diff --git a/src/NzbDrone.Core/ImportLists/FetchAndParseImportListService.cs b/src/NzbDrone.Core/ImportLists/FetchAndParseImportListService.cs
index 3dca6c66a..9a7804e72 100644
--- a/src/NzbDrone.Core/ImportLists/FetchAndParseImportListService.cs
+++ b/src/NzbDrone.Core/ImportLists/FetchAndParseImportListService.cs
@@ -49,7 +49,7 @@ namespace NzbDrone.Core.ImportLists
                 var importListLocal = importList;
                 var importListStatus = _importListStatusService.GetLastSyncListInfo(importListLocal.Definition.Id);
 
-                if (DateTime.UtcNow < (importListStatus + importListLocal.MinRefreshInterval))
+                if (importListStatus.HasValue && DateTime.UtcNow < (importListStatus + importListLocal.MinRefreshInterval))
                 {
                     _logger.Trace("Skipping refresh of Import List {0} due to minimum refresh inverval", importListLocal.Definition.Name);
                     continue;
diff --git a/src/NzbDrone.Core/ImportLists/ImportListStatus.cs b/src/NzbDrone.Core/ImportLists/ImportListStatus.cs
index 69892e1b5..90efc387b 100644
--- a/src/NzbDrone.Core/ImportLists/ImportListStatus.cs
+++ b/src/NzbDrone.Core/ImportLists/ImportListStatus.cs
@@ -6,6 +6,6 @@ namespace NzbDrone.Core.ImportLists
 {
     public class ImportListStatus : ProviderStatusBase
     {
-        public DateTime LastInfoSync { get; set; }
+        public DateTime? LastInfoSync { get; set; }
     }
 }
diff --git a/src/NzbDrone.Core/ImportLists/ImportListStatusService.cs b/src/NzbDrone.Core/ImportLists/ImportListStatusService.cs
index e543d0a7e..bbef4b179 100644
--- a/src/NzbDrone.Core/ImportLists/ImportListStatusService.cs
+++ b/src/NzbDrone.Core/ImportLists/ImportListStatusService.cs
@@ -8,7 +8,7 @@ namespace NzbDrone.Core.ImportLists
 {
     public interface IImportListStatusService : IProviderStatusServiceBase<ImportListStatus>
     {
-        DateTime GetLastSyncListInfo(int importListId);
+        DateTime? GetLastSyncListInfo(int importListId);
 
         void UpdateListSyncStatus(int importListId);
     }
@@ -20,7 +20,7 @@ namespace NzbDrone.Core.ImportLists
         {
         }
 
-        public DateTime GetLastSyncListInfo(int importListId)
+        public DateTime? GetLastSyncListInfo(int importListId)
         {
             return GetProviderStatus(importListId).LastInfoSync;
         }
diff --git a/src/NzbDrone.Core/ImportLists/ImportListType.cs b/src/NzbDrone.Core/ImportLists/ImportListType.cs
index 179db800c..de5d188b6 100644
--- a/src/NzbDrone.Core/ImportLists/ImportListType.cs
+++ b/src/NzbDrone.Core/ImportLists/ImportListType.cs
@@ -5,6 +5,7 @@ namespace NzbDrone.Core.ImportLists
         Program,
         Plex,
         Trakt,
+        Simkl,
         Other,
         Advanced
     }
diff --git a/src/NzbDrone.Core/ImportLists/Simkl/SimklAPI.cs b/src/NzbDrone.Core/ImportLists/Simkl/SimklAPI.cs
new file mode 100644
index 000000000..4472af249
--- /dev/null
+++ b/src/NzbDrone.Core/ImportLists/Simkl/SimklAPI.cs
@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace NzbDrone.Core.ImportLists.Simkl
+{
+    public class SimklSeriesIdsResource
+    {
+        public int Simkl { get; set; }
+        public string Slug { get; set; }
+        public string Imdb { get; set; }
+        public string Tmdb { get; set; }
+        public string Tvdb { get; set; }
+    }
+
+    public class SimklSeriesPropsResource
+    {
+        public string Title { get; set; }
+        public int? Year { get; set; }
+        public SimklSeriesIdsResource Ids { get; set; }
+    }
+
+    public class SimklSeriesResource
+    {
+        public SimklSeriesPropsResource Show { get; set; }
+    }
+
+    public class SimklResponse
+    {
+        public List<SimklSeriesResource> Shows { get; set; }
+    }
+
+    public class RefreshRequestResponse
+    {
+        [JsonProperty("access_token")]
+        public string AccessToken { get; set; }
+        [JsonProperty("expires_in")]
+        public int ExpiresIn { get; set; }
+        [JsonProperty("refresh_token")]
+        public string RefreshToken { get; set; }
+    }
+
+    public class UserSettingsResponse
+    {
+        public SimklUserResource User { get; set; }
+        public SimklUserAccountResource Account { get; set; }
+    }
+
+    public class SimklUserResource
+    {
+        public string Name { get; set; }
+    }
+
