Signunder 0.1.0

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. 
dotnet add package Signunder --version 0.1.0
                    


                    

                
NuGet\Install-Package Signunder -Version 0.1.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Signunder" Version="0.1.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Signunder" Version="0.1.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Signunder" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Signunder --version 0.1.0
                    


                    

                
#r "nuget: Signunder, 0.1.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Signunder@0.1.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Signunder&version=0.1.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Signunder&version=0.1.0
                    


                            Install as a Cake Tool

Signunder

The .NET client for SignUnder, which signs AI-generated images with C2PA Content Credentials under your company's own name, adds an invisible watermark and a fingerprint, and records each output so anyone can check it on your public verify page.

dotnet add package Signunder

Get an API key at signunder.com/dashboard, then:

using Signunder.Sdk;

var client = SignunderClient.FromEnvironment();   // SIGNUNDER_API_KEY

var signed = await client.SignAsync("picture.jpg");
await File.WriteAllBytesAsync("picture.signed.jpg", signed.Content);   // serve these bytes unchanged

var check = await client.VerifyAsync("picture.signed.jpg");
Console.WriteLine($"{check.ValidationState}, signed by {check.SignedBy}");

var record = await client.GetRecordAsync(signed.RecordId);

In ASP.NET Core, register it once and inject SignunderClient:

builder.Services.AddSignunderClient(o => o.ApiKey = builder.Configuration["Signunder:ApiKey"]);

JPEG, PNG and WebP are supported. Every refusal throws SignunderException with the HTTP status and the API's explanation; for a failure on SignUnder's side, Reference is the id to quote to support. The client targets .NET 8 and .NET 10 and works in trimmed and native AOT apps.

The API reference is at signunder.com/docs; the source, under Apache-2.0, is at github.com/AivaStack/signunder.

Product Compatible and additional computed target framework versions.
.NET net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last Updated
0.1.0 56 10/20/2026