diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99614a6e..f8d58fb8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com), and this
   Non-error responses are not affected.
 
 * [#1513](https://github.com/shlinkio/shlink/issues/1513) Added publishing of the docker image in GHCR.
+* [#1114](https://github.com/shlinkio/shlink/issues/1114) Added support to provide an initial API key via `INITIAL_API_KEY` env var, when running Shlink with openswoole or RoadRunner.
+
+  Also, the installer tool now allows to generate an initial API key that can be copy-pasted (this tool is run interactively), in case you use php-fpm or you don't want to use env vars.
 
 ### Changed
 * [#1339](https://github.com/shlinkio/shlink/issues/1339) Added new test suite for CLI E2E tests.
diff --git a/composer.json b/composer.json
index a9b60f12..a5bc5b62 100644
--- a/composer.json
+++ b/composer.json
@@ -47,7 +47,7 @@
         "shlinkio/shlink-config": "dev-main#33004e6 as 2.1",
         "shlinkio/shlink-event-dispatcher": "dev-main#48c0137 as 2.6",
         "shlinkio/shlink-importer": "^4.0",
-        "shlinkio/shlink-installer": "dev-develop#f1cc5c7 as 8.2",
+        "shlinkio/shlink-installer": "dev-develop#a01bca9 as 8.2",
         "shlinkio/shlink-ip-geolocation": "^3.0",
         "spiral/roadrunner": "^2.11",
         "spiral/roadrunner-jobs": "^2.3",
@@ -92,6 +92,7 @@
             "ShlinkioCliTest\\Shlink\\CLI\\": "module/CLI/test-cli",
             "ShlinkioTest\\Shlink\\Rest\\": "module/Rest/test",
             "ShlinkioApiTest\\Shlink\\Rest\\": "module/Rest/test-api",
+            "ShlinkioDbTest\\Shlink\\Rest\\": "module/Rest/test-db",
             "ShlinkioTest\\Shlink\\Core\\": "module/Core/test",
             "ShlinkioDbTest\\Shlink\\Core\\": "module/Core/test-db"
         },
diff --git a/config/autoload/common.global.php b/config/autoload/common.global.php
index b35807fd..19404d8c 100644
--- a/config/autoload/common.global.php
+++ b/config/autoload/common.global.php
@@ -8,8 +8,8 @@ return [
 
     'debug' => false,
 
-    // Disabling config cache for cli, ensures it's never used for openswoole and also that console commands don't
-    // generate a cache file that's then used by non-openswoole web executions
+    // Disabling config cache for cli, ensures it's never used for openswoole/RoadRunner, and also that console
+    // commands don't generate a cache file that's then used by php-fpm web executions
     ConfigAggregator::ENABLE_CACHE => PHP_SAPI !== 'cli',
 
 ];
diff --git a/config/autoload/installer.global.php b/config/autoload/installer.global.php
index 40c2f4bd..fbc5fa03 100644
--- a/config/autoload/installer.global.php
+++ b/config/autoload/installer.global.php
@@ -82,6 +82,9 @@ return [
             InstallationCommand::GEOLITE_DOWNLOAD_DB->value => [
                 'command' => 'bin/cli ' . Command\Visit\DownloadGeoLiteDbCommand::NAME,
             ],
+            InstallationCommand::API_KEY_GENERATE->value => [
+                'command' => 'bin/cli ' . Command\Api\GenerateKeyCommand::NAME,
+            ],
         ],
     ],
 
