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How to connect AltTextLab to Claude Cowork

Connect Claude Cowork to AltTextLab MCP. Generate alt text for product images, audit website images missing alt text, and more using natural language, with authentication handled for you.

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AltTextLab is an AI service that generates accessible, SEO-aware alt text for images. It helps teams make image content easier to understand, index, and publish.

2 Tools

Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your AltTextLab account to Cowork via Composio Connect, enabling it to generate alt text for product images, audit website images missing alt text, create SEO alt text for thumbnails, and more such actions on your behalf without compromising your account security.

Also integrate AltTextLab with

ChatGPT WorkHermes

Connecting AltTextLab to Claude Cowork

1. Open Customize

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

2. Add the Composio MCP server

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

3. 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 Cowork

4. Connect your AltTextLab account

Back in Cowork, ask the agent to connect to AltTextLab or give it any AltTextLab-related task.

For example, ask Cowork to:

  • "Generate alt text for product images"
  • "Audit website images missing alt text"
  • "Create SEO alt text for thumbnails"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your AltTextLab account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like AltTextLab through MCP without you sharing account credentials directly with the agent.

What is the AltTextLab MCP server, and what's possible with it?

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

TOOLS

Supported Tools

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

Generate Alt Text

Generate accessible alt text for a publicly reachable image URL, optionally guided by language, writing style, SEO keywords, product details, and page context.

Get Account Credits

Return the connected AltTextLab account's plan, activation state, and current generation credit balance.

FRAMEWORKS

How to build AltTextLab MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use AltTextLab MCP with ChatGPT Work

Hermes logo

Hermes

Use AltTextLab MCP with Hermes

FAQ

Frequently asked questions

With a standalone AltTextLab MCP server, the agents and LLMs can only access a fixed set of AltTextLab tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from AltTextLab 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 AltTextLab tools.

Yes, absolutely. You can configure which AltTextLab 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 AltTextLab data and credentials are handled as safely as possible.

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