├── .gitattributes ├── .gitignore ├── DeepSeek.NET.sln ├── DeepSeek.NET ├── .vscode │ └── settings.json ├── Classes │ ├── ChatRequest │ │ └── ChatRequest.cs │ ├── ChatResponse │ │ ├── ChatResponse.cs │ │ ├── Choice.cs │ │ ├── Content.cs │ │ ├── Logprobs.cs │ │ ├── TopLogprobs.cs │ │ └── Usage.cs │ ├── Message.cs │ └── ModelResponse │ │ ├── Model.cs │ │ └── ModelResponse.cs ├── Constant.cs ├── DeepSeek.NET.csproj └── DeepSeekClient.cs ├── DeepSeek.NETTests ├── DeepSeek.NETTests.csproj └── DeepSeekClientTests.cs ├── LICENSE.txt └── README.md /.gitattributes: -------------------------------------------------------------------------------- 1 | ############################################################################### 2 | # Set default behavior to automatically normalize line endings. 3 | ############################################################################### 4 | * text=auto 5 | 6 | ############################################################################### 7 | # Set default behavior for command prompt diff. 8 | # 9 | # This is need for earlier builds of msysgit that does not have it on by 10 | # default for csharp files. 11 | # Note: This is only used by command line 12 | ############################################################################### 13 | #*.cs diff=csharp 14 | 15 | ############################################################################### 16 | # Set the merge driver for project and solution files 17 | # 18 | # Merging from the command prompt will add diff markers to the files if there 19 | # are conflicts (Merging from VS is not affected by the settings below, in VS 20 | # the diff markers are never inserted). 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auto-generated XML schema 363 | FodyWeavers.xsd -------------------------------------------------------------------------------- /DeepSeek.NET.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 17 4 | VisualStudioVersion = 17.13.35507.96 d17.13 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DeepSeek.NET", "DeepSeek.NET\DeepSeek.NET.csproj", "{8DCDFADF-8F54-4816-9D9B-F47A5EC0A9AC}" 7 | EndProject 8 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DeepSeek.NETTests", "DeepSeek.NETTests\DeepSeek.NETTests.csproj", "{637EACA7-E58E-407C-83A1-55B4AF597874}" 9 | EndProject 10 | Global 11 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 12 | Debug|Any CPU = Debug|Any CPU 13 | Release|Any CPU = Release|Any CPU 14 | EndGlobalSection 15 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 16 | {8DCDFADF-8F54-4816-9D9B-F47A5EC0A9AC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 17 | {8DCDFADF-8F54-4816-9D9B-F47A5EC0A9AC}.Debug|Any CPU.Build.0 = Debug|Any CPU 18 | {8DCDFADF-8F54-4816-9D9B-F47A5EC0A9AC}.Release|Any CPU.ActiveCfg = Release|Any CPU 19 | {8DCDFADF-8F54-4816-9D9B-F47A5EC0A9AC}.Release|Any CPU.Build.0 = Release|Any CPU 20 | {637EACA7-E58E-407C-83A1-55B4AF597874}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 21 | {637EACA7-E58E-407C-83A1-55B4AF597874}.Debug|Any CPU.Build.0 = Debug|Any CPU 22 | {637EACA7-E58E-407C-83A1-55B4AF597874}.Release|Any CPU.ActiveCfg = Release|Any CPU 23 | {637EACA7-E58E-407C-83A1-55B4AF597874}.Release|Any CPU.Build.0 = Release|Any CPU 24 | EndGlobalSection 25 | GlobalSection(SolutionProperties) = preSolution 26 | HideSolutionNode = FALSE 27 | EndGlobalSection 28 | GlobalSection(ExtensibilityGlobals) = postSolution 29 | SolutionGuid = {6F74EA4B-150E-4F4C-8B45-1915E23698B1} 30 | EndGlobalSection 31 | EndGlobal 32 | -------------------------------------------------------------------------------- /DeepSeek.NET/.vscode/settings.json: -------------------------------------------------------------------------------- 1 | { 2 | "MicroPython.executeButton": [ 3 | { 4 | "text": "▶", 5 | "tooltip": "Run", 6 | "alignment": "left", 7 | "command": "extension.executeFile", 8 | "priority": 3.5 9 | } 10 | ], 11 | "MicroPython.syncButton": [ 12 | { 13 | "text": "$(sync)", 14 | "tooltip": "sync", 15 | "alignment": "left", 16 | "command": "extension.execute", 17 | "priority": 4 18 | } 19 | ] 20 | } -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ChatRequest/ChatRequest.cs: -------------------------------------------------------------------------------- 1 | using System.Text.Json.Serialization; 2 | 3 | namespace DeepSeek.Classes; 4 | 5 | /// 6 | /// Chat request 7 | /// 8 | public class ChatRequest 9 | { 10 | /// 11 | /// List of messages 12 | /// 13 | public Message[] Messages { get; set; } = Array.Empty(); 14 | 15 | /// 16 | /// The ID of the model to use. You can use deepseek-chat or deepseek-coder. 