diff --git a/module/CLI/test/Command/Api/DisableKeyCommandTest.php b/module/CLI/test/Command/Api/DisableKeyCommandTest.php
index 90942dc9..41a4f982 100644
--- a/module/CLI/test/Command/Api/DisableKeyCommandTest.php
+++ b/module/CLI/test/Command/Api/DisableKeyCommandTest.php
@@ -19,7 +19,7 @@ class DisableKeyCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $apiKeyService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->apiKeyService = $this->prophesize(ApiKeyServiceInterface::class);
         $this->commandTester = $this->testerForCommand(new DisableKeyCommand($this->apiKeyService->reveal()));
diff --git a/module/CLI/test/Command/Api/GenerateKeyCommandTest.php b/module/CLI/test/Command/Api/GenerateKeyCommandTest.php
index e5c543d5..6db8581b 100644
--- a/module/CLI/test/Command/Api/GenerateKeyCommandTest.php
+++ b/module/CLI/test/Command/Api/GenerateKeyCommandTest.php
@@ -23,7 +23,7 @@ class GenerateKeyCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $apiKeyService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->apiKeyService = $this->prophesize(ApiKeyServiceInterface::class);
         $roleResolver = $this->prophesize(RoleResolverInterface::class);
diff --git a/module/CLI/test/Command/Api/ListKeysCommandTest.php b/module/CLI/test/Command/Api/ListKeysCommandTest.php
index 68c1e844..7122f392 100644
--- a/module/CLI/test/Command/Api/ListKeysCommandTest.php
+++ b/module/CLI/test/Command/Api/ListKeysCommandTest.php
@@ -23,7 +23,7 @@ class ListKeysCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $apiKeyService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->apiKeyService = $this->prophesize(ApiKeyServiceInterface::class);
         $this->commandTester = $this->testerForCommand(new ListKeysCommand($this->apiKeyService->reveal()));
diff --git a/module/CLI/test/Command/Db/CreateDatabaseCommandTest.php b/module/CLI/test/Command/Db/CreateDatabaseCommandTest.php
index 93e07d4d..f500775a 100644
--- a/module/CLI/test/Command/Db/CreateDatabaseCommandTest.php
+++ b/module/CLI/test/Command/Db/CreateDatabaseCommandTest.php
@@ -33,7 +33,7 @@ class CreateDatabaseCommandTest extends TestCase
     private ObjectProphecy $schemaManager;
     private ObjectProphecy $driver;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $locker = $this->prophesize(LockFactory::class);
         $lock = $this->prophesize(LockInterface::class);
diff --git a/module/CLI/test/Command/Db/MigrateDatabaseCommandTest.php b/module/CLI/test/Command/Db/MigrateDatabaseCommandTest.php
index d301f55e..1a8dfb0e 100644
--- a/module/CLI/test/Command/Db/MigrateDatabaseCommandTest.php
+++ b/module/CLI/test/Command/Db/MigrateDatabaseCommandTest.php
@@ -23,7 +23,7 @@ class MigrateDatabaseCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $processHelper;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $locker = $this->prophesize(LockFactory::class);
         $lock = $this->prophesize(LockInterface::class);
diff --git a/module/CLI/test/Command/Domain/DomainRedirectsCommandTest.php b/module/CLI/test/Command/Domain/DomainRedirectsCommandTest.php
index 6b6e1036..afcce551 100644
--- a/module/CLI/test/Command/Domain/DomainRedirectsCommandTest.php
+++ b/module/CLI/test/Command/Domain/DomainRedirectsCommandTest.php
@@ -24,7 +24,7 @@ class DomainRedirectsCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $domainService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->domainService = $this->prophesize(DomainServiceInterface::class);
         $this->commandTester = $this->testerForCommand(new DomainRedirectsCommand($this->domainService->reveal()));
diff --git a/module/CLI/test/Command/Domain/ListDomainsCommandTest.php b/module/CLI/test/Command/Domain/ListDomainsCommandTest.php
index 6d56ea69..adaa1d00 100644
--- a/module/CLI/test/Command/Domain/ListDomainsCommandTest.php
+++ b/module/CLI/test/Command/Domain/ListDomainsCommandTest.php
@@ -23,7 +23,7 @@ class ListDomainsCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $domainService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->domainService = $this->prophesize(DomainServiceInterface::class);
         $this->commandTester = $this->testerForCommand(new ListDomainsCommand($this->domainService->reveal()));
diff --git a/module/CLI/test/Command/ShortUrl/CreateShortUrlCommandTest.php b/module/CLI/test/Command/ShortUrl/CreateShortUrlCommandTest.php
index 73d2b785..e529f0ad 100644
--- a/module/CLI/test/Command/ShortUrl/CreateShortUrlCommandTest.php
+++ b/module/CLI/test/Command/ShortUrl/CreateShortUrlCommandTest.php
@@ -30,7 +30,7 @@ class CreateShortUrlCommandTest extends TestCase
     private ObjectProphecy $urlShortener;
     private ObjectProphecy $stringifier;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->urlShortener = $this->prophesize(UrlShortener::class);
         $this->stringifier = $this->prophesize(ShortUrlStringifierInterface::class);
diff --git a/module/CLI/test/Command/ShortUrl/DeleteShortUrlCommandTest.php b/module/CLI/test/Command/ShortUrl/DeleteShortUrlCommandTest.php
index 947b7443..80d4878c 100644
--- a/module/CLI/test/Command/ShortUrl/DeleteShortUrlCommandTest.php
+++ b/module/CLI/test/Command/ShortUrl/DeleteShortUrlCommandTest.php
@@ -26,7 +26,7 @@ class DeleteShortUrlCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $service;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->service = $this->prophesize(DeleteShortUrlServiceInterface::class);
         $this->commandTester = $this->testerForCommand(new DeleteShortUrlCommand($this->service->reveal()));
diff --git a/module/CLI/test/Command/ShortUrl/GetShortUrlVisitsCommandTest.php b/module/CLI/test/Command/ShortUrl/GetShortUrlVisitsCommandTest.php
index 316c762e..644a0b8f 100644
--- a/module/CLI/test/Command/ShortUrl/GetShortUrlVisitsCommandTest.php
+++ b/module/CLI/test/Command/ShortUrl/GetShortUrlVisitsCommandTest.php
@@ -33,7 +33,7 @@ class GetShortUrlVisitsCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $visitsHelper;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->visitsHelper = $this->prophesize(VisitsStatsHelperInterface::class);
         $command = new GetShortUrlVisitsCommand($this->visitsHelper->reveal());
diff --git a/module/CLI/test/Command/ShortUrl/ListShortUrlsCommandTest.php b/module/CLI/test/Command/ShortUrl/ListShortUrlsCommandTest.php
index f9d701cb..51b02799 100644
--- a/module/CLI/test/Command/ShortUrl/ListShortUrlsCommandTest.php
+++ b/module/CLI/test/Command/ShortUrl/ListShortUrlsCommandTest.php
@@ -33,7 +33,7 @@ class ListShortUrlsCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $shortUrlService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->shortUrlService = $this->prophesize(ShortUrlServiceInterface::class);
         $command = new ListShortUrlsCommand($this->shortUrlService->reveal(), new ShortUrlDataTransformer(
diff --git a/module/CLI/test/Command/ShortUrl/ResolveUrlCommandTest.php b/module/CLI/test/Command/ShortUrl/ResolveUrlCommandTest.php
index 12e29eaf..24974692 100644
--- a/module/CLI/test/Command/ShortUrl/ResolveUrlCommandTest.php
+++ b/module/CLI/test/Command/ShortUrl/ResolveUrlCommandTest.php
@@ -25,7 +25,7 @@ class ResolveUrlCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $urlResolver;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->urlResolver = $this->prophesize(ShortUrlResolverInterface::class);
         $this->commandTester = $this->testerForCommand(new ResolveUrlCommand($this->urlResolver->reveal()));
diff --git a/module/CLI/test/Command/Tag/DeleteTagsCommandTest.php b/module/CLI/test/Command/Tag/DeleteTagsCommandTest.php
index 46f61814..b03bf1ee 100644
--- a/module/CLI/test/Command/Tag/DeleteTagsCommandTest.php
+++ b/module/CLI/test/Command/Tag/DeleteTagsCommandTest.php
@@ -18,7 +18,7 @@ class DeleteTagsCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $tagService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->tagService = $this->prophesize(TagServiceInterface::class);
         $this->commandTester = $this->testerForCommand(new DeleteTagsCommand($this->tagService->reveal()));
diff --git a/module/CLI/test/Command/Tag/ListTagsCommandTest.php b/module/CLI/test/Command/Tag/ListTagsCommandTest.php
index 499442d0..58ae1ef1 100644
--- a/module/CLI/test/Command/Tag/ListTagsCommandTest.php
+++ b/module/CLI/test/Command/Tag/ListTagsCommandTest.php
@@ -22,7 +22,7 @@ class ListTagsCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $tagService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->tagService = $this->prophesize(TagServiceInterface::class);
         $this->commandTester = $this->testerForCommand(new ListTagsCommand($this->tagService->reveal()));
diff --git a/module/CLI/test/Command/Tag/RenameTagCommandTest.php b/module/CLI/test/Command/Tag/RenameTagCommandTest.php
index 3a52aba3..4d647fe7 100644
--- a/module/CLI/test/Command/Tag/RenameTagCommandTest.php
+++ b/module/CLI/test/Command/Tag/RenameTagCommandTest.php
@@ -21,7 +21,7 @@ class RenameTagCommandTest extends TestCase
     private CommandTester $commandTester;
     private ObjectProphecy $tagService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->tagService = $this->prophesize(TagServiceInterface::class);
         $this->commandTester = $this->testerForCommand(new RenameTagCommand($this->tagService->reveal()));
diff --git a/module/CLI/test/Command/Visit/LocateVisitsCommandTest.php b/module/CLI/test/Command/Visit/LocateVisitsCommandTest.php
index fa666516..4111c1dc 100644
--- a/module/CLI/test/Command/Visit/LocateVisitsCommandTest.php
+++ b/module/CLI/test/Command/Visit/LocateVisitsCommandTest.php
@@ -40,7 +40,7 @@ class LocateVisitsCommandTest extends TestCase
     private ObjectProphecy $lock;
     private ObjectProphecy $downloadDbCommand;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->visitService = $this->prophesize(VisitLocator::class);
         $this->ipResolver = $this->prophesize(IpLocationResolverInterface::class);
diff --git a/module/CLI/test/ConfigProviderTest.php b/module/CLI/test/ConfigProviderTest.php
index 863b8a1f..f01649e0 100644
--- a/module/CLI/test/ConfigProviderTest.php
+++ b/module/CLI/test/ConfigProviderTest.php
@@ -12,7 +12,7 @@ class ConfigProviderTest extends TestCase
 {
     private ConfigProvider $configProvider;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->configProvider = new ConfigProvider();
     }
diff --git a/module/CLI/test/Factory/ApplicationFactoryTest.php b/module/CLI/test/Factory/ApplicationFactoryTest.php
index fbb5ace9..cb08a692 100644
--- a/module/CLI/test/Factory/ApplicationFactoryTest.php
+++ b/module/CLI/test/Factory/ApplicationFactoryTest.php
@@ -16,7 +16,7 @@ class ApplicationFactoryTest extends TestCase
 
     private ApplicationFactory $factory;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->factory = new ApplicationFactory();
     }
diff --git a/module/CLI/test/Util/GeolocationDbUpdaterTest.php b/module/CLI/test/Util/GeolocationDbUpdaterTest.php
index c5e3bdb4..fde39775 100644
--- a/module/CLI/test/Util/GeolocationDbUpdaterTest.php
+++ b/module/CLI/test/Util/GeolocationDbUpdaterTest.php
@@ -32,7 +32,7 @@ class GeolocationDbUpdaterTest extends TestCase
     private TrackingOptions $trackingOptions;
     private ObjectProphecy $lock;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->dbUpdater = $this->prophesize(DbUpdaterInterface::class);
         $this->geoLiteDbReader = $this->prophesize(Reader::class);
diff --git a/module/CLI/test/Util/ShlinkTableTest.php b/module/CLI/test/Util/ShlinkTableTest.php
index 1ca612d4..ffe1f30d 100644
--- a/module/CLI/test/Util/ShlinkTableTest.php
+++ b/module/CLI/test/Util/ShlinkTableTest.php
@@ -21,7 +21,7 @@ class ShlinkTableTest extends TestCase
     private ShlinkTable $shlinkTable;
     private ObjectProphecy $baseTable;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->baseTable = $this->prophesize(Table::class);
         $this->shlinkTable = ShlinkTable::fromBaseTable($this->baseTable->reveal());
diff --git a/module/Core/src/Config/EnvVars.php b/module/Core/src/Config/EnvVars.php
index 7cbd0af4..228a5921 100644
--- a/module/Core/src/Config/EnvVars.php
+++ b/module/Core/src/Config/EnvVars.php
@@ -47,6 +47,7 @@ enum EnvVars: string
     case PORT = 'PORT';
     case TASK_WORKER_NUM = 'TASK_WORKER_NUM';
     case WEB_WORKER_NUM = 'WEB_WORKER_NUM';
+    case INITIAL_API_KEY = 'INITIAL_API_KEY';
     case ANONYMIZE_REMOTE_ADDR = 'ANONYMIZE_REMOTE_ADDR';
     case TRACK_ORPHAN_VISITS = 'TRACK_ORPHAN_VISITS';
     case DISABLE_TRACK_PARAM = 'DISABLE_TRACK_PARAM';
diff --git a/module/Core/src/Repository/TagRepository.php b/module/Core/src/Repository/TagRepository.php
index 2c4e8db6..946cee7e 100644
--- a/module/Core/src/Repository/TagRepository.php
+++ b/module/Core/src/Repository/TagRepository.php
@@ -110,7 +110,7 @@ class TagRepository extends EntitySpecificationRepository implements TagReposito
 
