diff --git a/include/api.php b/include/api.php
index f5f9b50c34..b1030335d6 100644
--- a/include/api.php
+++ b/include/api.php
@@ -3626,6 +3626,7 @@ api_register_func('api/statusnet/version', 'api_statusnet_version', false);
  *
  * @param string $type Return type (atom, rss, xml, json)
  *
+ * @param int $rel A contact relationship constant
  * @return array|string|void
  * @throws BadRequestException
  * @throws ForbiddenException
@@ -3634,7 +3635,7 @@ api_register_func('api/statusnet/version', 'api_statusnet_version', false);
  * @throws UnauthorizedException
  * @todo use api_format_data() to return data
  */
-function api_ff_ids($type)
+function api_ff_ids($type, int $rel)
 {
 	if (!api_user()) {
 		throw new ForbiddenException();
@@ -3646,26 +3647,29 @@ function api_ff_ids($type)
 
 	$stringify_ids = $_REQUEST['stringify_ids'] ?? false;
 
-	$r = q(
-		"SELECT `pcontact`.`id` FROM `contact`
-			INNER JOIN `contact` AS `pcontact` ON `contact`.`nurl` = `pcontact`.`nurl` AND `pcontact`.`uid` = 0
-			WHERE `contact`.`uid` = %s AND NOT `contact`.`self`",
-		intval(api_user())
+	$contacts = DBA::p("SELECT `pcontact`.`id`
+		FROM `contact`
+		INNER JOIN `contact` AS `pcontact`
+		    ON `contact`.`nurl` = `pcontact`.`nurl`
+		    AND `pcontact`.`uid` = 0
+		WHERE `contact`.`uid` = ?
+		AND NOT `contact`.`self`
+		AND `contact`.`rel` IN (?, ?)",
+		api_user(),
+		$rel,
+		Contact::FRIEND
 	);
-	if (!DBA::isResult($r)) {
-		return;
-	}
 
 	$ids = [];
-	foreach ($r as $rr) {
+	foreach (DBA::toArray($contacts) as $contact) {
 		if ($stringify_ids) {
-			$ids[] = $rr['id'];
+			$ids[] = $contact['id'];
 		} else {
-			$ids[] = intval($rr['id']);
+			$ids[] = intval($contact['id']);
 		}
 	}
 
-	return api_format_data("ids", $type, ['id' => $ids]);
+	return api_format_data('ids', $type, ['id' => $ids]);
 }
 
 /**
@@ -3676,11 +3680,14 @@ function api_ff_ids($type)
  * @return array|string
  * @throws BadRequestException
  * @throws ForbiddenException
+ * @throws ImagickException
+ * @throws InternalServerErrorException
+ * @throws UnauthorizedException
  * @see https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-friends-ids
  */
 function api_friends_ids($type)
 {
-	return api_ff_ids($type);
+	return api_ff_ids($type, Contact::SHARING);
 }
 
 /**
@@ -3691,11 +3698,14 @@ function api_friends_ids($type)
  * @return array|string
  * @throws BadRequestException
  * @throws ForbiddenException
+ * @throws ImagickException
+ * @throws InternalServerErrorException
+ * @throws UnauthorizedException
  * @see https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-ids
  */
 function api_followers_ids($type)
 {
-	return api_ff_ids($type);
+	return api_ff_ids($type, Contact::FOLLOWER);
 }
 
 /// @TODO move to top of file or somewhere better
diff --git a/tests/include/ApiTest.php b/tests/include/ApiTest.php
index 245529fb21..fc797ec3f0 100644
--- a/tests/include/ApiTest.php
+++ b/tests/include/ApiTest.php
@@ -13,6 +13,7 @@ use Friendica\Core\Config\PConfiguration;
 use Friendica\Core\Protocol;
 use Friendica\Core\System;
 use Friendica\Database\Database;
+use Friendica\Model\Contact;
 use Friendica\Network\HTTPException;
 use Friendica\Test\Util\Database\StaticDatabase;
 use Monolog\Handler\TestHandler;
@@ -2922,8 +2923,8 @@ class ApiTest extends DatabaseTest
 	 */
 	public function testApiFfIds()
 	{
-		$result = api_ff_ids('json');
-		$this->assertNull($result);
+		$result = api_ff_ids('json', Contact::FOLLOWER);
+		$this->assertEquals(['id' => []], $result);
 	}
 
 	/**
@@ -2945,7 +2946,7 @@ class ApiTest extends DatabaseTest
 	public function testApiFfIdsWithoutAuthenticatedUser()
 	{
 		$_SESSION['authenticated'] = false;
-		api_ff_ids('json');
+		api_ff_ids('json', Contact::FOLLOWER);
 	}
 
 	/**
@@ -2956,7 +2957,7 @@ class ApiTest extends DatabaseTest
 	public function testApiFriendsIds()
 	{
 		$result = api_friends_ids('json');
-		$this->assertNull($result);
+		$this->assertEquals(['id' => []], $result);
 	}
 
 	/**
@@ -2967,7 +2968,7 @@ class ApiTest extends DatabaseTest
 	public function testApiFollowersIds()
 	{
 		$result = api_followers_ids('json');
-		$this->assertNull($result);
+		$this->assertEquals(['id' => []], $result);
 	}
 
 	/**