diff --git a/ArchiSteamFarm.CustomPlugins.SignInWithSteam/ArchiSteamFarm.CustomPlugins.SignInWithSteam.csproj b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/ArchiSteamFarm.CustomPlugins.SignInWithSteam.csproj
new file mode 100644
index 000000000..ada1e2f38
--- /dev/null
+++ b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/ArchiSteamFarm.CustomPlugins.SignInWithSteam.csproj
@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+	<PropertyGroup>
+		<OutputType>Library</OutputType>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="AngleSharp.XPath" IncludeAssets="compile" />
+		<PackageReference Include="ConfigureAwaitChecker.Analyzer" PrivateAssets="all" />
+		<PackageReference Include="JetBrains.Annotations" PrivateAssets="all" />
+		<PackageReference Include="Newtonsoft.Json" IncludeAssets="compile" />
+		<PackageReference Include="System.Composition.AttributedModel" IncludeAssets="compile" />
+	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'net481'">
+		<!-- Madness is already included in netf build of ASF, so we don't need to emit it ourselves -->
+		<PackageReference Update="JustArchiNET.Madness" IncludeAssets="compile" />
+
+		<PackageReference Include="Microsoft.AspNetCore.Mvc.Core" IncludeAssets="compile" />
+	</ItemGroup>
+
+	<ItemGroup>
+		<ProjectReference Include="..\ArchiSteamFarm\ArchiSteamFarm.csproj" ExcludeAssets="all" Private="false" />
+	</ItemGroup>
+</Project>
diff --git a/ArchiSteamFarm.CustomPlugins.SignInWithSteam/AssemblyInfo.cs b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/AssemblyInfo.cs
new file mode 100644
index 000000000..6ad4b4efb
--- /dev/null
+++ b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/AssemblyInfo.cs
@@ -0,0 +1,24 @@
+//     _                _      _  ____   _                           _____
+//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+// |
+// Copyright 2015-2023 Łukasz "JustArchi" Domeradzki
+// Contact: JustArchi@JustArchi.net
+// |
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// |
+// http://www.apache.org/licenses/LICENSE-2.0
+// |
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+
+[assembly: CLSCompliant(false)]
diff --git a/ArchiSteamFarm.CustomPlugins.SignInWithSteam/Data/SignInWithSteamRequest.cs b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/Data/SignInWithSteamRequest.cs
new file mode 100644
index 000000000..050822578
--- /dev/null
+++ b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/Data/SignInWithSteamRequest.cs
@@ -0,0 +1,30 @@
+//     _                _      _  ____   _                           _____
+//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+// |
+// Copyright 2015-2023 Łukasz "JustArchi" Domeradzki
+// Contact: JustArchi@JustArchi.net
+// |
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// |
+// http://www.apache.org/licenses/LICENSE-2.0
+// |
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+using Newtonsoft.Json;
+
+namespace ArchiSteamFarm.CustomPlugins.SignInWithSteam.Data;
+
+public sealed class SignInWithSteamRequest {
+	[JsonProperty(Required = Required.Always)]
+	public Uri RedirectURL { get; private set; } = null!;
+}
diff --git a/ArchiSteamFarm.CustomPlugins.SignInWithSteam/Data/SignInWithSteamResponse.cs b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/Data/SignInWithSteamResponse.cs
new file mode 100644
index 000000000..b24ccccab
--- /dev/null
+++ b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/Data/SignInWithSteamResponse.cs
@@ -0,0 +1,32 @@
+//     _                _      _  ____   _                           _____
+//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+// |
+// Copyright 2015-2023 Łukasz "JustArchi" Domeradzki
+// Contact: JustArchi@JustArchi.net
+// |
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// |
+// http://www.apache.org/licenses/LICENSE-2.0
+// |
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+using Newtonsoft.Json;
+
+namespace ArchiSteamFarm.CustomPlugins.SignInWithSteam.Data;
+
+public sealed class SignInWithSteamResponse {
+	[JsonProperty(Required = Required.Always)]
+	public Uri ReturnURL { get; private set; }
+