         return map(
             $this->getEntityManager()->createNativeQuery($nativeQb->getSQL(), $rsm)->getResult(),
-            static fn (array $row) => new TagInfo($row['tag'], (int) $row['shortUrlsCount'], (int) $row['visitsCount']),
+            TagInfo::fromRawData(...),
         );
     }
 
diff --git a/module/Core/src/Tag/Model/TagInfo.php b/module/Core/src/Tag/Model/TagInfo.php
index 8a4f196b..5e71ea5b 100644
--- a/module/Core/src/Tag/Model/TagInfo.php
+++ b/module/Core/src/Tag/Model/TagInfo.php
@@ -15,6 +15,11 @@ final class TagInfo implements JsonSerializable
     ) {
     }
 
+    public static function fromRawData(array $data): self
+    {
+        return new self($data['tag'], (int) $data['shortUrlsCount'], (int) $data['visitsCount']);
+    }
+
     public function jsonSerialize(): array
     {
         return [
diff --git a/module/Core/src/Tag/Model/TagsParams.php b/module/Core/src/Tag/Model/TagsParams.php
index 633fd5f2..3b1d84b2 100644
--- a/module/Core/src/Tag/Model/TagsParams.php
+++ b/module/Core/src/Tag/Model/TagsParams.php
@@ -14,6 +14,7 @@ final class TagsParams extends AbstractInfinitePaginableListParams
     private function __construct(
         public readonly ?string $searchTerm,
         public readonly Ordering $orderBy,
+        /** @deprecated */
         public readonly bool $withStats,
         ?int $page,
         ?int $itemsPerPage,
diff --git a/module/Core/test/Action/PixelActionTest.php b/module/Core/test/Action/PixelActionTest.php
index fdd291a5..2972d4fd 100644
--- a/module/Core/test/Action/PixelActionTest.php
+++ b/module/Core/test/Action/PixelActionTest.php
@@ -25,7 +25,7 @@ class PixelActionTest extends TestCase
     private ObjectProphecy $urlResolver;
     private ObjectProphecy $requestTracker;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->urlResolver = $this->prophesize(ShortUrlResolverInterface::class);
         $this->requestTracker = $this->prophesize(RequestTrackerInterface::class);
diff --git a/module/Core/test/Action/QrCodeActionTest.php b/module/Core/test/Action/QrCodeActionTest.php
index fb9e4e6a..1962fdc7 100644
--- a/module/Core/test/Action/QrCodeActionTest.php
+++ b/module/Core/test/Action/QrCodeActionTest.php
@@ -39,7 +39,7 @@ class QrCodeActionTest extends TestCase
     private ObjectProphecy $urlResolver;
     private QrCodeOptions $options;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $router = $this->prophesize(RouterInterface::class);
         $router->generateUri(Argument::cetera())->willReturn('/foo/bar');
diff --git a/module/Core/test/Action/RedirectActionTest.php b/module/Core/test/Action/RedirectActionTest.php
index cde2b9aa..aa2c9d07 100644
--- a/module/Core/test/Action/RedirectActionTest.php
+++ b/module/Core/test/Action/RedirectActionTest.php
@@ -31,7 +31,7 @@ class RedirectActionTest extends TestCase
     private ObjectProphecy $requestTracker;
     private ObjectProphecy $redirectRespHelper;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->urlResolver = $this->prophesize(ShortUrlResolverInterface::class);
         $this->requestTracker = $this->prophesize(RequestTrackerInterface::class);
diff --git a/module/Core/test/Config/BasePathPrefixerTest.php b/module/Core/test/Config/BasePathPrefixerTest.php
index 36b038c8..2298a59c 100644
--- a/module/Core/test/Config/BasePathPrefixerTest.php
+++ b/module/Core/test/Config/BasePathPrefixerTest.php
@@ -11,7 +11,7 @@ class BasePathPrefixerTest extends TestCase
 {
     private BasePathPrefixer $prefixer;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->prefixer = new BasePathPrefixer();
     }
diff --git a/module/Core/test/ConfigProviderTest.php b/module/Core/test/ConfigProviderTest.php
index 33714f88..3bb0dbb4 100644
--- a/module/Core/test/ConfigProviderTest.php
+++ b/module/Core/test/ConfigProviderTest.php
@@ -12,7 +12,7 @@ class ConfigProviderTest extends TestCase
 {
     private ConfigProvider $configProvider;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->configProvider = new ConfigProvider();
     }
diff --git a/module/Core/test/Domain/DomainServiceTest.php b/module/Core/test/Domain/DomainServiceTest.php
index ea3cfe02..43a052ae 100644
--- a/module/Core/test/Domain/DomainServiceTest.php
+++ b/module/Core/test/Domain/DomainServiceTest.php
@@ -27,7 +27,7 @@ class DomainServiceTest extends TestCase
     private DomainService $domainService;
     private ObjectProphecy $em;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManagerInterface::class);
         $this->domainService = new DomainService($this->em->reveal(), 'default.com');
diff --git a/module/Core/test/ErrorHandler/NotFoundRedirectHandlerTest.php b/module/Core/test/ErrorHandler/NotFoundRedirectHandlerTest.php
index 70063764..d40fce56 100644
--- a/module/Core/test/ErrorHandler/NotFoundRedirectHandlerTest.php
+++ b/module/Core/test/ErrorHandler/NotFoundRedirectHandlerTest.php
@@ -31,7 +31,7 @@ class NotFoundRedirectHandlerTest extends TestCase
     private ObjectProphecy $next;
     private ServerRequestInterface $req;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->redirectOptions = new NotFoundRedirectOptions();
         $this->resolver = $this->prophesize(NotFoundRedirectResolverInterface::class);
diff --git a/module/Core/test/ErrorHandler/NotFoundTemplateHandlerTest.php b/module/Core/test/ErrorHandler/NotFoundTemplateHandlerTest.php
index dcf42b54..12865171 100644
--- a/module/Core/test/ErrorHandler/NotFoundTemplateHandlerTest.php
+++ b/module/Core/test/ErrorHandler/NotFoundTemplateHandlerTest.php
@@ -21,7 +21,7 @@ class NotFoundTemplateHandlerTest extends TestCase
     private NotFoundTemplateHandler $handler;
     private bool $readFileCalled;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->readFileCalled = false;
         $readFile = function (string $fileName): string {
diff --git a/module/Core/test/EventDispatcher/CloseDbConnectionEventListenerDelegatorTest.php b/module/Core/test/EventDispatcher/CloseDbConnectionEventListenerDelegatorTest.php
index c928200e..b826802b 100644
--- a/module/Core/test/EventDispatcher/CloseDbConnectionEventListenerDelegatorTest.php
+++ b/module/Core/test/EventDispatcher/CloseDbConnectionEventListenerDelegatorTest.php
@@ -18,7 +18,7 @@ class CloseDbConnectionEventListenerDelegatorTest extends TestCase
     private CloseDbConnectionEventListenerDelegator $delegator;
     private ObjectProphecy $container;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->container = $this->prophesize(ContainerInterface::class);
         $this->delegator = new CloseDbConnectionEventListenerDelegator();
diff --git a/module/Core/test/EventDispatcher/CloseDbConnectionEventListenerTest.php b/module/Core/test/EventDispatcher/CloseDbConnectionEventListenerTest.php
index d0c7c374..7c4d74c8 100644
--- a/module/Core/test/EventDispatcher/CloseDbConnectionEventListenerTest.php
+++ b/module/Core/test/EventDispatcher/CloseDbConnectionEventListenerTest.php
@@ -20,7 +20,7 @@ class CloseDbConnectionEventListenerTest extends TestCase
 
