AltTextLab MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with AltTextLab MCP or direct API to generate alt text, audit image accessibility, improve SEO descriptions, and prepare accessible image metadata through natural language.

AltTextLab logoAltTextLab
Api Key

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

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
AltTextLab
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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.

SETUP GUIDE

Connect AltTextLab MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["alt_text_lab"],
  mcp: true,
});
Create a session scoped to AltTextLab and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Generate accessible, SEO-aware alt text for this product image: https://example.com/images/red-running-shoe.jpg",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a AltTextLab request
SETUP GUIDE

Connect AltTextLab API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["alt_text_lab"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to AltTextLab
3

Run AltTextLab tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Generate accessible, SEO-aware alt text for this product image: https://example.com/images/red-running-shoe.jpg" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the AltTextLab tool calls through the session, and print the final answer

Why Use Composio?

AI Native AltTextLab Integration

  • Supports both AltTextLab MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable alt text generation
  • Rich coverage for generating, reviewing, and improving accessible image descriptions

Managed Auth

  • Secure API key handling without hard-coding AltTextLab credentials in your agent
  • Central place to manage, scope, and revoke AltTextLab access
  • Per user and per environment credentials for safer image workflow automation

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know which images were processed, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access AltTextLab
  • Scoped, least privilege access to AltTextLab resources
  • Full audit trail of agent actions to support accessibility review and compliance
FAQ

Frequently asked questions

Yes, AltTextLab requires you to configure your own API key. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. Learn more.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

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Managed auth, hosted MCP servers, and every AltTextLab tool your agent needs.Free to start.

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