+	internal SignInWithSteamResponse(Uri returnURL) => ReturnURL = returnURL ?? throw new ArgumentNullException(nameof(returnURL));
+}
diff --git a/ArchiSteamFarm.CustomPlugins.SignInWithSteam/SignInWithSteamController.cs b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/SignInWithSteamController.cs
new file mode 100644
index 000000000..113cf4bfe
--- /dev/null
+++ b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/SignInWithSteamController.cs
@@ -0,0 +1,119 @@
+//     _                _      _  ____   _                           _____
+//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+// |
+// Copyright 2015-2023 Łukasz "JustArchi" Domeradzki
+// Contact: JustArchi@JustArchi.net
+// |
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// |
+// http://www.apache.org/licenses/LICENSE-2.0
+// |
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+using System.Globalization;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using AngleSharp.Dom;
+using ArchiSteamFarm.Core;
+using ArchiSteamFarm.CustomPlugins.SignInWithSteam.Data;
+using ArchiSteamFarm.IPC.Controllers.Api;
+using ArchiSteamFarm.IPC.Responses;
+using ArchiSteamFarm.Localization;
+using ArchiSteamFarm.Steam;
+using ArchiSteamFarm.Steam.Integration;
+using ArchiSteamFarm.Web;
+using ArchiSteamFarm.Web.Responses;
+using Microsoft.AspNetCore.Mvc;
+
+namespace ArchiSteamFarm.CustomPlugins.SignInWithSteam;
+
+[Route("/Api/Bot/{botName:required}/SignInWithSteam")]
+public sealed class SignInWithSteamController : ArchiController {
+	[HttpPost]
+	[ProducesResponseType(typeof(GenericResponse<SignInWithSteamResponse>), (int) HttpStatusCode.OK)]
+	[ProducesResponseType(typeof(GenericResponse), (int) HttpStatusCode.BadRequest)]
+	[ProducesResponseType(typeof(GenericResponse), (int) HttpStatusCode.ServiceUnavailable)]
+	public async Task<ActionResult<GenericResponse>> Post(string botName, [FromBody] SignInWithSteamRequest request) {
+		ArgumentException.ThrowIfNullOrEmpty(botName);
+		ArgumentNullException.ThrowIfNull(request);
+
+		Bot? bot = Bot.GetBot(botName);
+
+		if (bot == null) {
+			return BadRequest(new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.BotNotFound, botName)));
+		}
+
+		if (!bot.IsConnectedAndLoggedOn) {
+			return StatusCode((int) HttpStatusCode.ServiceUnavailable, new GenericResponse(false, Strings.BotNotConnected));
+		}
+
+		// We've got a redirection, initiate OpenID procedure by following it
+		using HtmlDocumentResponse? challengeResponse = await bot.ArchiWebHandler.UrlGetToHtmlDocumentWithSession(request.RedirectURL).ConfigureAwait(false);
+
+		if (challengeResponse?.Content == null) {
+			return StatusCode((int) HttpStatusCode.ServiceUnavailable, new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorRequestFailedTooManyTimes, WebBrowser.MaxTries)));
+		}
+
+		IAttr? paramsNode = challengeResponse.Content.SelectSingleNode<IAttr>("//input[@name='openidparams']/@value");
+
+		if (paramsNode == null) {
+			ASF.ArchiLogger.LogNullError(paramsNode);
+
+			return StatusCode((int) HttpStatusCode.InternalServerError, new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorObjectIsNull, nameof(paramsNode))));
+		}
+
+		string paramsValue = paramsNode.Value;
+
+		if (string.IsNullOrEmpty(paramsValue)) {
+			ASF.ArchiLogger.LogNullError(paramsValue);
+
+			return StatusCode((int) HttpStatusCode.InternalServerError, new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorObjectIsNull, nameof(paramsValue))));
+		}
+
+		IAttr? nonceNode = challengeResponse.Content.SelectSingleNode<IAttr>("//input[@name='nonce']/@value");
+
+		if (nonceNode == null) {
+			ASF.ArchiLogger.LogNullError(nonceNode);
+
+			return StatusCode((int) HttpStatusCode.InternalServerError, new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorObjectIsNull, nameof(nonceNode))));
+		}
+
+		string nonceValue = nonceNode.Value;
+
+		if (string.IsNullOrEmpty(nonceValue)) {
+			ASF.ArchiLogger.LogNullError(nonceValue);
+
+			return StatusCode((int) HttpStatusCode.InternalServerError, new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorObjectIsNull, nameof(nonceValue))));
+		}
+
+		Uri loginRequest = new(ArchiWebHandler.SteamCommunityURL, "/openid/login");
+