     private ObjectProphecy $em;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(ReopeningEntityManagerInterface::class);
     }
diff --git a/module/Core/test/EventDispatcher/LocateVisitTest.php b/module/Core/test/EventDispatcher/LocateVisitTest.php
index 09a8086d..5cf243d0 100644
--- a/module/Core/test/EventDispatcher/LocateVisitTest.php
+++ b/module/Core/test/EventDispatcher/LocateVisitTest.php
@@ -36,7 +36,7 @@ class LocateVisitTest extends TestCase
     private ObjectProphecy $dbUpdater;
     private ObjectProphecy $eventDispatcher;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->ipLocationResolver = $this->prophesize(IpLocationResolverInterface::class);
         $this->em = $this->prophesize(EntityManagerInterface::class);
diff --git a/module/Core/test/EventDispatcher/Mercure/NotifyVisitToMercureTest.php b/module/Core/test/EventDispatcher/Mercure/NotifyVisitToMercureTest.php
index 1ce29d0d..0d8d9cfa 100644
--- a/module/Core/test/EventDispatcher/Mercure/NotifyVisitToMercureTest.php
+++ b/module/Core/test/EventDispatcher/Mercure/NotifyVisitToMercureTest.php
@@ -31,7 +31,7 @@ class NotifyVisitToMercureTest extends TestCase
     private ObjectProphecy $em;
     private ObjectProphecy $logger;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->helper = $this->prophesize(PublishingHelperInterface::class);
         $this->updatesGenerator = $this->prophesize(PublishingUpdatesGeneratorInterface::class);
diff --git a/module/Core/test/EventDispatcher/NotifyVisitToWebHooksTest.php b/module/Core/test/EventDispatcher/NotifyVisitToWebHooksTest.php
index 56324e40..6be8719a 100644
--- a/module/Core/test/EventDispatcher/NotifyVisitToWebHooksTest.php
+++ b/module/Core/test/EventDispatcher/NotifyVisitToWebHooksTest.php
@@ -38,7 +38,7 @@ class NotifyVisitToWebHooksTest extends TestCase
     private ObjectProphecy $em;
     private ObjectProphecy $logger;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->httpClient = $this->prophesize(ClientInterface::class);
         $this->em = $this->prophesize(EntityManagerInterface::class);
diff --git a/module/Core/test/EventDispatcher/PublishingUpdatesGeneratorTest.php b/module/Core/test/EventDispatcher/PublishingUpdatesGeneratorTest.php
index e4b616e8..5638b0fe 100644
--- a/module/Core/test/EventDispatcher/PublishingUpdatesGeneratorTest.php
+++ b/module/Core/test/EventDispatcher/PublishingUpdatesGeneratorTest.php
@@ -21,7 +21,7 @@ class PublishingUpdatesGeneratorTest extends TestCase
 {
     private PublishingUpdatesGenerator $generator;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->generator = new PublishingUpdatesGenerator(
             new ShortUrlDataTransformer(new ShortUrlStringifier([])),
diff --git a/module/Core/test/Service/ShortUrl/DeleteShortUrlServiceTest.php b/module/Core/test/Service/ShortUrl/DeleteShortUrlServiceTest.php
index cd4d6193..391d52fd 100644
--- a/module/Core/test/Service/ShortUrl/DeleteShortUrlServiceTest.php
+++ b/module/Core/test/Service/ShortUrl/DeleteShortUrlServiceTest.php
@@ -31,7 +31,7 @@ class DeleteShortUrlServiceTest extends TestCase
     private ObjectProphecy $urlResolver;
     private string $shortCode;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $shortUrl = ShortUrl::createEmpty()->setVisits(new ArrayCollection(
             map(range(0, 10), fn () => Visit::forValidShortUrl(ShortUrl::createEmpty(), Visitor::emptyInstance())),
diff --git a/module/Core/test/Service/ShortUrl/ShortUrlResolverTest.php b/module/Core/test/Service/ShortUrl/ShortUrlResolverTest.php
index bdccfa3f..d2c3bda5 100644
--- a/module/Core/test/Service/ShortUrl/ShortUrlResolverTest.php
+++ b/module/Core/test/Service/ShortUrl/ShortUrlResolverTest.php
@@ -32,7 +32,7 @@ class ShortUrlResolverTest extends TestCase
     private ShortUrlResolver $urlResolver;
     private ObjectProphecy $em;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManagerInterface::class);
         $this->urlResolver = new ShortUrlResolver($this->em->reveal());
diff --git a/module/Core/test/Service/ShortUrlServiceTest.php b/module/Core/test/Service/ShortUrlServiceTest.php
index 90000423..a042dd1f 100644
--- a/module/Core/test/Service/ShortUrlServiceTest.php
+++ b/module/Core/test/Service/ShortUrlServiceTest.php
@@ -34,7 +34,7 @@ class ShortUrlServiceTest extends TestCase
     private ObjectProphecy $urlResolver;
     private ObjectProphecy $titleResolutionHelper;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManagerInterface::class);
         $this->em->persist(Argument::any())->willReturn(null);
diff --git a/module/Core/test/Service/UrlShortenerTest.php b/module/Core/test/Service/UrlShortenerTest.php
index fbe9b1c4..86a057e5 100644
--- a/module/Core/test/Service/UrlShortenerTest.php
+++ b/module/Core/test/Service/UrlShortenerTest.php
@@ -30,7 +30,7 @@ class UrlShortenerTest extends TestCase
     private ObjectProphecy $shortCodeHelper;
     private ObjectProphecy $eventDispatcher;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->titleResolutionHelper = $this->prophesize(ShortUrlTitleResolutionHelperInterface::class);
         $this->titleResolutionHelper->processTitleAndValidateUrl(Argument::cetera())->willReturnArgument();
diff --git a/module/Core/test/ShortUrl/Paginator/Adapter/ShortUrlRepositoryAdapterTest.php b/module/Core/test/ShortUrl/Paginator/Adapter/ShortUrlRepositoryAdapterTest.php
index 2675b04a..2abc08c3 100644
--- a/module/Core/test/ShortUrl/Paginator/Adapter/ShortUrlRepositoryAdapterTest.php
+++ b/module/Core/test/ShortUrl/Paginator/Adapter/ShortUrlRepositoryAdapterTest.php
@@ -22,7 +22,7 @@ class ShortUrlRepositoryAdapterTest extends TestCase
 
