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How to connect Scale ai to Claude

Connect Claude Web, Desktop and Cowork to Scale ai MCP. Create image labeling task for dataset 'road-signs', list completed annotation tasks for project, and more using natural language, with authentication handled for you.

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Scale ai provides machine learning data labeling and annotation services. It enables teams to train AI models with high-quality, human-labeled data at scale.

41 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Scale ai account to Claude via Composio Connect, enabling it to create image labeling task for dataset 'road-signs', list completed annotation tasks for project, fetch results of data labeling job, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Scale ai with

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Connecting Scale ai to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Scale ai account

Back in Claude, ask it to connect to Scale ai or give it any Scale ai-related task.

For example, ask Claude to:

  • "Create image labeling task for dataset 'road-signs'"
  • "List completed annotation tasks for project"
  • "Fetch results of data labeling job"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Scale ai account is ready to use.

What is the Scale ai Claude Connector, and what's possible with it?

The Scale ai MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Scale ai account. It provides structured and secure access so your agent can perform Scale ai operations on your behalf.

Troubleshooting

1. Why does Claude not use the Composio connector for Scale ai?

The connector can show as connected, but Claude must use it in each Scale ai conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Scale ai again.

2. Why does Claude show an MCP server error before Scale ai connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Scale ai.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Scale ai.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Scale ai authorization link not work?

The Composio connector is one server. Your Scale ai account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Scale ai connection.
  • Composio creates a fresh Scale ai authorization link.
  • Open that link in your browser and finish the Scale ai sign-in.

4. Why do Scale ai actions fail after they worked before?

The Scale ai connection can expire or lose permission.

  • Ask Claude to inspect the Scale ai connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Scale ai account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Scale ai.
  • If the action still fails with a permission error, check that the connected account has that permission in Scale ai itself.

5. How do I switch to a different Scale ai account?

Claude can manage the Scale ai connection for you.

  • Ask Claude to disconnect or delete the current Scale ai account.
  • Ask Claude to connect Scale ai again.
  • Open the new Composio authorization link for Scale ai.
  • Sign in with the other Scale ai account in the browser.
  • After the account connects, ask Claude to retry the Scale ai task.

6. Why is my Scale ai connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Scale ai connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Scale ai tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Scale ai.
TOOLS

Supported Tools

Every Scale ai action and event your agent gets out of the box.

Add Studio Assignments

Tool to add project assignments to team members in Scale AI Studio.

Add Task Tags

Tool to add tags to an existing task.

Create Batch

Tool to create a new batch within a project.

Create Document Transcription Task

Tool to create a document transcription task where workers transcribe and annotate information from single or multi-page documents.

Create Image Annotation Task

Tool to create an image annotation task where annotators label images with vector geometric shapes (box, polygon, line, point, cuboid, ellipse).

Create Lidar Annotation Task

Tool to create a lidar annotation task where annotators mark objects with 3D cuboids in 3D space.

Create LiDAR Segmentation Task

Tool to create a LiDAR segmentation task where annotators assign semantic class labels to individual LiDAR points.

Create Named Entity Recognition Task

Tool to create a named entity recognition task for labelers to highlight text entity mentions.

Create Segmentation Annotation Task

Tool to create a segmentation task where annotators classify pixels in an image according to provided labels.

Create Text Collection Task

Tool to create a textcollection task for collecting information from attachments and/or web sources.

Create Video Annotation Task

Tool to create a video annotation task where annotators draw geometric shapes around specified objects across video frames.

Create Video Playback Annotation Task

Tool to create a video playback annotation task where annotators draw shapes around specified objects in video files.

Delete Task Tags

Tool to remove specified tags from a Scale AI task.

Delete Task Unique ID

Tool to remove the unique identifier from a task.

Finalize Batch

Tool to finalize a batch so its tasks can be worked on.

Get Assets

Tool to retrieve file assets with filtering capabilities by project and metadata.

Get Batch

Tool to retrieve the details of a batch with the specified name.

Get Batch Status

Tool to retrieve the current status of a batch and task completion counts.

Get Fixless Audits

Tool to retrieve fixless audits by task ID or audit ID.

Get Project

Tool to retrieve details about a specific Scale AI project using its unique identifier.

Get Quality Labelers

Tool to retrieve training attempts matching provided filter parameters.

Get Studio Assignments

Tool to retrieve current project assignments of all active team users in Scale AI Studio.

Get Studio Batches

Tool to retrieve basic information about all pending batches in Studio.

Get Task

Tool to retrieve detailed information about a specific task in Scale AI.

Get Teams

Tool to retrieve basic information about all team members associated with the account.

Get Task by ID

Tool to retrieve detailed information about a specific task using its task ID.

Get Secure Task Response URL

Tool to retrieve secure authenticated task response data.

Import File

Tool to import files from an external URL endpoint into Scale's system rather than uploading directly from local storage.

Invite Team Member

Tool to invite users by email to team with specified role.

List Batches

Tool to retrieve all batches in descending order by creation date.

List Projects

Tool to retrieve information for all projects in the Scale AI account with optional archived filtering.

List Tasks

Tool to retrieve a paginated list of tasks in descending order by creation time.

Re-send Task Callback

Tool to re-send a callback for a completed or errored task to the callback_url.

Remove Studio Assignments

Tool to unassign projects from specified team members in Scale AI Studio.

Reset Batch Priorities

Tool to restore batch priority order to default order (calibration batches first, then sorted by creation date).

Set Batch Priorities

Tool to modify batch priority order in Scale AI Studio.

Set Project Ontology

Tool to set ontologies on a Scale AI project.

Set Project Parameters

Tool to set default parameters for tasks created under a project.

Set Task Metadata

Tool to set key-value metadata on an existing Scale AI task.

Update Task Unique ID

Tool to update or assign a unique identifier to a task.

Upload File

Tool to upload a local file to Scale's servers with a maximum size limit of 80 MB per file.

FRAMEWORKS

How to build Scale ai MCP Agent with another framework

Claude Code logo

Claude Code

Use Scale ai MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Scale ai MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Scale ai MCP with Claude Agent SDK

Codex logo

Codex

Use Scale ai MCP with Codex

OpenClaw logo

OpenClaw

Use Scale ai MCP with OpenClaw

Hermes logo

Hermes

Use Scale ai MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Scale ai MCP with Atomic Agent

Google ADK logo

Google ADK

Use Scale ai MCP with Google ADK

LangChain logo

LangChain

Use Scale ai MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Scale ai MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Scale ai MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Scale ai MCP with LlamaIndex

CrewAI logo

CrewAI

Use Scale ai MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Scale ai MCP with Pydantic AI

AutoGen logo

AutoGen

Use Scale ai MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Scale ai MCP server, the agents and LLMs can only access a fixed set of Scale ai tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Scale ai and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Scale ai tools.

Yes, absolutely. You can configure which Scale ai scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Scale ai data and credentials are handled as safely as possible.

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