diff --git a/API/Controllers/JobController.cs b/API/Controllers/JobController.cs
index 6b71294..85d994d 100644
--- a/API/Controllers/JobController.cs
+++ b/API/Controllers/JobController.cs
@@ -8,7 +8,6 @@ namespace API.Controllers;
 
 [ApiVersion(2)]
 [ApiController]
-[Produces("application/json")]
 [Route("v{version:apiVersion}/[controller]")]
 public class JobController(PgsqlContext context) : Controller
 {
@@ -17,7 +16,7 @@ public class JobController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet]
-    [ProducesResponseType<Job[]>(Status200OK)]
+    [ProducesResponseType<Job[]>(Status200OK, "application/json")]
     public IActionResult GetAllJobs()
     {
         Job[] ret = context.Jobs.ToArray();
@@ -30,7 +29,7 @@ public class JobController(PgsqlContext context) : Controller
     /// <param name="ids">Array of Job-IDs</param>
     /// <response code="200"></response>
     [HttpPost("WithIDs")]
-    [ProducesResponseType<Job[]>(Status200OK)]
+    [ProducesResponseType<Job[]>(Status200OK, "application/json")]
     public IActionResult GetJobs([FromBody]string[] ids)
     {
         Job[] ret = context.Jobs.Where(job => ids.Contains(job.JobId)).ToArray();
@@ -43,7 +42,7 @@ public class JobController(PgsqlContext context) : Controller
     /// <param name="state">Requested Job-State</param>
     /// <response code="200"></response>
     [HttpGet("State/{state}")]
-    [ProducesResponseType<Job[]>(Status200OK)]
+    [ProducesResponseType<Job[]>(Status200OK, "application/json")]
     public IActionResult GetJobsInState(JobState state)
     {
         Job[] jobsInState = context.Jobs.Where(job => job.state == state).ToArray();
@@ -56,7 +55,7 @@ public class JobController(PgsqlContext context) : Controller
     /// <param name="type">Requested Job-Type</param>
     /// <response code="200"></response>
     [HttpGet("Type/{type}")]
-    [ProducesResponseType<Job[]>(Status200OK)]
+    [ProducesResponseType<Job[]>(Status200OK, "application/json")]
     public IActionResult GetJobsOfType(JobType type)
     {
         Job[] jobsOfType = context.Jobs.Where(job => job.JobType == type).ToArray();
@@ -70,7 +69,7 @@ public class JobController(PgsqlContext context) : Controller
     /// <response code="200"></response>
     /// <response code="404">Job with ID could not be found</response>
     [HttpGet("{id}")]
-    [ProducesResponseType<Job>(Status200OK)]
+    [ProducesResponseType<Job>(Status200OK, "application/json")]
     [ProducesResponseType(Status404NotFound)]
     public IActionResult GetJob(string id)
     {
@@ -91,7 +90,7 @@ public class JobController(PgsqlContext context) : Controller
     /// <response code="500">Error during Database Operation</response>
     [HttpPut("NewDownloadChapterJob/{mangaId}")]
     [ProducesResponseType(Status201Created)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult CreateNewDownloadChapterJob(string mangaId, [FromBody]ulong recurrenceTime)
     {
         Job job = new DownloadNewChaptersJob(recurrenceTime, mangaId);
@@ -106,7 +105,7 @@ public class JobController(PgsqlContext context) : Controller
     /// <response code="500">Error during Database Operation</response>
     [HttpPut("DownloadSingleChapterJob/{chapterId}")]
     [ProducesResponseType(Status201Created)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult CreateNewDownloadChapterJob(string chapterId)
     {
         Job job = new DownloadSingleChapterJob(chapterId);
@@ -121,7 +120,7 @@ public class JobController(PgsqlContext context) : Controller
     /// <response code="500">Error during Database Operation</response>
     [HttpPut("UpdateMetadataJob/{mangaId}")]
     [ProducesResponseType(Status201Created)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult CreateUpdateMetadataJob(string mangaId)
     {
         Job job = new UpdateMetadataJob(0, mangaId);
@@ -135,7 +134,7 @@ public class JobController(PgsqlContext context) : Controller
     /// <response code="500">Error during Database Operation</response>
     [HttpPut("UpdateMetadataJob")]
     [ProducesResponseType(Status201Created)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult CreateUpdateAllMetadataJob()
     {
         List<string> ids = context.Manga.Select(m => m.MangaId).ToList();
@@ -174,9 +173,9 @@ public class JobController(PgsqlContext context) : Controller