     private ObjectProphecy $repo;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->repo = $this->prophesize(ShortUrlRepositoryInterface::class);
     }
diff --git a/module/Core/test/ShortUrl/Resolver/PersistenceShortUrlRelationResolverTest.php b/module/Core/test/ShortUrl/Resolver/PersistenceShortUrlRelationResolverTest.php
index 9aaf9495..39bb1b3f 100644
--- a/module/Core/test/ShortUrl/Resolver/PersistenceShortUrlRelationResolverTest.php
+++ b/module/Core/test/ShortUrl/Resolver/PersistenceShortUrlRelationResolverTest.php
@@ -25,7 +25,7 @@ class PersistenceShortUrlRelationResolverTest extends TestCase
     private PersistenceShortUrlRelationResolver $resolver;
     private ObjectProphecy $em;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManagerInterface::class);
         $this->em->getEventManager()->willReturn(new EventManager());
diff --git a/module/Core/test/ShortUrl/Resolver/SimpleShortUrlRelationResolverTest.php b/module/Core/test/ShortUrl/Resolver/SimpleShortUrlRelationResolverTest.php
index 483cb67a..669fdd6e 100644
--- a/module/Core/test/ShortUrl/Resolver/SimpleShortUrlRelationResolverTest.php
+++ b/module/Core/test/ShortUrl/Resolver/SimpleShortUrlRelationResolverTest.php
@@ -13,7 +13,7 @@ class SimpleShortUrlRelationResolverTest extends TestCase
 {
     private SimpleShortUrlRelationResolver $resolver;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->resolver = new SimpleShortUrlRelationResolver();
     }
diff --git a/module/Core/test/ShortUrl/Transformer/ShortUrlDataTransformerTest.php b/module/Core/test/ShortUrl/Transformer/ShortUrlDataTransformerTest.php
index 81c0d203..b48cd839 100644
--- a/module/Core/test/ShortUrl/Transformer/ShortUrlDataTransformerTest.php
+++ b/module/Core/test/ShortUrl/Transformer/ShortUrlDataTransformerTest.php
@@ -17,7 +17,7 @@ class ShortUrlDataTransformerTest extends TestCase
 {
     private ShortUrlDataTransformer $transformer;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->transformer = new ShortUrlDataTransformer(new ShortUrlStringifier([]));
     }
diff --git a/module/Core/test/Tag/TagServiceTest.php b/module/Core/test/Tag/TagServiceTest.php
index 8c301f0f..d3e1b841 100644
--- a/module/Core/test/Tag/TagServiceTest.php
+++ b/module/Core/test/Tag/TagServiceTest.php
@@ -33,7 +33,7 @@ class TagServiceTest extends TestCase
     private ObjectProphecy $em;
     private ObjectProphecy $repo;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManagerInterface::class);
         $this->repo = $this->prophesize(TagRepository::class);
diff --git a/module/Core/test/Util/UrlValidatorTest.php b/module/Core/test/Util/UrlValidatorTest.php
index 8aba6598..de5cad23 100644
--- a/module/Core/test/Util/UrlValidatorTest.php
+++ b/module/Core/test/Util/UrlValidatorTest.php
@@ -27,7 +27,7 @@ class UrlValidatorTest extends TestCase
     private ObjectProphecy $httpClient;
     private UrlShortenerOptions $options;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->httpClient = $this->prophesize(ClientInterface::class);
         $this->options = new UrlShortenerOptions(['validate_url' => true]);
diff --git a/module/Core/test/Visit/VisitLocatorTest.php b/module/Core/test/Visit/VisitLocatorTest.php
index 5c51b848..b740d143 100644
--- a/module/Core/test/Visit/VisitLocatorTest.php
+++ b/module/Core/test/Visit/VisitLocatorTest.php
@@ -38,7 +38,7 @@ class VisitLocatorTest extends TestCase
     private ObjectProphecy $em;
     private ObjectProphecy $repo;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManager::class);
         $this->repo = $this->prophesize(VisitRepositoryInterface::class);
diff --git a/module/Core/test/Visit/VisitsStatsHelperTest.php b/module/Core/test/Visit/VisitsStatsHelperTest.php
index 42c821bb..47288cb3 100644
--- a/module/Core/test/Visit/VisitsStatsHelperTest.php
+++ b/module/Core/test/Visit/VisitsStatsHelperTest.php
@@ -43,7 +43,7 @@ class VisitsStatsHelperTest extends TestCase
     private VisitsStatsHelper $helper;
     private ObjectProphecy $em;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManagerInterface::class);
         $this->helper = new VisitsStatsHelper($this->em->reveal());
diff --git a/module/Core/test/Visit/VisitsTrackerTest.php b/module/Core/test/Visit/VisitsTrackerTest.php
index 904f92d1..2bb13220 100644
--- a/module/Core/test/Visit/VisitsTrackerTest.php
+++ b/module/Core/test/Visit/VisitsTrackerTest.php
@@ -26,7 +26,7 @@ class VisitsTrackerTest extends TestCase
     private ObjectProphecy $eventDispatcher;
     private TrackingOptions $options;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManager::class);
 
diff --git a/module/Rest/config/entities-mappings/Shlinkio.Shlink.Rest.Entity.ApiKey.php b/module/Rest/config/entities-mappings/Shlinkio.Shlink.Rest.Entity.ApiKey.php
index 63716e74..1e0b041b 100644
--- a/module/Rest/config/entities-mappings/Shlinkio.Shlink.Rest.Entity.ApiKey.php
+++ b/module/Rest/config/entities-mappings/Shlinkio.Shlink.Rest.Entity.ApiKey.php
@@ -15,7 +15,8 @@ use function Shlinkio\Shlink\Core\determineTableName;
 return static function (ClassMetadata $metadata, array $emConfig): void {
     $builder = new ClassMetadataBuilder($metadata);
 
-    $builder->setTable(determineTableName('api_keys', $emConfig));
+    $builder->setTable(determineTableName('api_keys', $emConfig))
+            ->setCustomRepositoryClass(ApiKey\Repository\ApiKeyRepository::class);
 
     $builder->createField('id', Types::BIGINT)
             ->makePrimaryKey()
diff --git a/module/Rest/config/initial-api-key.config.php b/module/Rest/config/initial-api-key.config.php
new file mode 100644
index 00000000..a44f877f
--- /dev/null
+++ b/module/Rest/config/initial-api-key.config.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Rest;
+
+use Mezzio\Application;
+use Shlinkio\Shlink\Core\Config\EnvVars;
+
+use const PHP_SAPI;
+
+return [
+
+    // We will try to load the initial API key only for openswoole and RoadRunner.
+    // For php-fpm, the check against the database would happen on every request, resulting in a very bad performance.
+    'initial_api_key' => PHP_SAPI !== 'cli' ? null : EnvVars::INITIAL_API_KEY->loadFromEnv(),
+
+    'dependencies' => [
+        'delegators' => [
+            Application::class => [
+                ApiKey\InitialApiKeyDelegator::class,
+            ],
+        ],
+    ],
+
+];
diff --git a/module/Rest/src/ApiKey/InitialApiKeyDelegator.php b/module/Rest/src/ApiKey/InitialApiKeyDelegator.php
new file mode 100644
index 00000000..9129d7d3
--- /dev/null
+++ b/module/Rest/src/ApiKey/InitialApiKeyDelegator.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Rest\ApiKey;
+
+use Doctrine\ORM\EntityManager;
+use Mezzio\Application;
+use Psr\Container\ContainerInterface;
+use Shlinkio\Shlink\Rest\ApiKey\Repository\ApiKeyRepositoryInterface;
+use Shlinkio\Shlink\Rest\Entity\ApiKey;
+
+class InitialApiKeyDelegator
+{
+    public function __invoke(ContainerInterface $container, string $serviceName, callable $callback): Application
+    {
+        $initialApiKey = $container->get('config')['initial_api_key'] ?? null;
+        if ($initialApiKey !== null) {
+            $this->createInitialApiKey($initialApiKey, $container);
+        }
+
+        return $callback();
+    }
+
+    private function createInitialApiKey(string $initialApiKey, ContainerInterface $container): void
+    {
+        /** @var ApiKeyRepositoryInterface $repo */
+        $repo = $container->get(EntityManager::class)->getRepository(ApiKey::class);
+        $repo->createInitialApiKey($initialApiKey);
+    }
+}
diff --git a/module/Rest/src/ApiKey/Repository/ApiKeyRepository.php b/module/Rest/src/ApiKey/Repository/ApiKeyRepository.php
new file mode 100644
index 00000000..ec49145e
--- /dev/null
+++ b/module/Rest/src/ApiKey/Repository/ApiKeyRepository.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Rest\ApiKey\Repository;
+
+use Doctrine\DBAL\LockMode;
+use Happyr\DoctrineSpecification\Repository\EntitySpecificationRepository;
+use Shlinkio\Shlink\Rest\Entity\ApiKey;
+
+class ApiKeyRepository extends EntitySpecificationRepository implements ApiKeyRepositoryInterface
+{
+    public function createInitialApiKey(string $apiKey): void
+    {
+        $em = $this->getEntityManager();
+        $em->wrapInTransaction(function () use ($apiKey, $em): void {
+            // Ideally this would be a SELECT COUNT(...), but MsSQL and Postgres do not allow locking on aggregates
+            // Because of that we check if at least one result exists
+            $firstResult = $em->createQueryBuilder()->select('a.id')
+                                                    ->from(ApiKey::class, 'a')
+                                                    ->setMaxResults(1)
+                                                    ->getQuery()
+                                                    ->setLockMode(LockMode::PESSIMISTIC_WRITE)
+                                                    ->getOneOrNullResult();
+
+            if ($firstResult === null) {
+                $em->persist(ApiKey::fromKey($apiKey));
+                $em->flush();
+            }
+        });
+    }
+}
diff --git a/module/Rest/src/ApiKey/Repository/ApiKeyRepositoryInterface.php b/module/Rest/src/ApiKey/Repository/ApiKeyRepositoryInterface.php
new file mode 100644
index 00000000..f5beb3e9
--- /dev/null
+++ b/module/Rest/src/ApiKey/Repository/ApiKeyRepositoryInterface.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Rest\ApiKey\Repository;
+
+use Doctrine\Persistence\ObjectRepository;
+use Happyr\DoctrineSpecification\Repository\EntitySpecificationRepositoryInterface;
+
+interface ApiKeyRepositoryInterface extends ObjectRepository, EntitySpecificationRepositoryInterface
+{
+    /**
+     * Will create provided API key only if there's no API keys yet
+     */
+    public function createInitialApiKey(string $apiKey): void;
+}
diff --git a/module/Rest/src/Entity/ApiKey.php b/module/Rest/src/Entity/ApiKey.php
index 261baee4..bcb173da 100644
--- a/module/Rest/src/Entity/ApiKey.php
+++ b/module/Rest/src/Entity/ApiKey.php
@@ -23,16 +23,14 @@ class ApiKey extends AbstractEntity
     private bool $enabled;
     /** @var Collection|ApiKeyRole[] */
     private Collection $roles;
-    private ?string $name;
+    private ?string $name = null;
 