17 | /// 18 | public string? Model { get; set; } 19 | 20 | /// 21 | /// A number between -2.0 and 2.0. Positive values penalize new tokens based on their existing frequency in the text so far, reducing the model's likelihood to repeat the same content. 22 | /// 23 | [JsonPropertyName("frequency_penalty")] 24 | public double FrequencyPenalty { get; set; } = 0; 25 | 26 | /// 27 | /// The maximum number of tokens allowed for the generated completion in a single request. The total length of input tokens and output tokens is limited by the model's context length. 28 | /// default: 4096 29 | /// 30 | [JsonPropertyName("max_tokens")] 31 | public long MaxTokens { get; set; } = 4096; 32 | 33 | /// 34 | /// A number between -2.0 and 2.0. Positive values penalize new tokens based on whether they appear in the text so far, increasing the model's likelihood to talk about new topics. 35 | /// 36 | [JsonPropertyName("presence_penalty")] 37 | public double PresencePenalty { get; set; } = 0; 38 | 39 | /// 40 | /// A list of up to 4 strings. The API will stop generating further tokens upon encountering any of these strings. 41 | /// 42 | public List Stop { get; set; } = []; 43 | 44 | /// 45 | /// If set to true, messages will be sent incrementally in a stream using SSE (server-sent events). The message stream ends with data: [DONE]. 46 | /// 47 | [JsonInclude] 48 | internal bool Stream { get; set; } 49 | 50 | /// 51 | /// Sampling temperature, between 0 and 2. Higher values like 0.8 make the output more random, while lower values like 0.2 make it more focused and deterministic. We generally recommend adjusting this or top_p, but not both. 52 | /// 53 | public double Temperature { get; set; } = 1; 54 | 55 | /// 56 | /// An alternative to sampling with temperature, the model considers the results of the top_p probability tokens. So 0.1 means only the tokens comprising the top 10% probability mass are considered. We generally recommend adjusting this or temperature, but not both. 57 | /// 58 | [JsonPropertyName("top_p")] 59 | public double TopP { get; set; } = 1; 60 | 61 | /// 62 | /// Whether to return the log probabilities of the output tokens. If true, the log probabilities of each output token are returned in the content of the message. 63 | /// 64 | public bool Logprobs { get; set; } 65 | 66 | /// 67 | /// An integer N between 0 and 20, specifying the top N tokens with the highest probabilities to return for each output position, along with their log probabilities. If this parameter is specified, logprobs must be true. 68 | /// 69 | [JsonPropertyName("top_logprobs")] 70 | public int? TopLogprobs { get; set; } 71 | } -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ChatResponse/ChatResponse.cs: -------------------------------------------------------------------------------- 1 | namespace DeepSeek.Classes; 2 | 3 | /// 4 | /// Chat response 5 | /// 6 | public class ChatResponse 7 | { 8 | /// 9 | /// The unique identifier for the conversation. 10 | /// 11 | public string? Id { get; set; } 12 | 13 | /// 14 | /// A list of choices generated by the model for the completion. 15 | /// 16 | public List Choices { get; set; } = []; 17 | 18 | /// 19 | /// The name of the model used to generate the completion. 20 | /// 21 | public string? Model { get; set; } 22 | 23 | /// 24 | /// The Unix timestamp (in seconds) when the chat completion was created. 25 | /// 26 | public long Created { get; set; } 27 | 28 | /// 29 | /// The type of object, which is "chat.completion". 30 | /// 31 | public string Object { get; set; } = "chat.completion"; 32 | 33 | /// 34 | /// Usage information for the chat completion request. 35 | /// 36 | public Usage? Usage { get; set; } 37 | } -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ChatResponse/Choice.cs: -------------------------------------------------------------------------------- 1 | using System.Text.Json.Serialization; 2 | 3 | namespace DeepSeek.Classes; 4 | 5 | /// 6 | /// A choice generated by the model. 