     /// <response code="404">Job could not be found</response>
     /// <response code="500">Error during Database Operation</response>
     [HttpDelete("{id}")]
-    [ProducesResponseType<string[]>(Status200OK)]
+    [ProducesResponseType<string[]>(Status200OK, "application/json")]
     [ProducesResponseType(Status404NotFound)]
-    [ProducesResponseType(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult DeleteJob(string id)
     {
         try
@@ -216,10 +215,10 @@ public class JobController(PgsqlContext context) : Controller
     /// <response code="404">Job with ID not found</response>
     /// <response code="500">Error during Database Operation</response>
     [HttpPatch("{id}/")]
-    [ProducesResponseType<Job>(Status202Accepted)]
+    [ProducesResponseType<Job>(Status202Accepted, "application/json")]
     [ProducesResponseType(Status400BadRequest)]
     [ProducesResponseType(Status404NotFound)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult ModifyJob(string id, [FromBody]ModifyJobRecord modifyJobRecord)
     {
         try
@@ -252,7 +251,7 @@ public class JobController(PgsqlContext context) : Controller
     [ProducesResponseType(Status202Accepted)]
     [ProducesResponseType(Status404NotFound)]
     [ProducesResponseType(Status409Conflict)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult StartJob(string id)
     {
         Job? ret = context.Jobs.Find(id);
diff --git a/API/Controllers/LibraryConnectorController.cs b/API/Controllers/LibraryConnectorController.cs
index 1660e14..bf734d4 100644
--- a/API/Controllers/LibraryConnectorController.cs
+++ b/API/Controllers/LibraryConnectorController.cs
@@ -8,7 +8,6 @@ namespace API.Controllers;
 
 [ApiVersion(2)]
 [ApiController]
-[Produces("application/json")]
 [Route("v{v:apiVersion}/[controller]")]
 public class LibraryConnectorController(PgsqlContext context) : Controller
 {
@@ -17,7 +16,7 @@ public class LibraryConnectorController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet]
-    [ProducesResponseType<LibraryConnector[]>(Status200OK)]
+    [ProducesResponseType<LibraryConnector[]>(Status200OK, "application/json")]
     public IActionResult GetAllConnectors()
     {
         LibraryConnector[] connectors = context.LibraryConnectors.ToArray();
@@ -31,7 +30,7 @@ public class LibraryConnectorController(PgsqlContext context) : Controller
     /// <response code="200"></response>
     /// <response code="404">Connector with ID not found.</response>
     [HttpGet("{id}")]
-    [ProducesResponseType<LibraryConnector>(Status200OK)]
+    [ProducesResponseType<LibraryConnector>(Status200OK, "application/json")]
     [ProducesResponseType(Status404NotFound)]
     public IActionResult GetConnector(string id)
     {
@@ -47,11 +46,11 @@ public class LibraryConnectorController(PgsqlContext context) : Controller
     /// Creates a new Library-Connector
     /// </summary>
     /// <param name="libraryConnector">Library-Connector</param>
-    /// <response code="200"></response>
+    /// <response code="201"></response>
     /// <response code="500">Error during Database Operation</response>
     [HttpPut]
-    [ProducesResponseType(Status200OK)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType(Status201Created)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult CreateConnector([FromBody]LibraryConnector libraryConnector)
     {
         try
@@ -76,20 +75,18 @@ public class LibraryConnectorController(PgsqlContext context) : Controller
     [HttpDelete("{id}")]
     [ProducesResponseType(Status200OK)]
     [ProducesResponseType(Status404NotFound)]
-    [ProducesResponseType(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult DeleteConnector(string id)
     {
         try
         {
             LibraryConnector? ret = context.LibraryConnectors.Find(id);
-            switch (ret is not null)
-            {
-                case true:
-                    context.Remove(ret);
-                    context.SaveChanges();
-                    return Ok();
-                case false: return NotFound();
-            }
+            if (ret is null)
+                return NotFound();
+            
+            context.Remove(ret);
+            context.SaveChanges();
+            return Ok();
         }