+		using StringContent actionContent = new("steam_openid_login");
+		using StringContent modeContent = new("checkid_setup");
+		using StringContent paramsContent = new(paramsValue);
+		using StringContent nonceContent = new(nonceValue);
+
+		using MultipartFormDataContent data = new();
+
+		data.Add(actionContent, "action");
+		data.Add(modeContent, "openid.mode");
+		data.Add(paramsContent, "openidparams");
+		data.Add(nonceContent, "nonce");
+
+		// Accept OpenID request presented and follow redirection back to the data we initially expected
+		BasicResponse? loginResponse = await bot.ArchiWebHandler.WebBrowser.UrlPost(loginRequest, data: data, requestOptions: WebBrowser.ERequestOptions.ReturnRedirections).ConfigureAwait(false);
+
+		return loginResponse != null ? Ok(new GenericResponse<SignInWithSteamResponse>(new SignInWithSteamResponse(loginResponse.FinalUri))) : StatusCode((int) HttpStatusCode.ServiceUnavailable, new GenericResponse(false, string.Format(CultureInfo.CurrentCulture, Strings.ErrorRequestFailedTooManyTimes, WebBrowser.MaxTries)));
+	}
+}
diff --git a/ArchiSteamFarm.CustomPlugins.SignInWithSteam/SignInWithSteamPlugin.cs b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/SignInWithSteamPlugin.cs
new file mode 100644
index 000000000..502087dce
--- /dev/null
+++ b/ArchiSteamFarm.CustomPlugins.SignInWithSteam/SignInWithSteamPlugin.cs
@@ -0,0 +1,43 @@
+//     _                _      _  ____   _                           _____
+//    / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+//   / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+//  / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+// /_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+// |
+// Copyright 2015-2023 Łukasz "JustArchi" Domeradzki
+// Contact: JustArchi@JustArchi.net
+// |
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// |
+// http://www.apache.org/licenses/LICENSE-2.0
+// |
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+using System.Composition;
+using System.Threading.Tasks;
+using ArchiSteamFarm.Core;
+using ArchiSteamFarm.Plugins.Interfaces;
+using JetBrains.Annotations;
+
+namespace ArchiSteamFarm.CustomPlugins.SignInWithSteam;
+
+[Export(typeof(IPlugin))]
+[UsedImplicitly]
+internal sealed class SignInWithSteamPlugin : IPlugin {
+	public string Name => nameof(SignInWithSteamPlugin);
+
+	public Version Version => typeof(SignInWithSteamPlugin).Assembly.GetName().Version ?? throw new InvalidOperationException(nameof(Version));
+
+	public Task OnLoaded() {
+		ASF.ArchiLogger.LogGenericInfo("Loaded!");
+
+		return Task.CompletedTask;
+	}
+}
diff --git a/ArchiSteamFarm.sln b/ArchiSteamFarm.sln
index 83aca52e9..da08c73f0 100644
--- a/ArchiSteamFarm.sln
+++ b/ArchiSteamFarm.sln
@@ -15,6 +15,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ArchiSteamFarm.OfficialPlug
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ArchiSteamFarm.OfficialPlugins.ItemsMatcher", "ArchiSteamFarm.OfficialPlugins.ItemsMatcher\ArchiSteamFarm.OfficialPlugins.ItemsMatcher.csproj", "{A8BA3425-2EE4-4333-9905-8867EDFE327F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ArchiSteamFarm.CustomPlugins.SignInWithSteam", "ArchiSteamFarm.CustomPlugins.SignInWithSteam\ArchiSteamFarm.CustomPlugins.SignInWithSteam.csproj", "{27E35B1D-AA85-4D54-978B-520BF88DA0B7}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -61,5 +63,11 @@ Global
 		{A8BA3425-2EE4-4333-9905-8867EDFE327F}.DebugFast|Any CPU.Build.0 = Debug|Any CPU
 		{A8BA3425-2EE4-4333-9905-8867EDFE327F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A8BA3425-2EE4-4333-9905-8867EDFE327F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{27E35B1D-AA85-4D54-978B-520BF88DA0B7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{27E35B1D-AA85-4D54-978B-520BF88DA0B7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{27E35B1D-AA85-4D54-978B-520BF88DA0B7}.DebugFast|Any CPU.ActiveCfg = Debug|Any CPU
+		{27E35B1D-AA85-4D54-978B-520BF88DA0B7}.DebugFast|Any CPU.Build.0 = Debug|Any CPU
+		{27E35B1D-AA85-4D54-978B-520BF88DA0B7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{27E35B1D-AA85-4D54-978B-520BF88DA0B7}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal