
 
 	public function testApprovePageHappyPath(): void {
+		$user = $this->getTestUser();
+		$page = $this->createPageWithCategories()->getRevisionRecord();
+
 		$response = $this->executeHandler(
 			$this->newApprovePageApi(),
-			$this->createValidRequestData( $this->createPageWithCategories()->getRevisionRecord()->getId() ),
+			$this->createValidRequestData( $page->getId() ),
+			authority: $user->getAuthority()
 		);
+		$state = $this->approvalLog->getApprovalState( $page->getId() );
 
-		$this->assertSame( 204, $response->getStatusCode() );
+		$this->assertSame( 200, $response->getStatusCode() );
+		$this->assertSame(
+			[
+				'approvalTimestamp' => $state->approvalTimestamp,
+				'approver' => $user->getUser()->getName(),
+			],
+			json_decode( $response->getBody()->getContents(), true )
+		);
 	}
 
 	private function newApprovePageApi(): ApprovePageApi {
@@ -48,7 +60,8 @@ private function newApprovePageApi(): ApprovePageApi {
 			$this->htmlRepository,
 			$this->newPageHtmlRetriever(),
 			$this->getServiceContainer()->getWikiPageFactory(),
-			$this->getServiceContainer()->getRevisionLookup()
+			$this->getServiceContainer()->getRevisionLookup(),
+			$this->getServiceContainer()->getUserIdentityLookup()
 		);
 	}
 
@@ -84,7 +97,8 @@ private function newApprovePageApiWithFailingAuthorizer(): ApprovePageApi {
 			$this->htmlRepository,
 			$this->newPageHtmlRetriever(),
 			$this->getServiceContainer()->getWikiPageFactory(),
-			$this->getServiceContainer()->getRevisionLookup()
+			$this->getServiceContainer()->getRevisionLookup(),
+			$this->getServiceContainer()->getUserIdentityLookup()
 		);
 	}
 
diff --git a/tests/EntryPoints/REST/UnapprovePageApiTest.php b/tests/EntryPoints/REST/UnapprovePageApiTest.php
index 7cab74d..b0118a3 100644
--- a/tests/EntryPoints/REST/UnapprovePageApiTest.php
+++ b/tests/EntryPoints/REST/UnapprovePageApiTest.php
@@ -20,21 +20,45 @@ class UnapprovePageApiTest extends PageApprovalsIntegrationTest {
 	use HandlerTestTrait;
 	use MockAuthorityTrait;
 
+	private InMemoryApprovalLog $approvalLog;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->approvalLog = new InMemoryApprovalLog();
+	}
+
 	public function testUnapprovePageHappyPath(): void {
+		$user = $this->getTestUser();
+		$page = $this->createPageWithCategories();
+
+		$this->approvalLog->approvePage( $page->getId(), 1 );
+
 		$response = $this->executeHandler(
 			$this->newUnapprovePageApi(),
-			$this->createValidRequestData( $this->createPageWithCategories()->getRevisionRecord()->getId() ),
+			$this->createValidRequestData( $page->getRevisionRecord()->getId() ),
+			authority: $user->getAuthority()
 		);
 
-		$this->assertSame( 204, $response->getStatusCode() );
+		$state = $this->approvalLog->getApprovalState( $page->getId() );
+
+		$this->assertSame( 200, $response->getStatusCode() );
+		$this->assertSame(
+			[
+				'approvalTimestamp' => $state->approvalTimestamp,
+				'approver' => $user->getUser()->getName(),
+			],
+			json_decode( $response->getBody()->getContents(), true )
+		);
 	}
 
-	private function newUnapprovePageApi( ?ApprovalLog $approvalLog = null ): UnapprovePageApi {
+	private function newUnapprovePageApi(): UnapprovePageApi {
 		return new UnapprovePageApi(
 			new SucceedingApprovalAuthorizer(),
-			$approvalLog ?? new InMemoryApprovalLog(),
+			$this->approvalLog,
 			$this->getServiceContainer()->getWikiPageFactory(),
-			$this->getServiceContainer()->getRevisionLookup()
+			$this->getServiceContainer()->getRevisionLookup(),
+			$this->getServiceContainer()->getUserIdentityLookup()
 		);
 	}
 
@@ -64,7 +88,8 @@ private function newUnapprovePageApiWithFailingAuthorizer( ?ApprovalLog $approva
 			new FailingApprovalAuthorizer(),
 			$approvalLog ?? new InMemoryApprovalLog(),
 			$this->getServiceContainer()->getWikiPageFactory(),
-			$this->getServiceContainer()->getRevisionLookup()
+			$this->getServiceContainer()->getRevisionLookup(),
+			$this->getServiceContainer()->getUserIdentityLookup()
 		);
 	}
 
@@ -78,37 +103,35 @@ public function testUnapprovalFailsForMissingPageId(): void {
 	}
 
 	public function testPageIsUnapproved(): void {
-		$approvalLog = new InMemoryApprovalLog();
 		$page = $this->createPageWithCategories();
 
-		$approvalLog->approvePage( $page->getId(), 1 );
+		$this->approvalLog->approvePage( $page->getId(), 1 );
 
 		$this->executeHandler(
-			$this->newUnapprovePageApi( $approvalLog ),
+			$this->newUnapprovePageApi(),
 			$this->createValidRequestData( $page->getRevisionRecord()->getId() ),
 		);
 
 		$this->assertFalse(
-			$approvalLog->getApprovalState( $page->getId() )->isApproved
+			$this->approvalLog->getApprovalState( $page->getId() )->isApproved
 		);
 	}
 
 	public function testAPIUserIsInApprovalState(): void {
-		$approvalLog = new InMemoryApprovalLog();
 		$page = $this->createPageWithCategories();
 		$user = $this->mockRegisteredUltimateAuthority();
 
-		$approvalLog->approvePage( $page->getId(), 1 );
+		$this->approvalLog->approvePage( $page->getId(), 1 );
 
 		$this->executeHandler(
-			$this->newUnapprovePageApi( $approvalLog ),
+			$this->newUnapprovePageApi(),
 			$this->createValidRequestData( $page->getRevisionRecord()->getId() ),
 			authority: $user
 		);
 
 		$this->assertSame(
 			$user->getUser()->getId(),
-			$approvalLog->getApprovalState( $page->getId() )->approverId
+			$this->approvalLog->getApprovalState( $page->getId() )->approverId
 		);
 	}