         catch (Exception e)
         {
diff --git a/API/Controllers/MangaConnectorController.cs b/API/Controllers/MangaConnectorController.cs
index eae6123..ac297ec 100644
--- a/API/Controllers/MangaConnectorController.cs
+++ b/API/Controllers/MangaConnectorController.cs
@@ -8,7 +8,6 @@ namespace API.Controllers;
 
 [ApiVersion(2)]
 [ApiController]
-[Produces("application/json")]
 [Route("v{v:apiVersion}")]
 public class MangaConnectorController(PgsqlContext context) : Controller
 {
@@ -17,7 +16,7 @@ public class MangaConnectorController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet]
-    [ProducesResponseType<MangaConnector[]>(Status200OK)]
+    [ProducesResponseType<MangaConnector[]>(Status200OK, "application/json")]
     public IActionResult GetConnectors()
     {
         MangaConnector[] connectors = context.MangaConnectors.ToArray();
@@ -29,7 +28,7 @@ public class MangaConnectorController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet("enabled")]
-    [ProducesResponseType<MangaConnector[]>(Status200OK)]
+    [ProducesResponseType<MangaConnector[]>(Status200OK, "application/json")]
     public IActionResult GetEnabledConnectors()
     {
         MangaConnector[] connectors = context.MangaConnectors.Where(c => c.Enabled == true).ToArray();
@@ -41,7 +40,7 @@ public class MangaConnectorController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet("disabled")]
-    [ProducesResponseType<MangaConnector[]>(Status200OK)]
+    [ProducesResponseType<MangaConnector[]>(Status200OK, "application/json")]
     public IActionResult GetDisabledConnectors()
     {
         MangaConnector[] connectors = context.MangaConnectors.Where(c => c.Enabled == false).ToArray();
@@ -55,9 +54,11 @@ public class MangaConnectorController(PgsqlContext context) : Controller
     /// <param name="enabled">Set true to enable</param>
     /// <response code="200"></response>
     /// <response code="404">Connector with ID not found.</response>
+    /// <response code="500">Error during Database Operation</response>
     [HttpPatch("{id}/SetEnabled/{enabled}")]
     [ProducesResponseType(Status200OK)]
     [ProducesResponseType(Status404NotFound)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult SetEnabled(string id, bool enabled)
     {
         try
diff --git a/API/Controllers/MangaController.cs b/API/Controllers/MangaController.cs
index 9f838c5..d1cf9ba 100644
--- a/API/Controllers/MangaController.cs
+++ b/API/Controllers/MangaController.cs
@@ -12,7 +12,6 @@ namespace API.Controllers;
 
 [ApiVersion(2)]
 [ApiController]
-[Produces("application/json")]
 [Route("v{v:apiVersion}/[controller]")]
 public class MangaController(PgsqlContext context) : Controller
 {
@@ -21,7 +20,7 @@ public class MangaController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet]
-    [ProducesResponseType<Manga[]>(Status200OK)]
+    [ProducesResponseType<Manga[]>(Status200OK, "application/json")]
     public IActionResult GetAllManga()
     {
         Manga[] ret = context.Manga.ToArray();
@@ -34,7 +33,7 @@ public class MangaController(PgsqlContext context) : Controller
     /// <param name="ids">Array of Manga-IDs</param>
     /// <response code="200"></response>
     [HttpPost("WithIDs")]
-    [ProducesResponseType<Manga[]>(Status200OK)]
+    [ProducesResponseType<Manga[]>(Status200OK, "application/json")]
     public IActionResult GetManga([FromBody]string[] ids)
     {
         Manga[] ret = context.Manga.Where(m => ids.Contains(m.MangaId)).ToArray();
@@ -48,7 +47,7 @@ public class MangaController(PgsqlContext context) : Controller
     /// <response code="200"></response>
     /// <response code="404">Manga with ID not found</response>
     [HttpGet("{id}")]
-    [ProducesResponseType<Manga>(Status200OK)]
+    [ProducesResponseType<Manga>(Status200OK, "application/json")]
     [ProducesResponseType(Status404NotFound)]
     public IActionResult GetManga(string id)
     {
@@ -68,7 +67,7 @@ public class MangaController(PgsqlContext context) : Controller
     [HttpDelete("{id}")]
     [ProducesResponseType(Status200OK)]
     [ProducesResponseType(Status404NotFound)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult DeleteManga(string id)
     {
         try
@@ -97,8 +96,7 @@ public class MangaController(PgsqlContext context) : Controller