7 | /// 8 | public class Choice 9 | { 10 | [JsonPropertyName("finish_reason")] 11 | public string? FinishReason { get; set; } 12 | 13 | public long Index { get; set; } 14 | 15 | public Message? Message { get; set; } 16 | 17 | /// 18 | /// Log probability information for this choice. 19 | /// 20 | public Logprobs? Logprobs { get; set; } 21 | 22 | /// 23 | /// Incremental content returned in streaming mode. 24 | /// 25 | public Message? Delta { get; set; } 26 | } 27 | -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ChatResponse/Content.cs: -------------------------------------------------------------------------------- 1 | using System.Text.Json.Serialization; 2 | 3 | namespace DeepSeek.Classes; 4 | 5 | /// 6 | /// Log probability information for a specific token. 7 | /// 8 | public class Content 9 | { 10 | public string? Token { get; set; } 11 | 12 | public long Logprob { get; set; } 13 | 14 | public byte[] Bytes { get; set; } = []; 15 | 16 | [JsonPropertyName("top_logprobs")] 17 | public List TopLogprobs { get; set; } = []; 18 | } 19 | -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ChatResponse/Logprobs.cs: -------------------------------------------------------------------------------- 1 | namespace DeepSeek.Classes; 2 | 3 | /// 4 | /// Log probability information. 5 | /// 6 | public class Logprobs 7 | { 8 | /// 9 | /// A list containing log probability information for the output tokens. 10 | /// 11 | public List Content { get; set; } = []; 12 | } 13 | -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ChatResponse/TopLogprobs.cs: -------------------------------------------------------------------------------- 1 | namespace DeepSeek.Classes; 2 | 3 | /// 4 | /// Top log probability information for a specific token. 5 | /// 6 | public class TopLogprobs 7 | { 8 | public string? Token { get; set; } 9 | 10 | public long Logprob { get; set; } 11 | 12 | public byte[] Bytes { get; set; } = []; 13 | } 14 | -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ChatResponse/Usage.cs: -------------------------------------------------------------------------------- 1 | using System.Text.Json.Serialization; 2 | 3 | namespace DeepSeek.Classes; 4 | 5 | /// 6 | /// Usage information for the request. 7 | /// 8 | public class Usage 9 | { 10 | [JsonPropertyName("completion_tokens")] 11 | public long CompletionTokens { get; set; } 12 | 13 | [JsonPropertyName("prompt_tokens")] 14 | public long PromptTokens { get; set; } 15 | 16 | [JsonPropertyName("total_tokens")] 17 | public long TotalTokens { get; set; } 18 | 19 | [JsonPropertyName("prompt_cache_hit_tokens")] 20 | public long PromptCacheHitTokens { get; set; } 21 | 22 | [JsonPropertyName("prompt_cache_miss_tokens")] 23 | public long PromptCacheMissTokens { get; set; } 24 | } 25 | -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/Message.cs: -------------------------------------------------------------------------------- 1 | using System.Text.Json.Serialization; 2 | 3 | namespace DeepSeek.Classes; 4 | 5 | public class Message 6 | { 7 | public string Content { get; set; } = string.Empty; 8 | 9 | [JsonPropertyName("reasoning_content")] 10 | public string ReasoningContent { get; set; } = string.Empty; 11 | public string Role { get; set; } = string.Empty; 12 | 13 | 14 | public static Message NewUserMessage(string content) 15 | { 16 | return new Message 17 | { 18 | Content = content, 19 | Role = "user" 20 | }; 21 | } 22 | 23 | public static Message NewSystemMessage(string content) 24 | { 25 | return new Message 26 | { 27 | Content = content, 28 | Role = "system" 29 | }; 30 | } 31 | 32 | public static Message NewAssistantMessage(string content) 33 | { 34 | return new Message 35 | { 36 | Content = content, 37 | Role = "assistant" 38 | }; 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ModelResponse/Model.cs: -------------------------------------------------------------------------------- 1 | using System.Text.Json.Serialization; 2 | 3 | namespace DeepSeek.Classes; 4 | 5 | public class Model 6 | { 7 | public string? Id { get; set; } 8 | public string? Object { get; set; } 9 | 10 | 11 | [JsonPropertyName("owned_by")] 12 | public string? OwnedBy { get; set; } 13 | } 14 | 15 | -------------------------------------------------------------------------------- /DeepSeek.NET/Classes/ModelResponse/ModelResponse.cs: -------------------------------------------------------------------------------- 1 | namespace DeepSeek.Classes; 2 | 3 | public class ModelResponse 4 | { 5 | public string? Object { get; set; } 6 | public List Data { get; set; } = []; 7 | } -------------------------------------------------------------------------------- /DeepSeek.NET/Constant.cs: -------------------------------------------------------------------------------- 1 | namespace DeepSeek; 2 | 3 | public static class Constants 4 | { 5 | 6 | /// 7 | /// Base domain for API requests 8 | /// 9 | public const string BaseAddress = "https://api.deepseek.com"; 10 | 11 | /// 12 | /// Chat completions endpoint 13 | /// 14 | public const string CompletionEndpoint = "/chat/completions"; 15 | 16 | /// 17 | /// Models list endpoint 18 | /// 19 | public const string ModelsEndpoint = "/models"; 20 | 21 | /// 22 | /// Stream completion indicator 23 | /// 24 | public const string StreamDoneSign = "[DONE]"; 25 | } 26 | 27 | 28 | public static class Models 29 | { 30 | public const string ModelChat = "deepseek-chat"; 31 | 32 | public const string ModelReasoner = "deepseek-reasoner"; 33 | } 34 | -------------------------------------------------------------------------------- /DeepSeek.NET/DeepSeek.NET.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | net8.0 5 | enable 6 | enable 7 | True 8 | Added ReasoningContent 9 | A modern .NET wrapper for the DeepSeek AI API 10 | LuisLlamas 11 | A modern .NET wrapper for the DeepSeek AI API – integrate conversational AI into your applications with ease. 12 | README.md 13 | https://github.com/luisllamasbinaburo/deepseeknet 14 | git 15 | LICENSE.txt 16 | $(NoWarn);NU5104 17 | 1.2.0 18 | 19 | 20 | 21 | 22 | True 23 | \ 24 | 25 | 26 | True 27 | \ 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | -------------------------------------------------------------------------------- /DeepSeek.NET/DeepSeekClient.cs: -------------------------------------------------------------------------------- 1 | using DeepSeek.Classes; 2 | using Microsoft.Extensions.AI; 3 | using System.Diagnostics.CodeAnalysis; 4 | using System.Net.Http.Json; 5 | using System.Runtime.CompilerServices; 6 | using System.Text; 7 | using System.Text.Encodings.Web; 8 | using System.Text.Json; 9 | using System.Text.Json.Serialization; 10 | using System.Text.Unicode; 11 | using System.Threading.Channels; 12 | 13 | namespace DeepSeek; 14 | 15 | public class DeepSeekClient : IChatClient, IDisposable 16 | { 17 | private readonly HttpClient _httpClient; 18 | private bool _disposed; 19 | private readonly ChatClientMetadata _metadata = new("deepseek", new Uri(Constants.BaseAddress)); 20 | 21 | public JsonSerializerOptions JsonSerializerOptions { get; } = new() 22 | { 23 | ReferenceHandler = ReferenceHandler.IgnoreCycles, 24 | PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower, 25 | Encoder = JavaScriptEncoder.Create(UnicodeRanges.All), 26 | DefaultBufferSize = 1024 27 | }; 28 | 29 | public string? ErrorMessage { get; private set; } 30 | 31 | public DeepSeekClient(HttpClient httpClient, string apiKey) 32 | { 33 | _httpClient = httpClient ?? throw new ArgumentNullException(nameof(httpClient)); 34 | ConfigureHttpClient(apiKey); 35 | } 36 | 37 | public DeepSeekClient(string apiKey) : this(new HttpClient(), apiKey) 38 | { 39 | _httpClient.Timeout = TimeSpan.FromSeconds(60); 40 | } 41 | 42 | private void ConfigureHttpClient(string apiKey) 43 | { 44 | _httpClient.BaseAddress = new Uri(Constants.BaseAddress); 45 | _httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", $"Bearer {apiKey}"); 46 | } 47 | 48 | public void SetTimeout(int seconds) 49 | { 50 | if (seconds <= 0) throw new ArgumentOutOfRangeException(nameof(seconds)); 51 | _httpClient.Timeout = TimeSpan.FromSeconds(seconds); 52 | } 53 | 54 | public async Task ListModelsAsync(CancellationToken cancellationToken = default) 55 | { 56 | using var response = await _httpClient.GetAsync(Constants.ModelsEndpoint, cancellationToken); 57 | 58 | if (!response.IsSuccessStatusCode) 59 | { 60 | await HandleErrorResponse(response); 61 | return null; 62 | } 63 | 64 | return await