+    public class SimklUserAccountResource
+    {
+        public int Id { get; set; }
+    }
+
+    public class SimklSyncActivityResource
+    {
+        [JsonProperty("tv_shows")]
+        public SimklTvSyncActivityResource TvShows { get; set; }
+    }
+
+    public class SimklTvSyncActivityResource
+    {
+        public DateTime All { get; set; }
+    }
+}
diff --git a/src/NzbDrone.Core/ImportLists/Simkl/SimklImportBase.cs b/src/NzbDrone.Core/ImportLists/Simkl/SimklImportBase.cs
new file mode 100644
index 000000000..f6daf9e5f
--- /dev/null
+++ b/src/NzbDrone.Core/ImportLists/Simkl/SimklImportBase.cs
@@ -0,0 +1,183 @@
+using System;
+using System.Collections.Generic;
+using NLog;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Common.Http;
+using NzbDrone.Core.Configuration;
+using NzbDrone.Core.Parser;
+using NzbDrone.Core.Parser.Model;
+using NzbDrone.Core.Validation;
+
+namespace NzbDrone.Core.ImportLists.Simkl
+{
+    public abstract class SimklImportBase<TSettings> : HttpImportListBase<TSettings>
+    where TSettings : SimklSettingsBase<TSettings>, new()
+    {
+        public override ImportListType ListType => ImportListType.Simkl;
+        public override TimeSpan MinRefreshInterval => TimeSpan.FromHours(6);
+
+        public const string OAuthUrl = "https://simkl.com/oauth/authorize";
+        public const string RedirectUri = "https://auth.servarr.com/v1/simkl_sonarr/auth";
+        public const string RenewUri = "https://auth.servarr.com/v1/simkl_sonarr/renew";
+        public const string ClientId = "3281c139f576b2f59c1389b22337140b6b087ee17e000e89dbafdcf20af6dac7";
+
+        private IImportListRepository _importListRepository;
+
+        protected SimklImportBase(IImportListRepository netImportRepository,
+                           IHttpClient httpClient,
+                           IImportListStatusService importListStatusService,
+                           IConfigService configService,
+                           IParsingService parsingService,
+                           Logger logger)
+            : base(httpClient, importListStatusService, configService, parsingService, logger)
+        {
+            _importListRepository = netImportRepository;
+        }
+
+        public override IList<ImportListItemInfo> Fetch()
+        {
+            Settings.Validate().Filter("AccessToken", "RefreshToken").ThrowOnError();
+            _logger.Trace($"Access token expires at {Settings.Expires}");
+
+            // Simkl doesn't currently expire access tokens, but if they start lets be prepared
+            if (Settings.RefreshToken.IsNotNullOrWhiteSpace() && Settings.Expires < DateTime.UtcNow.AddMinutes(5))
+            {
+                RefreshToken();
+            }
+
+            var lastFetch = _importListStatusService.GetLastSyncListInfo(Definition.Id);
+            var lastActivity = GetLastActivity();
+
+            // Check to see if user has any activity since last sync, if not return empty to avoid work
+            if (lastFetch.HasValue && lastActivity < lastFetch.Value.AddHours(-2))
+            {
+                return new List<ImportListItemInfo>();
+            }
+
+            var generator = GetRequestGenerator();
+
+            return FetchItems(g => g.GetListItems(), true);
+        }
+
+        public override IParseImportListResponse GetParser()
+        {
+            return new SimklParser();
+        }
+
+        public override object RequestAction(string action, IDictionary<string, string> query)
+        {
+            if (action == "startOAuth")
+            {
+                var request = new HttpRequestBuilder(OAuthUrl)
+                    .AddQueryParam("client_id", ClientId)
+                    .AddQueryParam("response_type", "code")
+                    .AddQueryParam("redirect_uri", RedirectUri)
+                    .AddQueryParam("state", query["callbackUrl"])
+                    .Build();
+
+                return new
+                {
+                    OauthUrl = request.Url.ToString()
+                };
+            }
+            else if (action == "getOAuthToken")
+            {
+                return new
+                {
+                    accessToken = query["access_token"],
+                    expires = DateTime.UtcNow.AddSeconds(int.Parse(query["expires_in"])),
+                    refreshToken = query["refresh_token"],