     /// <response code="400">The formatting-request was invalid</response>
     /// <response code="404">Manga with ID not found</response>
     [HttpPost("{id}/Cover")]
-    [Produces("image/jpeg")]
-    [ProducesResponseType(Status200OK)]
+    [ProducesResponseType<byte[]>(Status200OK,"image/jpeg")]
     [ProducesResponseType(Status204NoContent)]
     [ProducesResponseType(Status400BadRequest)]
     [ProducesResponseType(Status404NotFound)]
@@ -135,7 +133,7 @@ public class MangaController(PgsqlContext context) : Controller
     /// <response code="200"></response>
     /// <response code="404">Manga with ID not found</response>
     [HttpGet("{id}/Chapters")]
-    [ProducesResponseType<Chapter[]>(Status200OK)]
+    [ProducesResponseType<Chapter[]>(Status200OK, "application/json")]
     [ProducesResponseType(Status404NotFound)]
     public IActionResult GetChapters(string id)
     {
@@ -156,10 +154,10 @@ public class MangaController(PgsqlContext context) : Controller
     /// <response code="404">Manga with ID not found.</response>
     /// <response code="500">Could not retrieve the maximum chapter-number</response>
     [HttpGet("{id}/Chapter/Latest")]
-    [ProducesResponseType<Chapter>(Status200OK)]
+    [ProducesResponseType<Chapter>(Status200OK, "application/json")]
     [ProducesResponseType(Status204NoContent)]
     [ProducesResponseType(Status404NotFound)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult GetLatestChapter(string id)
     {
         Manga? m = context.Manga.Find(id);
@@ -184,7 +182,7 @@ public class MangaController(PgsqlContext context) : Controller
     /// <response code="200"></response>
     /// <response code="404">Manga with ID not found.</response>
     [HttpPatch("{id}/IgnoreChaptersBefore")]
-    [ProducesResponseType<float>(Status200OK)]
+    [ProducesResponseType<float>(Status200OK, "text/plain")]
     [ProducesResponseType(Status404NotFound)]
     public IActionResult IgnoreChaptersBefore(string id)
     {
diff --git a/API/Controllers/NotificationConnectorController.cs b/API/Controllers/NotificationConnectorController.cs
index 58381d4..f6c7ca7 100644
--- a/API/Controllers/NotificationConnectorController.cs
+++ b/API/Controllers/NotificationConnectorController.cs
@@ -17,7 +17,7 @@ public class NotificationConnectorController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet]
-    [ProducesResponseType<NotificationConnector[]>(Status200OK)]
+    [ProducesResponseType<NotificationConnector[]>(Status200OK, "application/json")]
     public IActionResult GetAllConnectors()
     {
         NotificationConnector[] ret = context.NotificationConnectors.ToArray();
@@ -31,7 +31,7 @@ public class NotificationConnectorController(PgsqlContext context) : Controller
     /// <response code="200"></response>
     /// <response code="404">NotificationConnector with ID not found</response>
     [HttpGet("{id}")]
-    [ProducesResponseType<NotificationConnector>(Status200OK)]
+    [ProducesResponseType<NotificationConnector>(Status200OK, "application/json")]
     [ProducesResponseType(Status404NotFound)]
     public IActionResult GetConnector(string id)
     {
@@ -50,8 +50,8 @@ public class NotificationConnectorController(PgsqlContext context) : Controller
     /// <response code="201"></response>
     /// <response code="500">Error during Database Operation</response>
     [HttpPut]
-    [ProducesResponseType<NotificationConnector[]>(Status200OK)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<NotificationConnector[]>(Status200OK, "application/json")]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult CreateConnector([FromBody]NotificationConnector notificationConnector)
     {
         try
@@ -76,7 +76,7 @@ public class NotificationConnectorController(PgsqlContext context) : Controller
     [HttpDelete("{id}")]
     [ProducesResponseType(Status200OK)]
     [ProducesResponseType(Status404NotFound)]
-    [ProducesResponseType(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult DeleteConnector(string id)
     {
         try
diff --git a/API/Controllers/SearchController.cs b/API/Controllers/SearchController.cs
index e35e67c..a4a3920 100644
--- a/API/Controllers/SearchController.cs
+++ b/API/Controllers/SearchController.cs
@@ -10,7 +10,6 @@ namespace API.Controllers;
 