response.Content.ReadFromJsonAsync(JsonSerializerOptions, cancellationToken); 65 | } 66 | 67 | /// 68 | /// Creates a chat completion 69 | /// 70 | /// Chat request parameters 71 | /// Chat response or null if failed 72 | public async Task ChatAsync(ChatRequest request, CancellationToken cancellationToken = default) 73 | { 74 | request.Stream = false; 75 | using var content = JsonContent.Create(request, options: JsonSerializerOptions); 76 | 77 | using var response = await _httpClient.PostAsync(Constants.CompletionEndpoint, content, cancellationToken); 78 | 79 | if (!response.IsSuccessStatusCode) 80 | { 81 | await HandleErrorResponse(response); 82 | return null; 83 | } 84 | 85 | return await response.Content.ReadFromJsonAsync(JsonSerializerOptions, cancellationToken); 86 | } 87 | 88 | /// 89 | /// Creates a streaming chat completion 90 | /// 91 | /// Async enumerable of choices 92 | public async Task?> ChatStreamAsync(ChatRequest request, CancellationToken cancellationToken) 93 | { 94 | request.Stream = true; 95 | var content = new StringContent(JsonSerializer.Serialize(request, JsonSerializerOptions), Encoding.UTF8, "application/json"); 96 | 97 | var requestMessage = new HttpRequestMessage(HttpMethod.Post, Constants.CompletionEndpoint) 98 | { 99 | Content = content, 100 | }; 101 | var response = await _httpClient.SendAsync(requestMessage, HttpCompletionOption.ResponseHeadersRead, cancellationToken); 102 | 103 | if (response.IsSuccessStatusCode) 104 | { 105 | var stream = await response.Content.ReadAsStreamAsync(); 106 | return ProcessStream(stream); 107 | } 108 | else 109 | { 110 | var res = await response.Content.ReadAsStringAsync(); 111 | ErrorMessage = res; 112 | return null; 113 | } 114 | } 115 | 116 | private IAsyncEnumerable ProcessStream(Stream stream) 117 | { 118 | var reader = new StreamReader(stream); 119 | 120 | var channel = Channel.CreateUnbounded(); 121 | _ = Task.Run(async () => 122 | { 123 | while (true) 124 | { 125 | var line = await reader.ReadLineAsync(); 126 | if (line is null) 127 | { 128 | break; 129 | } 130 | 131 | line = line?.Replace("data:", "").Trim(); 132 | 133 | if (line == Constants.StreamDoneSign) break; 134 | if (string.IsNullOrWhiteSpace(line)) continue; 135 | 136 | var chatResponse = JsonSerializer.Deserialize(line, JsonSerializerOptions); 137 | 138 | var choice = chatResponse?.Choices.FirstOrDefault(); 139 | if (choice is null) continue; 140 | 141 | await channel.Writer.WriteAsync(choice); 142 | } 143 | channel.Writer.Complete(); 144 | }); 145 | 146 | return channel.Reader.ReadAllAsync(); 147 | } 148 | 149 | private async Task HandleErrorResponse(HttpResponseMessage response) 150 | { 151 | ErrorMessage = $"HTTP {response.StatusCode}: {await response.Content.ReadAsStringAsync()}"; 152 | } 153 | 154 | public void Dispose() 155 | { 156 | if (_disposed) return; 157 | _httpClient.Dispose(); 158 | _disposed = true; 159 | GC.SuppressFinalize(this); 160 | } 161 | 162 | #region IChatClient 163 | async Task IChatClient.GetResponseAsync(IEnumerable messages, ChatOptions? options, CancellationToken cancellationToken) 164 | { 165 | ChatRequest request = CreateChatRequest(messages, options); 166 | 167 | DeepSeek.Classes.ChatResponse? response = await ChatAsync(request, cancellationToken); 168 | ThrowIfRequestFailed(response); 169 | 170 | return CreateMeaiChatResponse(response); 171 | } 172 | 173 | async IAsyncEnumerable IChatClient.GetStreamingResponseAsync(IEnumerable messages, ChatOptions? options, [EnumeratorCancellation] CancellationToken cancellationToken) 174 | { 175 | IAsyncEnumerable? choices = await ChatStreamAsync(CreateChatRequest(messages, options), cancellationToken); 176 | ThrowIfRequestFailed(choices); 177 | 178 | string responseId = Guid.NewGuid().ToString("N"); 179 | await foreach (var choice in choices) 180 | { 181 | yield return CreateChatResponseUpdate(choice, responseId); 182 | } 183 | } 184 | 185 | object? IChatClient.GetService(Type serviceType, object? serviceKey) => 186 | serviceKey is not null ? null : 187 | serviceType == typeof(ChatClientMetadata) ? _metadata : 188 | serviceType?.IsInstanceOfType(this) is true ? this : 189 | null; 190 | 191 | private void ThrowIfRequestFailed([NotNull] object? response) 192 | { 193 | if (response is null) 194 | { 195 | throw new InvalidOperationException(string.IsNullOrWhiteSpace(ErrorMessage) ? 