     /**
      * @throws Exception
      */
-    private function __construct(?string $name = null, ?Chronos $expirationDate = null)
+    private function __construct(?string $key = null)
     {
-        $this->key = Uuid::uuid4()->toString();
-        $this->expirationDate = $expirationDate;
-        $this->name = $name;
+        $this->key = $key ?? Uuid::uuid4()->toString();
         $this->enabled = true;
         $this->roles = new ArrayCollection();
     }
@@ -44,7 +42,10 @@ class ApiKey extends AbstractEntity
 
     public static function fromMeta(ApiKeyMeta $meta): self
     {
-        $apiKey = new self($meta->name, $meta->expirationDate);
+        $apiKey = self::create();
+        $apiKey->name = $meta->name;
+        $apiKey->expirationDate = $meta->expirationDate;
+
         foreach ($meta->roleDefinitions as $roleDefinition) {
             $apiKey->registerRole($roleDefinition);
         }
@@ -52,6 +53,11 @@ class ApiKey extends AbstractEntity
         return $apiKey;
     }
 
+    public static function fromKey(string $key): self
+    {
+        return new self($key);
+    }
+
     public function getExpirationDate(): ?Chronos
     {
         return $this->expirationDate;
diff --git a/module/Rest/test-db/ApiKey/Repository/ApiKeyRepositoryTest.php b/module/Rest/test-db/ApiKey/Repository/ApiKeyRepositoryTest.php
new file mode 100644
index 00000000..ae6ab0a0
--- /dev/null
+++ b/module/Rest/test-db/ApiKey/Repository/ApiKeyRepositoryTest.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ShlinkioDbTest\Shlink\Rest\ApiKey\Repository;
+
+use Shlinkio\Shlink\Rest\ApiKey\Repository\ApiKeyRepository;
+use Shlinkio\Shlink\Rest\Entity\ApiKey;
+use Shlinkio\Shlink\TestUtils\DbTest\DatabaseTestCase;
+
+class ApiKeyRepositoryTest extends DatabaseTestCase
+{
+    private ApiKeyRepository $repo;
+
+    protected function setUp(): void
+    {
+        $this->repo = $this->getEntityManager()->getRepository(ApiKey::class);
+    }
+
+    /** @test */
+    public function initialApiKeyIsCreatedOnlyOfNoApiKeysExistYet(): void
+    {
+        self::assertCount(0, $this->repo->findAll());
+        $this->repo->createInitialApiKey('initial_value');
+        self::assertCount(1, $this->repo->findAll());
+        self::assertCount(1, $this->repo->findBy(['key' => 'initial_value']));
+        $this->repo->createInitialApiKey('another_one');
+        self::assertCount(1, $this->repo->findAll());
+        self::assertCount(0, $this->repo->findBy(['key' => 'another_one']));
+    }
+}
diff --git a/module/Rest/test/Action/Domain/ListDomainsActionTest.php b/module/Rest/test/Action/Domain/ListDomainsActionTest.php
index bc852b34..a6903b46 100644
--- a/module/Rest/test/Action/Domain/ListDomainsActionTest.php
+++ b/module/Rest/test/Action/Domain/ListDomainsActionTest.php
@@ -25,7 +25,7 @@ class ListDomainsActionTest extends TestCase
     private ObjectProphecy $domainService;
     private NotFoundRedirectOptions $options;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->domainService = $this->prophesize(DomainServiceInterface::class);
         $this->options = new NotFoundRedirectOptions();
diff --git a/module/Rest/test/Action/HealthActionTest.php b/module/Rest/test/Action/HealthActionTest.php
index a233087a..8298b2d1 100644
--- a/module/Rest/test/Action/HealthActionTest.php
+++ b/module/Rest/test/Action/HealthActionTest.php
@@ -25,7 +25,7 @@ class HealthActionTest extends TestCase
     private HealthAction $action;
     private ObjectProphecy $conn;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->conn = $this->prophesize(Connection::class);
         $this->conn->executeQuery(Argument::cetera())->willReturn($this->prophesize(Result::class)->reveal());
diff --git a/module/Rest/test/Action/MercureInfoActionTest.php b/module/Rest/test/Action/MercureInfoActionTest.php
index 33083c79..e586a641 100644
--- a/module/Rest/test/Action/MercureInfoActionTest.php
+++ b/module/Rest/test/Action/MercureInfoActionTest.php
@@ -21,7 +21,7 @@ class MercureInfoActionTest extends TestCase
 
     private ObjectProphecy $provider;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->provider = $this->prophesize(JwtProviderInterface::class);
     }
diff --git a/module/Rest/test/Action/ShortUrl/CreateShortUrlActionTest.php b/module/Rest/test/Action/ShortUrl/CreateShortUrlActionTest.php
index 206b016f..eb0d8622 100644
--- a/module/Rest/test/Action/ShortUrl/CreateShortUrlActionTest.php
+++ b/module/Rest/test/Action/ShortUrl/CreateShortUrlActionTest.php
@@ -29,7 +29,7 @@ class CreateShortUrlActionTest extends TestCase
     private ObjectProphecy $urlShortener;
     private ObjectProphecy $transformer;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->urlShortener = $this->prophesize(UrlShortener::class);
         $this->transformer = $this->prophesize(DataTransformerInterface::class);
diff --git a/module/Rest/test/Action/ShortUrl/DeleteShortUrlActionTest.php b/module/Rest/test/Action/ShortUrl/DeleteShortUrlActionTest.php
index 9705cd59..ae49cf4b 100644
--- a/module/Rest/test/Action/ShortUrl/DeleteShortUrlActionTest.php
+++ b/module/Rest/test/Action/ShortUrl/DeleteShortUrlActionTest.php
@@ -20,7 +20,7 @@ class DeleteShortUrlActionTest extends TestCase
     private DeleteShortUrlAction $action;
     private ObjectProphecy $service;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->service = $this->prophesize(DeleteShortUrlServiceInterface::class);
         $this->action = new DeleteShortUrlAction($this->service->reveal());
diff --git a/module/Rest/test/Action/ShortUrl/EditShortUrlActionTest.php b/module/Rest/test/Action/ShortUrl/EditShortUrlActionTest.php
index e1f434df..4d09042d 100644
--- a/module/Rest/test/Action/ShortUrl/EditShortUrlActionTest.php
+++ b/module/Rest/test/Action/ShortUrl/EditShortUrlActionTest.php
@@ -24,7 +24,7 @@ class EditShortUrlActionTest extends TestCase
     private EditShortUrlAction $action;
     private ObjectProphecy $shortUrlService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->shortUrlService = $this->prophesize(ShortUrlServiceInterface::class);
         $this->action = new EditShortUrlAction($this->shortUrlService->reveal(), new ShortUrlDataTransformer(
diff --git a/module/Rest/test/Action/ShortUrl/ListShortUrlsActionTest.php b/module/Rest/test/Action/ShortUrl/ListShortUrlsActionTest.php
index 59876b55..8b295358 100644
--- a/module/Rest/test/Action/ShortUrl/ListShortUrlsActionTest.php
+++ b/module/Rest/test/Action/ShortUrl/ListShortUrlsActionTest.php
@@ -26,7 +26,7 @@ class ListShortUrlsActionTest extends TestCase
     private ListShortUrlsAction $action;
     private ObjectProphecy $service;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->service = $this->prophesize(ShortUrlService::class);
 