 [ApiVersion(2)]
 [ApiController]
-[Produces("application/json")]
 [Route("v{v:apiVersion}/[controller]")]
 public class SearchController(PgsqlContext context) : Controller
 {
@@ -22,8 +21,8 @@ public class SearchController(PgsqlContext context) : Controller
     /// <response code="200"></response>
     /// <response code="500">Error during Database Operation</response>
     [HttpPost("{name}")]
-    [ProducesResponseType<Manga[]>(Status200OK)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<Manga[]>(Status200OK, "application/json")]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult SearchMangaGlobal(string name)
     {
         List<(Manga, List<Author>?, List<MangaTag>?, List<Link>?, List<MangaAltTitle>?)> allManga = new();
@@ -57,10 +56,10 @@ public class SearchController(PgsqlContext context) : Controller
     /// <response code="406">MangaConnector with ID is disabled</response>
     /// <response code="500">Error during Database Operation</response>
     [HttpPost("{id}/{name}")]
-    [ProducesResponseType<Manga[]>(Status200OK)]
+    [ProducesResponseType<Manga[]>(Status200OK, "application/json")]
     [ProducesResponseType(Status404NotFound)]
     [ProducesResponseType(Status406NotAcceptable)]
-    [ProducesResponseType<string>(Status500InternalServerError)]
+    [ProducesResponseType<string>(Status500InternalServerError, "text/plain")]
     public IActionResult SearchManga(string id, string name)
     {
         MangaConnector? connector = context.MangaConnectors.Find(id);
diff --git a/API/Controllers/SettingsController.cs b/API/Controllers/SettingsController.cs
index 2906fcb..afb512b 100644
--- a/API/Controllers/SettingsController.cs
+++ b/API/Controllers/SettingsController.cs
@@ -9,7 +9,6 @@ namespace API.Controllers;
 
 [ApiVersion(2)]
 [ApiController]
-[Produces("application/json")]
 [Route("v{v:apiVersion}/[controller]")]
 public class SettingsController(PgsqlContext context) : Controller
 {
@@ -18,7 +17,7 @@ public class SettingsController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet]
-    [ProducesResponseType<JsonObject>(StatusCodes.Status200OK)]
+    [ProducesResponseType<string>(StatusCodes.Status200OK, "application/json")]
     public IActionResult GetSettings()
     {
         return Ok(TrangaSettings.Serialize());
@@ -29,7 +28,7 @@ public class SettingsController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet("UserAgent")]
-    [ProducesResponseType<string>(Status200OK)]
+    [ProducesResponseType<string>(Status200OK, "text/plain")]
     public IActionResult GetUserAgent()
     {
         return Ok(TrangaSettings.userAgent);
@@ -64,7 +63,7 @@ public class SettingsController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200"></response>
     [HttpGet("RequestLimits")]
-    [ProducesResponseType<Dictionary<RequestType,int>>(Status200OK)]
+    [ProducesResponseType<Dictionary<RequestType,int>>(Status200OK, "application/json")]
     public IActionResult GetRequestLimits()
     {
         return Ok(TrangaSettings.requestLimits);
@@ -97,7 +96,7 @@ public class SettingsController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200">JPEG compression-level as Integer</response>
     [HttpGet("ImageCompression")]
-    [ProducesResponseType<int>(Status200OK)]
+    [ProducesResponseType<int>(Status200OK, "text/plain")]
     public IActionResult GetImageCompression()
     {
         return Ok(TrangaSettings.compression);
@@ -125,7 +124,7 @@ public class SettingsController(PgsqlContext context) : Controller
     /// </summary>
     /// <response code="200">True if enabled</response>
     [HttpGet("BWImages")]
-    [ProducesResponseType<bool>(Status200OK)]
+    [ProducesResponseType<bool>(Status200OK, "text/plain")]
     public IActionResult GetBwImagesToggle()
     {
         return Ok(TrangaSettings.bwImages);
@@ -150,7 +149,7 @@ public class SettingsController(PgsqlContext context) : Controller
     /// <remarks>April Fools Mode disables all downloads on April 1st</remarks>
     /// <response code="200">True if enabled</response>
     [HttpGet("AprilFoolsMode")]
-    [ProducesResponseType<bool>(Status200OK)]
+    [ProducesResponseType<bool>(Status200OK, "text/plain")]
     public IActionResult GetAprilFoolsMode()
     {
         return Ok(TrangaSettings.aprilFoolsMode);