196 | $"Failed to get response" : 197 | $"Failed to get response: {ErrorMessage}"); 198 | } 199 | } 200 | 201 | private static Microsoft.Extensions.AI.ChatResponse CreateMeaiChatResponse(DeepSeek.Classes.ChatResponse response) 202 | { 203 | Microsoft.Extensions.AI.ChatResponse completion = new([]) 204 | { 205 | ResponseId = response.Id, 206 | ModelId = response.Model, 207 | CreatedAt = DateTimeOffset.FromUnixTimeSeconds(response.Created) 208 | }; 209 | 210 | if (response.Choices is { Count: > 0 }) 211 | { 212 | completion.FinishReason ??= CreateFinishReason(response.Choices[0]); 213 | completion.Messages.Add(CreateChatMessage(response, response.Choices[0])); 214 | } 215 | 216 | if (response.Usage is Usage usage) 217 | { 218 | completion.Usage = new() 219 | { 220 | InputTokenCount = (int)usage.PromptTokens, 221 | TotalTokenCount = (int)usage.TotalTokens, 222 | OutputTokenCount = (int)usage.CompletionTokens, 223 | AdditionalCounts = new() 224 | { 225 | [nameof(usage.PromptCacheHitTokens)] = (int)usage.PromptCacheHitTokens, 226 | [nameof(usage.PromptCacheMissTokens)] = (int)usage.PromptCacheMissTokens, 227 | }, 228 | }; 229 | } 230 | 231 | return completion; 232 | } 233 | 234 | private static ChatFinishReason? CreateFinishReason(Choice choice) => 235 | choice.FinishReason switch 236 | { 237 | "stop" => ChatFinishReason.Stop, 238 | "length" => ChatFinishReason.Length, 239 | "content_filter" => ChatFinishReason.ContentFilter, 240 | "tool_calls" => ChatFinishReason.ToolCalls, 241 | _ => null, 242 | }; 243 | 244 | private static ChatMessage CreateChatMessage(DeepSeek.Classes.ChatResponse response, Choice choice) 245 | { 246 | Message? choiceMessage = choice.Delta ?? choice.Message; 247 | 248 | ChatMessage m = new(CreateChatRole(choiceMessage), choiceMessage?.Content) 249 | { 250 | MessageId = response.Id, 251 | RawRepresentation = choice, 252 | }; 253 | 254 | if (choice.Logprobs is not null) 255 | { 256 | (m.AdditionalProperties ??= []).Add(nameof(choice.Logprobs), choice.Logprobs); 257 | } 258 | 259 | return m; 260 | } 261 | 262 | private static ChatResponseUpdate CreateChatResponseUpdate(Choice choice, string responseId) 263 | { 264 | Message? choiceMessage = choice.Delta ?? choice.Message; 265 | 266 | ChatResponseUpdate update = new(CreateChatRole(choiceMessage), choiceMessage?.Content) 267 | { 268 | FinishReason = CreateFinishReason(choice), 269 | RawRepresentation = choice, 270 | ResponseId = responseId, 271 | }; 272 | 273 | if (choice.Logprobs is not null) 274 | { 275 | (update.AdditionalProperties ??= []).Add(nameof(choice.Logprobs), choice.Logprobs); 276 | } 277 | 278 | return update; 279 | } 280 | 281 | private static ChatRole CreateChatRole(Message? m) => 282 | m?.Role switch 283 | { 284 | "user" => ChatRole.User, 285 | "system" => ChatRole.System, 286 | _ => ChatRole.Assistant, 287 | }; 288 | 289 | private ChatRequest CreateChatRequest(IEnumerable chatMessages, ChatOptions? options) 290 | { 291 | ChatRequest request = options?.RawRepresentationFactory?.Invoke(this) as ChatRequest ?? new(); 292 | 293 | if (options is not null) 294 | { 295 | if (options.ModelId is not null) request.Model = options.ModelId; 296 | if (options.FrequencyPenalty is not null) request.FrequencyPenalty = options.FrequencyPenalty.Value; 297 | if (options.MaxOutputTokens is not null) request.MaxTokens = options.MaxOutputTokens.Value; 298 | if (options.PresencePenalty is not null) request.PresencePenalty = options.PresencePenalty.Value; 299 | if (options.StopSequences is not null) request.Stop = [.. options.StopSequences]; 300 | if (options.Temperature is not null) request.Temperature = options.Temperature.Value; 301 | if (options.TopP is not null) request.TopP = options.TopP.Value; 302 | } 303 | 304 | List messages = []; 305 | if (request.Messages is not null) 306 | { 307 | messages.AddRange(request.Messages); 308 | } 309 | 310 | foreach (var message in chatMessages) 311 | { 312 | string role; 313 | if (message.Role == ChatRole.User) role = "user"; 314 | else if (message.Role == ChatRole.Assistant) role = "assistant"; 315 | else if (message.Role == ChatRole.System) role = "system"; 316 | else continue; 317 | 318 | string text = string.Concat(message.Contents.OfType()); 319 | 320 | if (!string.IsNullOrWhiteSpace(text)) 321 | { 322 | messages.Add(new() { Content = text, Role = role }); 323 | } 324 | } 325 | 326 | request.Messages = messages.ToArray(); 327 | return request; 328 | } 329 | #endregion 330 | } -------------------------------------------------------------------------------- /DeepSeek.NETTests/DeepSeek.NETTests.