diff --git a/module/Rest/test/Action/ShortUrl/ResolveShortUrlActionTest.php b/module/Rest/test/Action/ShortUrl/ResolveShortUrlActionTest.php
index 19422d9d..78898f7a 100644
--- a/module/Rest/test/Action/ShortUrl/ResolveShortUrlActionTest.php
+++ b/module/Rest/test/Action/ShortUrl/ResolveShortUrlActionTest.php
@@ -23,7 +23,7 @@ class ResolveShortUrlActionTest extends TestCase
     private ResolveShortUrlAction $action;
     private ObjectProphecy $urlResolver;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->urlResolver = $this->prophesize(ShortUrlResolverInterface::class);
         $this->action = new ResolveShortUrlAction($this->urlResolver->reveal(), new ShortUrlDataTransformer(
diff --git a/module/Rest/test/Action/ShortUrl/SingleStepCreateShortUrlActionTest.php b/module/Rest/test/Action/ShortUrl/SingleStepCreateShortUrlActionTest.php
index e3fd3e10..f62a5da6 100644
--- a/module/Rest/test/Action/ShortUrl/SingleStepCreateShortUrlActionTest.php
+++ b/module/Rest/test/Action/ShortUrl/SingleStepCreateShortUrlActionTest.php
@@ -25,7 +25,7 @@ class SingleStepCreateShortUrlActionTest extends TestCase
     private ObjectProphecy $urlShortener;
     private ObjectProphecy $transformer;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->urlShortener = $this->prophesize(UrlShortenerInterface::class);
         $this->transformer = $this->prophesize(DataTransformerInterface::class);
diff --git a/module/Rest/test/Action/Tag/DeleteTagsActionTest.php b/module/Rest/test/Action/Tag/DeleteTagsActionTest.php
index 4812649d..457507e8 100644
--- a/module/Rest/test/Action/Tag/DeleteTagsActionTest.php
+++ b/module/Rest/test/Action/Tag/DeleteTagsActionTest.php
@@ -20,7 +20,7 @@ class DeleteTagsActionTest extends TestCase
     private DeleteTagsAction $action;
     private ObjectProphecy $tagService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->tagService = $this->prophesize(TagServiceInterface::class);
         $this->action = new DeleteTagsAction($this->tagService->reveal());
diff --git a/module/Rest/test/Action/Tag/ListTagsActionTest.php b/module/Rest/test/Action/Tag/ListTagsActionTest.php
index 123e4945..3da8594c 100644
--- a/module/Rest/test/Action/Tag/ListTagsActionTest.php
+++ b/module/Rest/test/Action/Tag/ListTagsActionTest.php
@@ -28,7 +28,7 @@ class ListTagsActionTest extends TestCase
     private ListTagsAction $action;
     private ObjectProphecy $tagService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->tagService = $this->prophesize(TagServiceInterface::class);
         $this->action = new ListTagsAction($this->tagService->reveal());
diff --git a/module/Rest/test/Action/Tag/TagsStatsActionTest.php b/module/Rest/test/Action/Tag/TagsStatsActionTest.php
index 2cb3ad64..44e6afb0 100644
--- a/module/Rest/test/Action/Tag/TagsStatsActionTest.php
+++ b/module/Rest/test/Action/Tag/TagsStatsActionTest.php
@@ -27,7 +27,7 @@ class TagsStatsActionTest extends TestCase
     private TagsStatsAction $action;
     private ObjectProphecy $tagService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->tagService = $this->prophesize(TagServiceInterface::class);
         $this->action = new TagsStatsAction($this->tagService->reveal());
diff --git a/module/Rest/test/Action/Tag/UpdateTagActionTest.php b/module/Rest/test/Action/Tag/UpdateTagActionTest.php
index d7b398db..a3bce658 100644
--- a/module/Rest/test/Action/Tag/UpdateTagActionTest.php
+++ b/module/Rest/test/Action/Tag/UpdateTagActionTest.php
@@ -24,7 +24,7 @@ class UpdateTagActionTest extends TestCase
     private UpdateTagAction $action;
     private ObjectProphecy $tagService;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->tagService = $this->prophesize(TagServiceInterface::class);
         $this->action = new UpdateTagAction($this->tagService->reveal());
diff --git a/module/Rest/test/Action/Visit/GlobalVisitsActionTest.php b/module/Rest/test/Action/Visit/GlobalVisitsActionTest.php
index 829b820b..d5f94250 100644
--- a/module/Rest/test/Action/Visit/GlobalVisitsActionTest.php
+++ b/module/Rest/test/Action/Visit/GlobalVisitsActionTest.php
@@ -21,7 +21,7 @@ class GlobalVisitsActionTest extends TestCase
     private GlobalVisitsAction $action;
     private ObjectProphecy $helper;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->helper = $this->prophesize(VisitsStatsHelperInterface::class);
         $this->action = new GlobalVisitsAction($this->helper->reveal());
diff --git a/module/Rest/test/Action/Visit/NonOrphanVisitsActionTest.php b/module/Rest/test/Action/Visit/NonOrphanVisitsActionTest.php
index 5b3487f0..60224bef 100644
--- a/module/Rest/test/Action/Visit/NonOrphanVisitsActionTest.php
+++ b/module/Rest/test/Action/Visit/NonOrphanVisitsActionTest.php
@@ -24,7 +24,7 @@ class NonOrphanVisitsActionTest extends TestCase
     private NonOrphanVisitsAction $action;
     private ObjectProphecy $visitsHelper;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->visitsHelper = $this->prophesize(VisitsStatsHelperInterface::class);
         $this->action = new NonOrphanVisitsAction($this->visitsHelper->reveal());
diff --git a/module/Rest/test/Action/Visit/ShortUrlVisitsActionTest.php b/module/Rest/test/Action/Visit/ShortUrlVisitsActionTest.php
index 299c42d1..d9f248e6 100644
--- a/module/Rest/test/Action/Visit/ShortUrlVisitsActionTest.php
+++ b/module/Rest/test/Action/Visit/ShortUrlVisitsActionTest.php
@@ -27,7 +27,7 @@ class ShortUrlVisitsActionTest extends TestCase
     private ShortUrlVisitsAction $action;
     private ObjectProphecy $visitsHelper;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->visitsHelper = $this->prophesize(VisitsStatsHelperInterface::class);
         $this->action = new ShortUrlVisitsAction($this->visitsHelper->reveal());
diff --git a/module/Rest/test/ApiKey/InitialApiKeyDelegatorTest.php b/module/Rest/test/ApiKey/InitialApiKeyDelegatorTest.php
new file mode 100644
index 00000000..7614fc9d
--- /dev/null
+++ b/module/Rest/test/ApiKey/InitialApiKeyDelegatorTest.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ShlinkioTest\Shlink\Rest\ApiKey;
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\EntityManagerInterface;
+use Mezzio\Application;
+use PHPUnit\Framework\TestCase;
+use Prophecy\Argument;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Prophecy\Prophecy\ObjectProphecy;
+use Psr\Container\ContainerInterface;
+use Shlinkio\Shlink\Rest\ApiKey\InitialApiKeyDelegator;
+use Shlinkio\Shlink\Rest\ApiKey\Repository\ApiKeyRepositoryInterface;
+use Shlinkio\Shlink\Rest\Entity\ApiKey;
+
+class InitialApiKeyDelegatorTest extends TestCase
+{
+    use ProphecyTrait;
+
+    private InitialApiKeyDelegator $delegator;
+    private ObjectProphecy $container;
+
+    protected function setUp(): void
+    {
+        $this->delegator = new InitialApiKeyDelegator();
+        $this->container = $this->prophesize(ContainerInterface::class);
+    }
+
+    /**
+     * @test
+     * @dataProvider provideConfigs
+     */
+    public function apiKeyIsInitializedWhenAppropriate(array $config, int $expectedCalls): void
+    {
+        $app = $this->prophesize(Application::class)->reveal();
+        $apiKeyRepo = $this->prophesize(ApiKeyRepositoryInterface::class);
+        $em = $this->prophesize(EntityManagerInterface::class);
+
+        $getConfig = $this->container->get('config')->willReturn($config);
+        $getRepo = $em->getRepository(ApiKey::class)->willReturn($apiKeyRepo->reveal());
+        $getEm = $this->container->get(EntityManager::class)->willReturn($em->reveal());
+
+        $result = ($this->delegator)($this->container->reveal(), '', fn () => $app);
+
+        self::assertSame($result, $app);
+        $getConfig->shouldHaveBeenCalledOnce();
+        $getRepo->shouldHaveBeenCalledTimes($expectedCalls);
+        $getEm->shouldHaveBeenCalledTimes($expectedCalls);
+        $apiKeyRepo->createInitialApiKey(Argument::any())->shouldHaveBeenCalledTimes($expectedCalls);
+    }
+
+    public function provideConfigs(): iterable
+    {
+        yield [[], 0];
+        yield [['initial_api_key' => null], 0];
+        yield [['initial_api_key' => 'the_initial_key'], 1];
+    }
+}
diff --git a/module/Rest/test/ConfigProviderTest.php b/module/Rest/test/ConfigProviderTest.php
index d3288151..1f7044f9 100644
--- a/module/Rest/test/ConfigProviderTest.php
+++ b/module/Rest/test/ConfigProviderTest.php
@@ -12,7 +12,7 @@ class ConfigProviderTest extends TestCase
 {
     private ConfigProvider $configProvider;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->configProvider = new ConfigProvider();
     }
@@ -22,10 +22,11 @@ class ConfigProviderTest extends TestCase
     {
         $config = ($this->configProvider)();
 
