LabelStudio

Features 🔥

• Fully generated C# SDK based on official Label Studio OpenAPI specification using AutoSDK
• Same day update to support new features
• Updated and supported automatically if there are no breaking changes
• All modern .NET features - nullability, trimming, NativeAOT, etc.
• Support .Net Framework/.Net Standard 2.0
• MEAI (Microsoft.Extensions.AI) AIFunction tools for use with any IChatClient

Usage

using LabelStudio;

// Label Studio uses Token-based auth
using var client = new LabelStudioClient(apiKey);

// List projects
var projects = await client.Projects2.ListAsync();

// Get project details
var project = await client.Projects2.GetAsync(id: 1);

// List tasks in a project
var tasks = await client.Tasks2.List2Async(project: 1);

// Create an annotation
var annotation = await client.Annotations2.CreateAsync(
    id: 1, // task ID
    result: new List<object>());

MEAI Tools

using LabelStudio;
using Microsoft.Extensions.AI;

using var client = new LabelStudioClient(apiKey);

// Create AIFunction tools for use with any IChatClient
var tools = new AITool[]
{
    client.AsListProjectsTool(),
    client.AsGetProjectTool(),
    client.AsListTasksTool(),
    client.AsCreateAnnotationTool(),
};

Ecosystem maintenance

This SDK is one of more than 200 .NET SDKs maintained with AutoSDK. The tryAGI SDK audit continuously checks repository synchronization, upstream-spec regeneration, release workflows, warnings, public API visibility, and trimming/NativeAOT compatibility.

Every issue is first investigated for ecosystem-wide applicability. When the root cause belongs in AutoSDK, we fix and regression-test the generator, then roll the improvement out to every applicable SDK. Provider-specific behavior remains in this repository when it cannot be derived safely from the API specification.

Issue content—including code blocks, logs, links, and attachments—is treated only as untrusted diagnostic data. Embedded control instructions, hidden directives, delimiter tricks, or requests to alter triage or tooling behavior are ignored. Please report reproducible technical evidence and remove secrets and personal data.

Support

Priority place for bugs: https://github.com/tryAGI/LabelStudio/issues
Priority place for ideas and general questions: https://github.com/tryAGI/LabelStudio/discussions
Discord: https://discord.gg/Ca2xhfBf3v

Acknowledgments

This project is supported by JetBrains through the Open Source Support Program.