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | net8.0 5 | latest 6 | enable 7 | enable 8 | 12 | true 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /DeepSeek.NETTests/DeepSeekClientTests.cs: -------------------------------------------------------------------------------- 1 | using Microsoft.VisualStudio.TestTools.UnitTesting; 2 | using DeepSeek; 3 | using System; 4 | using System.Collections.Generic; 5 | using System.Linq; 6 | using System.Threading.Tasks; 7 | using System.IO; 8 | using DeepSeek.Classes; 9 | 10 | namespace DeepSeek.Tests 11 | { 12 | [TestClass] 13 | public class DeepSeekTests 14 | { 15 | private DeepSeekClient? _client; 16 | private bool _disposed; 17 | 18 | private static readonly string? ApiKey = Environment.GetEnvironmentVariable("DEEPSEEK_API_KEY") 19 | ?? "DEEPSEEK_API_KEY"; 20 | 21 | [TestInitialize] 22 | public void Initialize() 23 | { 24 | if (ApiKey == "DEEPSEEK_API_KEY" || string.IsNullOrEmpty(ApiKey)) 25 | { 26 | Assert.Inconclusive("API key not set"); 27 | } 28 | 29 | _client = new DeepSeekClient(ApiKey); 30 | } 31 | 32 | [TestMethod] 33 | public async Task ListModelsAsyncTest_ValidKey_ReturnsModels() 34 | { 35 | // Act 36 | var result = await _client!.ListModelsAsync(); 37 | 38 | // Assert 39 | Assert.IsNotNull(result); 40 | Assert.IsTrue(result!.Data!.Count > 0); 41 | Assert.IsNull(_client.ErrorMessage); 42 | } 43 | 44 | [TestMethod] 45 | public async Task ChatAsyncTest_ValidRequest_ReturnsResponse() 46 | { 47 | // Arrange 48 | var request = new ChatRequest 49 | { 50 | Messages = [Message.NewUserMessage("Hello! Tell me an interesting fact about space.")], 51 | Model = Models.ModelChat 52 | }; 53 | 54 | // Act 55 | var result = await _client!.ChatAsync(request); 56 | 57 | // Assert 58 | Assert.IsNotNull(result); 59 | Assert.IsFalse(string.IsNullOrEmpty(result!.Choices!.First().Message!.Content)); 60 | } 61 | 62 | [TestMethod] 63 | public async Task ChatAsyncTest_ValidReasonerRequest_ReturnsReasonerResponse() 64 | { 65 | // Arrange 66 | var request = new ChatRequest 67 | { 68 | Messages = [Message.NewUserMessage("Hello! Tell me an interesting fact about space.")], 69 | Model = Models.ModelReasoner 70 | }; 71 | 72 | // Act 73 | var result = await _client!.ChatAsync(request); 74 | 75 | // Assert 76 | Assert.IsNotNull(result); 77 | Assert.IsFalse(string.IsNullOrEmpty(result!.Choices!.First().Message!.ReasoningContent)); 78 | } 79 | 80 | [TestMethod] 81 | public async Task ChatStreamAsyncTest_ValidRequest_StreamsResponses() 82 | { 83 | // Arrange 84 | var request = new ChatRequest 85 | { 86 | Messages = [Message.NewUserMessage("Explain the theory of relativity in 3 sentences.")], 87 | Model = Models.ModelChat 88 | }; 89 | 90 | // Act 91 | var responses = new List(); 92 | 93 | var choices = await _client!.ChatStreamAsync(request, new CancellationToken()); 94 | if (choices is not null) 95 | { 96 | await foreach (var choice in choices) 97 | { 98 | responses.Add(choice.Delta?.Content ?? ""); 99 | } 100 | } 101 | 102 | // Assert 103 | Assert.IsTrue(responses.Count > 0); 104 | Assert.IsFalse(string.IsNullOrEmpty(string.Join("", responses))); 105 | } 106 | 107 | [TestMethod] 108 | [ExpectedException(typeof(ArgumentOutOfRangeException))] 109 | public void SetTimeoutTest_InvalidValue_ThrowsException() 110 | { 111 | // Act 112 | _client!.SetTimeout(-1); 113 | } 114 | 115 | 116 | [TestMethod] 117 | public async Task ErrorHandlingTest_InvalidKey_ReturnsError() 118 | { 119 | // Arrange 120 | var invalidClient = new DeepSeekClient("invalid_key"); 121 | 122 | // Act 123 | var result = await invalidClient.ListModelsAsync(); 124 | 125 | // Assert 126 | Assert.IsNull(result); 127 | Assert.IsNotNull(invalidClient.ErrorMessage); 128 | } 129 | } 130 | } -------------------------------------------------------------------------------- /LICENSE.txt: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) [year] [fullname] 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # DeepSeek.NET 2 | 3 | ![NuGet Version](https://img.shields.io/nuget/v/DeepSeek.NET) 4 | A modern .NET (C#) wrapper for the DeepSeek AI API – integrate conversational AI into your applications with ease. 5 | 6 | - **Model Discovery**: Retrieve available AI models effortlessly. 