+                    authUser = GetUserId(query["access_token"])
+                };
+            }
+
+            return new { };
+        }
+
+        private DateTime GetLastActivity()
+        {
+            var request = new HttpRequestBuilder(string.Format("{0}/sync/activities", Settings.BaseUrl)).Build();
+
+            request.Headers.Add("simkl-api-key", ClientId);
+            request.Headers.Add("Authorization", "Bearer " + Settings.AccessToken);
+
+            try
+            {
+                var response = _httpClient.Get<SimklSyncActivityResource>(request);
+
+                if (response?.Resource != null)
+                {
+                    return response.Resource.TvShows.All;
+                }
+            }
+            catch (HttpException)
+            {
+                _logger.Warn($"Error fetching user activity");
+            }
+
+            return DateTime.UtcNow;
+        }
+
+        private string GetUserId(string accessToken)
+        {
+            var request = new HttpRequestBuilder(string.Format("{0}/users/settings", Settings.BaseUrl))
+                .Build();
+
+            request.Headers.Add("simkl-api-key", ClientId);
+
+            if (accessToken.IsNotNullOrWhiteSpace())
+            {
+                request.Headers.Add("Authorization", "Bearer " + accessToken);
+            }
+
+            try
+            {
+                var response = _httpClient.Get<UserSettingsResponse>(request);
+
+                if (response?.Resource != null)
+                {
+                    return response.Resource.Account.Id.ToString();
+                }
+            }
+            catch (HttpException)
+            {
+                _logger.Warn($"Error refreshing simkl access token");
+            }
+
+            return null;
+        }
+
+        private void RefreshToken()
+        {
+            _logger.Trace("Refreshing Token");
+
+            Settings.Validate().Filter("RefreshToken").ThrowOnError();
+
+            var request = new HttpRequestBuilder(RenewUri)
+                .AddQueryParam("refresh_token", Settings.RefreshToken)
+                .Build();
+
+            try
+            {
+                var response = _httpClient.Get<RefreshRequestResponse>(request);
+
+                if (response?.Resource != null)
+                {
+                    var token = response.Resource;
+                    Settings.AccessToken = token.AccessToken;
+                    Settings.Expires = DateTime.UtcNow.AddSeconds(token.ExpiresIn);
+                    Settings.RefreshToken = token.RefreshToken ?? Settings.RefreshToken;
+
+                    if (Definition.Id > 0)
+                    {
+                        _importListRepository.UpdateSettings((ImportListDefinition)Definition);
+                    }
+                }
+            }
+            catch (HttpException)
+            {
+                _logger.Warn($"Error refreshing simkl access token");
+            }
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/ImportLists/Simkl/SimklParser.cs b/src/NzbDrone.Core/ImportLists/Simkl/SimklParser.cs
new file mode 100644
index 000000000..53d72809c
--- /dev/null
+++ b/src/NzbDrone.Core/ImportLists/Simkl/SimklParser.cs
@@ -0,0 +1,66 @@
+using System.Collections.Generic;
+using System.Net;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Common.Serializer;
+using NzbDrone.Core.ImportLists.Exceptions;
+using NzbDrone.Core.Parser.Model;
+
+namespace NzbDrone.Core.ImportLists.Simkl
+{
+    public class SimklParser : IParseImportListResponse
+    {
+        private ImportListResponse _importResponse;
+
+        public SimklParser()
+        {
+        }
+
+        public virtual IList<ImportListItemInfo> ParseResponse(ImportListResponse importResponse)
+        {
+            _importResponse = importResponse;
+
+            var series = new List<ImportListItemInfo>();
+
+            if (!PreProcess(_importResponse))
+            {
+                return series;
+            }
+
+            var jsonResponse = STJson.Deserialize<SimklResponse>(_importResponse.Content);
+
+            // no shows were return
+            if (jsonResponse == null)
+            {
+                return series;
+            }
+
+            foreach (var show in jsonResponse.Shows)
+            {
+                series.AddIfNotNull(new ImportListItemInfo()
+                {
+                    Title = show.Show.Title,
+                    TvdbId = int.TryParse(show.Show.Ids.Tvdb, out var tvdbId) ? tvdbId : 0,
+                    ImdbId = show.Show.Ids.Imdb
+                });
+            }
+
+            return series;
+        }
+
+        protected virtual bool PreProcess(ImportListResponse netImportResponse)
+        {
+            if (netImportResponse.HttpResponse.StatusCode != HttpStatusCode.OK)
+            {
+                throw new ImportListException(netImportResponse, "Simkl API call resulted in an unexpected StatusCode [{0}]", netImportResponse.HttpResponse.StatusCode);
+            }
+
+            if (netImportResponse.HttpResponse.Headers.ContentType != null && netImportResponse.HttpResponse.Headers.ContentType.Contains("text/json") &&
+                netImportResponse.HttpRequest.Headers.Accept != null && !netImportResponse.HttpRequest.Headers.Accept.Contains("text/json"))
+            {
+                throw new ImportListException(netImportResponse, "Simkl API responded with html content. Site is likely blocked or unavailable.");
+            }
+
+            return true;
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/ImportLists/Simkl/SimklSettingsBase.cs b/src/NzbDrone.Core/ImportLists/Simkl/SimklSettingsBase.cs
new file mode 100644
index 000000000..f77de5665
--- /dev/null
+++ b/src/NzbDrone.Core/ImportLists/Simkl/SimklSettingsBase.cs
@@ -0,0 +1,60 @@
+using System;
+using FluentValidation;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Annotations;
+using NzbDrone.Core.Validation;
+
+namespace NzbDrone.Core.ImportLists.Simkl
+{
+    public class SimklSettingsBaseValidator<TSettings> : AbstractValidator<TSettings>
+    where TSettings : SimklSettingsBase<TSettings>
+    {
+        public SimklSettingsBaseValidator()
+        {
+            RuleFor(c => c.BaseUrl).ValidRootUrl();
+
+            RuleFor(c => c.AccessToken).NotEmpty()
+                                       .OverridePropertyName("SignIn")
+                                       .WithMessage("Must authenticate with Simkl");
+
+            RuleFor(c => c.Expires).NotEmpty()
+                                   .OverridePropertyName("SignIn")
+                                   .WithMessage("Must authenticate with Simkl")
+                                   .When(c => c.AccessToken.IsNotNullOrWhiteSpace() && c.RefreshToken.IsNotNullOrWhiteSpace());
+        }
+    }
+
+    public class SimklSettingsBase<TSettings> : IImportListSettings
+        where TSettings : SimklSettingsBase<TSettings>
+    {
+        protected virtual AbstractValidator<TSettings> Validator => new SimklSettingsBaseValidator<TSettings>();
+
+        public SimklSettingsBase()
+        {
+            BaseUrl = "https://api.simkl.com";
+            SignIn = "startOAuth";
+        }
+
+        public string BaseUrl { get; set; }
+
+        [FieldDefinition(0, Label = "Access Token", Type = FieldType.Textbox, Hidden = HiddenType.Hidden)]
+        public string AccessToken { get; set; }
+
+        [FieldDefinition(0, Label = "Refresh Token", Type = FieldType.Textbox, Hidden = HiddenType.Hidden)]
+        public string RefreshToken { get; set; }
+
+        [FieldDefinition(0, Label = "Expires", Type = FieldType.Textbox, Hidden = HiddenType.Hidden)]
+        public DateTime Expires { get; set; }
+
+        [FieldDefinition(0, Label = "Auth User", Type = FieldType.Textbox, Hidden = HiddenType.Hidden)]
+        public string AuthUser { get; set; }
+
+        [FieldDefinition(99, Label = "Authenticate with Simkl", Type = FieldType.OAuth)]
+        public string SignIn { get; set; }
+
+        public NzbDroneValidationResult Validate()
+        {
+            return new NzbDroneValidationResult(Validator.Validate((TSettings)this));
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserImport.cs b/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserImport.cs
new file mode 100644
index 000000000..d7a9f7908
--- /dev/null
+++ b/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserImport.cs
@@ -0,0 +1,31 @@
+using NLog;
+using NzbDrone.Common.Http;
+using NzbDrone.Core.Configuration;
+using NzbDrone.Core.Parser;
+
+namespace NzbDrone.Core.ImportLists.Simkl.User
+{
+    public class SimklUserImport : SimklImportBase<SimklUserSettings>
+    {
+        public SimklUserImport(IImportListRepository netImportRepository,
+                               IHttpClient httpClient,
+                               IImportListStatusService netImportStatusService,
+                               IConfigService configService,
+                               IParsingService parsingService,
+                               Logger logger)
+        : base(netImportRepository, httpClient, netImportStatusService, configService, parsingService, logger)
+        {
+        }
+
+        public override string Name => "Simkl User Watchlist";
+
+        public override IImportListRequestGenerator GetRequestGenerator()
+        {
+            return new SimklUserRequestGenerator()
+            {
+                Settings = Settings,
+                ClientId = ClientId
+            };
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserListType.cs b/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserListType.cs
new file mode 100644
index 000000000..e00bc60ac
--- /dev/null
+++ b/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserListType.cs
@@ -0,0 +1,18 @@
+using System.Runtime.Serialization;
+
+namespace NzbDrone.Core.ImportLists.Simkl.User
+{
+    public enum SimklUserListType
+    {
+        [EnumMember(Value = "Watching")]
+        Watching = 0,
+        [EnumMember(Value = "Plan To Watch")]
+        PlanToWatch = 1,
+        [EnumMember(Value = "Hold")]
+        Hold = 2,
+        [EnumMember(Value = "Completed")]
+        Completed = 3,
+        [EnumMember(Value = "Dropped")]
+        Dropped = 4
+    }
+}
diff --git a/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserRequestGenerator.cs b/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserRequestGenerator.cs
new file mode 100644
index 000000000..3f30be390
--- /dev/null
+++ b/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserRequestGenerator.cs
@@ -0,0 +1,42 @@
+using System.Collections.Generic;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Common.Http;
+
+namespace NzbDrone.Core.ImportLists.Simkl.User
+{
+    public class SimklUserRequestGenerator : IImportListRequestGenerator
+    {
+        public SimklUserSettings Settings { get; set; }
+
+        public string ClientId { get; set; }
+
+        public SimklUserRequestGenerator()
+        {
+        }
+
+        public virtual ImportListPageableRequestChain GetListItems()
+        {
+            var pageableRequests = new ImportListPageableRequestChain();
+
+            pageableRequests.Add(GetSeriesRequest());
+
+            return pageableRequests;
+        }
+
+        private IEnumerable<ImportListRequest> GetSeriesRequest()
+        {
+            var link = $"{Settings.BaseUrl.Trim()}/sync/all-items/shows/{((SimklUserListType)Settings.ListType).ToString().ToLowerInvariant()}";
+
+            var request = new ImportListRequest(link, HttpAccept.Json);
+
+            request.HttpRequest.Headers.Add("simkl-api-key", ClientId);
+
+            if (Settings.AccessToken.IsNotNullOrWhiteSpace())
+            {
+                request.HttpRequest.Headers.Add("Authorization", "Bearer " + Settings.AccessToken);
+            }
+
+            yield return request;
+        }
+    }
+}
diff --git a/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserSettings.cs b/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserSettings.cs
new file mode 100644
index 000000000..61cc48129
--- /dev/null
+++ b/src/NzbDrone.Core/ImportLists/Simkl/User/SimklUserSettings.cs
@@ -0,0 +1,27 @@
+using FluentValidation;
+using NzbDrone.Core.Annotations;
+
+namespace NzbDrone.Core.ImportLists.Simkl.User
+{
+    public class SimklUserSettingsValidator : SimklSettingsBaseValidator<SimklUserSettings>
+    {
+        public SimklUserSettingsValidator()
+        : base()
+        {
+            RuleFor(c => c.ListType).NotNull();
+        }
+    }
+
+    public class SimklUserSettings : SimklSettingsBase<SimklUserSettings>
+    {
+        protected override AbstractValidator<SimklUserSettings> Validator => new SimklUserSettingsValidator();
+
+        public SimklUserSettings()
+        {
+            ListType = (int)SimklUserListType.Watching;
+        }
+
+        [FieldDefinition(1, Label = "List Type", Type = FieldType.Select, SelectOptions = typeof(SimklUserListType), HelpText = "Type of list you're seeking to import from")]
+        public int ListType { get; set; }
+    }
+}