BingChat

.NET API wrapper for Microsoft's new AI-powered Bing Chat.

Warning OUT OF DATE
Currently, the implementation is out of sync with the recent API changes which lead to frequent errors and trigger captcha. It is planned to investigate this and align the implementation with official API clients (iOS app and Browser) to reduce these issues or completely mitigate them if such possibility exists.

Warning This library is unofficial and heavily depends on reverse-engineering. Use at your own risk.

• BingChat
  • Quick Start
  • Interactive Command Line Tool
  • Roadmap
  • Q&A
  • Contributors
  • License

Quick Start

Note Since BingChat's public release, a valid cookie is no longer required. You can use this package without any authentication.

Install this package via NuGet package manager or dotnet CLI:

dotnet add package --prerelease BingChat

Then,

using BingChat;

// Construct the chat client
var client = new BingChatClient(new BingChatClientOptions
{
    // Tone used for conversation
    Tone = BingChatTone.Balanced,
});

var message = "Do you like cats?";
var answer = await client.AskAsync(message);

Console.WriteLine($"Answer: {answer}");

The code above sends a message to the chat AI, and gets the answer from it.

This method creates a one-shot conversation and discards it when completed. If you want to continue chatting in the same context (just like the behavior in the web interface), you need to create a shared conversation:

// Create a conversation, so we can continue chatting in the same context.
var conversation = await client.CreateConversation();

var firstMessage = "Do you like cats?";
var answer = await conversation.AskAsync(firstMessage);
Console.WriteLine($"First answer: {answer}");

await Task.Delay(TimeSpan.FromSeconds(5));

var secondMessage = "What did I just say?";
answer = await conversation.AskAsync(secondMessage);
Console.WriteLine($"Second answer: {answer}");

Interactive Command Line Tool

We also developed an amazing command line tool for you! See the preview below:

You can install the CLI by executing the following command simply:

dotnet tool install -g --prerelease dotnet-bingchat

Then start the CLI:

dotnet bingchat

Roadmap

• Implement a command line tool to interact with Bing Chat
• Provide a way to get the full result, like adaptive cards
• Add ability to set timeout
• Publish CLI as dotnet tool
• Validate that connectivity issues are gone after switching to SignalR
• Investigate BingChat iOS app and Browser changes to mitigate overzelous captcha requests
• Investigate API spec changes to bring implementation in line with changed API contracts
• Research OptionSet specifics, analyze whether switching to harmonyv3 enables the older model which has better performance
• Expose rich response object via .SendAsync(..) to allow detailed access and control over the conversation state

Q&A

Set your own cookie

You can set your own cookie to interact with BingChat server, instead of generating a random one.

To get it, you can go to www.bing.com, log in an account which has access, and then open the Developer Tools (F12) > Application Tab > Storage > Cookies, find the cookie named _U, and copy its value. Then pass it to the BingChatClientOptions' constructor.

UnauthorizedRequest Exception

Solution

There are multiple reasons. You may follow these steps to handle the problem.

1. Refresh the webpage, confirm that the '_U' value is up to date and copied correctly, and retry.

2. If you are using a proxy (VPN), try setting the global proxy, and retry. The code is as follows:

   HttpClient.DefaultProxy = new WebProxy("127.0.0.1:8807"); //Your proxy address and port

3. Find another cookie named 'KievRPSSecAuth', set its value, and retry. The code is as follows:

   var client = new BingChatClient(new BingChatClientOptions {
       // The "_U" cookie's value
       CookieU = strU,
       // The "KievRPSSecAuth" cookie's value
       CookieKievRPSSecAuth = strKievRPSSecAuth,
   });

4. Open the browser menu > Extensions. Search for 'Cookie Editor' and install it. Go to Bing Chat webpage and export all cookies to to a local file in JSON format. Set file path value as follows (The "_U" and "KievRPSSecAuth" value are not needed at this time):

   var client = new BingChatClient(new BingChatClientOptions {
       // The exported cookie file path
       CookieFilePath = strFilePath,
   });

Contributors

Thanks to these contributors for developing or improving this library:

If you have any idea on this project, feel free to open a PR and share with us :D

License

This project is licensed under MIT License. We ❤ open source!