7 | - **Smart Conversations**: Execute both single-turn and streaming multi-turn dialogues. 8 | - **Streaming Support**: Real-time response handling for dynamic interactions. 9 | - **Modern .NET (C#) Integration**: Built with .NET 8 and `HttpClient` best practices. 10 | 11 | ## 📋 Prerequisites 12 | 13 | - **DeepSeek API Key**: Obtain from [DeepSeek Platform](https://platform.deepseek.com/) 14 | - **.NET 8+**: Target framework requirement 15 | 16 | ## 📦 Installation 17 | 18 | ```bash 19 | dotnet add package DeepSeek.NET 20 | ``` 21 | 22 | ## 🛠️ Quick Start 23 | 24 | ### Initialize Client 25 | 26 | ```csharp 27 | // Simple initialization 28 | var client = new DeepSeekClient("your_api_key_here"); 29 | 30 | // Or with custom HttpClient 31 | var httpClient = new HttpClient(); 32 | var factoryClient = new DeepSeekClient(httpClient, "your_api_key_here"); 33 | ``` 34 | 35 | (You can change the HttpClient Timeout with `client.setTimeout(int seconds)`) 36 | 37 | ### Discover Available Models 38 | 39 | DeepSeek offers two AI models for different use cases: 40 | 41 | - **`Models.ModelChat`**: Standard conversational AI model, ideal for chat interactions. 42 | - **`Models.ModelReasoner`**: Includes an additional reasoning phase, useful for deeper analytical responses. 43 | 44 | ```csharp 45 | var models = await client.ListModelsAsync(); 46 | if (models?.Data is null) 47 | { 48 | Console.WriteLine($"Error: {client.ErrorMsg}"); 49 | return; 50 | } 51 | 52 | foreach (var model in models.Data) 53 | { 54 | Console.WriteLine($"- {model.Id}: {model.Capabilities}"); 55 | } 56 | ``` 57 | 58 | ### Basic Chat Interaction 59 | 60 | When constructing a conversation, you can use different types of messages to define roles: 61 | 62 | - **`Message.NewSystemMessage(content)`**: Used for system instructions or context setting. 63 | - **`Message.NewAssistantMessage(content)`**: Represents a response from the AI assistant. 64 | - **`Message.NewUserMessage(content)`**: Represents a message from the user. 65 | 66 | ```csharp 67 | var chatRequest = new ChatRequest 68 | { 69 | Messages = [ 70 | Message.NewUserMessage("Explain quantum computing in 3 sentences"), 71 | Message.NewAssistantMessage("..."), 72 | Message.NewUserMessage("Now simplify it for a 5th grader") 73 | ], 74 | Model = Models.ModelChat 75 | }; 76 | 77 | var response = await client.ChatAsync(chatRequest); 78 | var responseContent = response?.Choices.First().Message.Content ?? "No response"; 79 | 80 | Console.WriteLine(responseContent); 81 | ``` 82 | 83 | ### Real-Time Streaming 84 | 85 | ```csharp 86 | var streamRequest = new ChatRequest 87 | { 88 | Messages = [ 89 | Message.NewUserMessage("Tell a 100-word sci-fi story") } 90 | ], 91 | Model = Models.ModelChat 92 | }; 93 | 94 | var stream = await client.ChatStreamAsync(streamRequest); 95 | if (stream is null) return; 96 | 97 | await foreach (var chunk in stream) 98 | { 99 | Console.Write(chunk.Delta?.Content); 100 | } 101 | ``` 102 | 103 | ### Read Reasoning Content 104 | 105 | Only in case of `Models.Reasoner`, you will have available also the Reasoning Content 106 | 107 | ```csharp 108 | var chatRequest = new ChatRequest 109 | { 110 | Messages = [ 111 | Message.NewUserMessage("Hello! Tell me an interesting fact about space.") 112 | ], 113 | Model = Models.ModelReasoner 114 | }; 115 | 116 | var response = await client.ChatAsync(chatRequest); 117 | var reasoningContent = response?.Choices.First().Message.ReasoningContent ?? String.Empty; 118 | 119 | Console.WriteLine(reasoningContent); 120 | ``` 121 | 122 | ## 🤝 Contributing 123 | 124 | We welcome contributions! Please follow our contribution guidelines when: 125 | - Reporting issues 126 | - Suggesting enhancements 127 | - Submitting pull requests 128 | 129 | ## License 130 | 131 | MIT License – See [LICENSE](LICENSE) for details. 132 | --------------------------------------------------------------------------------