-        self::assertCount(4, $config);
+        self::assertCount(5, $config);
         self::assertArrayHasKey('dependencies', $config);
         self::assertArrayHasKey('auth', $config);
         self::assertArrayHasKey('entity_manager', $config);
+        self::assertArrayHasKey('initial_api_key', $config);
         self::assertArrayHasKey(ConfigAbstractFactory::class, $config);
     }
 
diff --git a/module/Rest/test/Middleware/AuthenticationMiddlewareTest.php b/module/Rest/test/Middleware/AuthenticationMiddlewareTest.php
index c915098a..eef78ab7 100644
--- a/module/Rest/test/Middleware/AuthenticationMiddlewareTest.php
+++ b/module/Rest/test/Middleware/AuthenticationMiddlewareTest.php
@@ -35,7 +35,7 @@ class AuthenticationMiddlewareTest extends TestCase
     private ObjectProphecy $apiKeyService;
     private ObjectProphecy $handler;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->apiKeyService = $this->prophesize(ApiKeyServiceInterface::class);
         $this->middleware = new AuthenticationMiddleware(
diff --git a/module/Rest/test/Middleware/BodyParserMiddlewareTest.php b/module/Rest/test/Middleware/BodyParserMiddlewareTest.php
index 04c9478d..f254197e 100644
--- a/module/Rest/test/Middleware/BodyParserMiddlewareTest.php
+++ b/module/Rest/test/Middleware/BodyParserMiddlewareTest.php
@@ -23,7 +23,7 @@ class BodyParserMiddlewareTest extends TestCase
 
     private BodyParserMiddleware $middleware;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->middleware = new BodyParserMiddleware();
     }
diff --git a/module/Rest/test/Middleware/CrossDomainMiddlewareTest.php b/module/Rest/test/Middleware/CrossDomainMiddlewareTest.php
index acdc9600..286652bf 100644
--- a/module/Rest/test/Middleware/CrossDomainMiddlewareTest.php
+++ b/module/Rest/test/Middleware/CrossDomainMiddlewareTest.php
@@ -20,7 +20,7 @@ class CrossDomainMiddlewareTest extends TestCase
     private CrossDomainMiddleware $middleware;
     private ObjectProphecy $handler;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->middleware = new CrossDomainMiddleware(['max_age' => 1000]);
         $this->handler = $this->prophesize(RequestHandlerInterface::class);
diff --git a/module/Rest/test/Middleware/EmptyResponseImplicitOptionsMiddlewareFactoryTest.php b/module/Rest/test/Middleware/EmptyResponseImplicitOptionsMiddlewareFactoryTest.php
index 4928f2ef..b2093461 100644
--- a/module/Rest/test/Middleware/EmptyResponseImplicitOptionsMiddlewareFactoryTest.php
+++ b/module/Rest/test/Middleware/EmptyResponseImplicitOptionsMiddlewareFactoryTest.php
@@ -15,7 +15,7 @@ class EmptyResponseImplicitOptionsMiddlewareFactoryTest extends TestCase
 {
     private EmptyResponseImplicitOptionsMiddlewareFactory $factory;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->factory = new EmptyResponseImplicitOptionsMiddlewareFactory();
     }
diff --git a/module/Rest/test/Middleware/ShortUrl/CreateShortUrlContentNegotiationMiddlewareTest.php b/module/Rest/test/Middleware/ShortUrl/CreateShortUrlContentNegotiationMiddlewareTest.php
index dc4733ff..b77d79a9 100644
--- a/module/Rest/test/Middleware/ShortUrl/CreateShortUrlContentNegotiationMiddlewareTest.php
+++ b/module/Rest/test/Middleware/ShortUrl/CreateShortUrlContentNegotiationMiddlewareTest.php
@@ -22,7 +22,7 @@ class CreateShortUrlContentNegotiationMiddlewareTest extends TestCase
     private CreateShortUrlContentNegotiationMiddleware $middleware;
     private ObjectProphecy $requestHandler;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->middleware = new CreateShortUrlContentNegotiationMiddleware();
         $this->requestHandler = $this->prophesize(RequestHandlerInterface::class);
diff --git a/module/Rest/test/Middleware/ShortUrl/DefaultShortCodesLengthMiddlewareTest.php b/module/Rest/test/Middleware/ShortUrl/DefaultShortCodesLengthMiddlewareTest.php
index e10e9f73..2aef77b7 100644
--- a/module/Rest/test/Middleware/ShortUrl/DefaultShortCodesLengthMiddlewareTest.php
+++ b/module/Rest/test/Middleware/ShortUrl/DefaultShortCodesLengthMiddlewareTest.php
@@ -23,7 +23,7 @@ class DefaultShortCodesLengthMiddlewareTest extends TestCase
     private DefaultShortCodesLengthMiddleware $middleware;
     private ObjectProphecy $handler;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->handler = $this->prophesize(RequestHandlerInterface::class);
         $this->middleware = new DefaultShortCodesLengthMiddleware(8);
diff --git a/module/Rest/test/Middleware/ShortUrl/DropDefaultDomainFromRequestMiddlewareTest.php b/module/Rest/test/Middleware/ShortUrl/DropDefaultDomainFromRequestMiddlewareTest.php
index 24f3aecd..9418a16a 100644
--- a/module/Rest/test/Middleware/ShortUrl/DropDefaultDomainFromRequestMiddlewareTest.php
+++ b/module/Rest/test/Middleware/ShortUrl/DropDefaultDomainFromRequestMiddlewareTest.php
@@ -22,7 +22,7 @@ class DropDefaultDomainFromRequestMiddlewareTest extends TestCase
     private DropDefaultDomainFromRequestMiddleware $middleware;
     private ObjectProphecy $next;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->next = $this->prophesize(RequestHandlerInterface::class);
         $this->middleware = new DropDefaultDomainFromRequestMiddleware('doma.in');
diff --git a/module/Rest/test/Service/ApiKeyServiceTest.php b/module/Rest/test/Service/ApiKeyServiceTest.php
index aba79036..f384a45a 100644
--- a/module/Rest/test/Service/ApiKeyServiceTest.php
+++ b/module/Rest/test/Service/ApiKeyServiceTest.php
@@ -25,7 +25,7 @@ class ApiKeyServiceTest extends TestCase
     private ApiKeyService $service;
     private ObjectProphecy $em;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->em = $this->prophesize(EntityManager::class);
         $this->service = new ApiKeyService($this->em->reveal());