How to connect Captions to Claude Cowork

Connect Claude Cowork to Captions MCP. Generate narrated product demo video, add styled captions to your video, and more using natural language, with authentication handled for you.

Captions logoCaptions
Api Key

Captions provides the Mirage API for generating videos, speech, and styled captions. Use it to automate polished video creation, voiceovers, and captioning from one API.

8 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 Captions account to Cowork via Composio Connect, enabling it to generate narrated product demo video, add styled captions to your video, create voiceover for training clip, and more such actions on your behalf without compromising your account security.

Also integrate Captions with

Connecting Captions 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 Captions account

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

For example, ask Cowork to:

  • "Generate narrated product demo video"
  • "Add styled captions to your video"
  • "Create voiceover for training clip"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Captions 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 Captions through MCP without you sharing account credentials directly with the agent.

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

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

TOOLS

Supported Tools

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

Add Captions

Start an asynchronous job that transcribes and renders a selected caption style onto an uploaded or existing completed video.

Download Video

Download the MP4 content of a completed video job and return an offloaded file reference.

Generate Speech

Generate WAV speech synchronously from text using a known Mirage voice ID and return an offloaded audio file reference.

Generate Video

Start an asynchronous Mirage Video 1 job that animates a portrait image using speech audio.

Get Caption Template

Retrieve one caption style by ID, including its name and preview video URL.

Get Video Status

Retrieve the current state, progress, and error details for a video generation or captioning job.

List Caption Templates

Return one page of available caption styles, including names and preview video URLs.

List Videos

Return one page of video jobs owned by the connected Mirage account, including each job's status and progress.

FRAMEWORKS

How to build Captions MCP Agent with another framework

FAQ

Frequently asked questions

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

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

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