Akismet.Net

Complete and full-featured Akismet client for .NET

Existing libraries don't allow for all of the possible options available in the Akismet API and the source code is not public. This library is meant to fix that.

It is also multi-targeted to support as many applications as possible.

Meant to be a drop-in replacement for the leading Akismet library with minimal changes so the class names are the same. However some properties have been removed because of redundancy.

Example usage:

.NET Framework

var model = new ContactModel();
string ip = Request.Headers["CF-Connecting-IP"] ?? Request.UserHostAddress;
if (String.IsNullOrWhiteSpace(ip))
    ip = Request.ServerVariables["REMOTE_HOST"];
AkismetClient akismet = new AkismetClient("apikeyhere", "Application Name");
AkismetComment comment = new AkismetComment
{
    BlogUrl = "https://www.adamh.us",
    CommentAuthor = model.Name,
    CommentAuthorEmail = model.EmailAddress,
    CommentAuthorUrl = "http://www.spamwebsite.com",
    Referrer = Request.UrlReferrer.ToString(),
    UserAgent = Request.UserAgent,
    UserIp = ip,
    CommentContent = model.Message,
    CommentType = AkismentCommentType.ContactForm, // multiple defined values, or use new AkismetCommentType("new-comment-type") for a custom option
    Permalink = "https://www.adamh.us/contact",
    IsTest = "false",
    BlogCharset = "UTF-8",
    BlogLanguage = "en-US",
    CommentDate = DateTime.UtcNow.ToString("O"), // ISO-8601 format
    CommentPostModified = DateTime.UtcNow.ToString("O"), // ISO-8601 format
    UserRole = "administrator",
    RecheckReason = "edit",
    HoneypotFieldName = "honeypot",
    HoneypotFieldValue = "blah"
};

var akismetResult = await akismet.CheckAsync(comment);
bool isSpam = akismetResult.SpamStatus == SpamStatus.Spam; // Options: Ham, Spam, Unspecified (in the case of an error)

// "invalid" and/or combination of X-akismet-alert-code and X-akismet-alert-msg header values
foreach (string err in akismetResult.Errors)
    Console.WriteLine(err);
    
// Other properties:
//    - ProTip (X-akismet-pro-tip header value, if present)
//    - DebugHelp (X-akismet-debug-help header value, if present)

.NET Core/.NET 5+ Usage Modifications

Program.cs / Startup.cs

builder.Services.AddAkismet(
    configuration.ApiKey,
    configuration.AkismetApplicationName);

Service Class / Controller

public class ContactFormController(AkismetClient akismetClient)

string ip = Request.Headers["CF-Connecting-IP"].ToString() ?? _contextAccessor.HttpContext?.Connection.RemoteIpAddress?.ToString() ?? "";
if (String.IsNullOrWhiteSpace(ip))
    ip = _contextAccessor.HttpContext?.GetServerVariable("REMOTE_HOST") ?? "";
AkismetComment comment = new AkismetComment
{
    // ... other properties set as above
    UserAgent = Request.Headers[HeaderNames.UserAgent],
    Referrer = Request.Headers[HeaderNames.Referer]
};
var akismetResult = await akismetClient.CheckAsync(comment)

Notes

If HoneypotFieldName and HoneypotFieldValue are supplied then the library will add these two values to the request:

honeypot_field_name=honeypot&honeypot=blah

⚠️Breaking Changes

Version 4.0 has a breaking change:

• Dropped RestClient in favor of HttpClient directly
• .NET Core/.NET 5+ now utilize dependency injection