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MCP server

MCP server for adding animated captions to videos.

Let Claude, Cursor or any Model Context Protocol client caption videos for you: just ask in plain language.

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Quick answer

AnimateCaptions runs a hosted MCP (Model Context Protocol) server at https://animatecaptions.com/api/mcp. Add it to Claude, Cursor or another MCP client with your API key as a bearer token, and the agent gets tools to list caption styles, create a caption job from a video, wait for it, and return the download link of the captioned MP4. It is listed on the Official MCP Registry as com.animatecaptions/mcp.

Key takeaways

  • Hosted Streamable HTTP endpoint: no install, one URL plus a free API key.
  • 9 tools, including create_caption_job, wait_for_caption_job and download_captioned_video.
  • Agents can pick any of 37 caption styles and a position from a natural-language request.
  • Published on the Official MCP Registry as com.animatecaptions/mcp.

What an MCP server is

The Model Context Protocol is an open standard that lets AI assistants call external tools. An MCP server exposes a set of tools with typed inputs; the assistant decides when to call them based on your request.

Connect it to your AI client

Add a server with type http, url https://animatecaptions.com/api/mcp and the header Authorization: Bearer ac_live_YOUR_KEY. Create the key at animatecaptions.com/developers. The same configuration works in Claude, Cursor and other clients that support remote MCP servers.

What you can ask the agent

For example: "Caption https://example.com/clip.mp4 in the Hormozi style with the captions at the bottom, then give me the download link." The agent creates the job, waits while it transcribes and renders, and returns the finished video. You can also ask which styles exist, check your remaining monthly uploads, or list recent jobs.

Tools the server provides

list_caption_styles, get_account, create_caption_job, start_caption_job, get_caption_job, wait_for_caption_job, download_captioned_video, list_caption_jobs and delete_caption_job. Every call runs under your own key and plan limits.

MCP server vs REST API

FeatureMCP serverREST API
Best forAI agents and assistantsYour own code and pipelines
How it is calledAgent picks tools from your requestHTTP requests you write
Endpoint/api/mcp/api/v1
AuthenticationSame API keySame API key
Step by step

Set up the MCP server in four steps.

  1. 1

    Create an API key

    Sign in at animatecaptions.com/developers and create a key. It is shown once, so copy it into your MCP client configuration.

  2. 2

    Add the MCP server

    Add https://animatecaptions.com/api/mcp as a remote (HTTP) MCP server with the Authorization: Bearer header set to your key.

  3. 3

    Ask for captions

    Give the agent a public link to an MP4 or MOV and describe the style and position you want, or ask it to list the styles first.

  4. 4

    Get the captioned video

    The agent waits for the job and returns a download link. The job also appears in your project list on animatecaptions.com.

Editor walkthrough

Edit and preview before you export.

Correct words, customize the style, reposition individual lines, and preview the burned-in result.

Related guides

Continue with a specific workflow.

API & MCP docsCaption APISubtitle API
Common questions

Frequently asked questions.

Is there an MCP server for adding captions to videos?

Yes. AnimateCaptions hosts one at https://animatecaptions.com/api/mcp. It is listed on the Official MCP Registry as com.animatecaptions/mcp.

Does it work with Claude and Cursor?

Yes. Any MCP client that supports remote (Streamable HTTP) servers with a custom Authorization header can use it.

Can the agent upload a video from my computer?

The agent can pass a public video URL, or ask for an upload URL and PUT the file there if it has access to the file.

How much does the API cost?

API keys are free. Jobs count against your plan's monthly uploads: the free plan includes 3 videos per month up to 2 minutes with a watermark; paid plans remove the watermark and raise the limits.

Which video formats are supported?

MP4 and MOV, up to 500 MB on the free plan and 2 GB on paid plans, sent as a public direct link or uploaded to a presigned URL.

Where are the full API docs?

At animatecaptions.com/developers, which also lists every caption style (GET /api/v1/styles needs no key) and the MCP setup for AI agents.

Sources

Add accurate animated captions to your next clip.

Upload, correct, style, position, and export in one browser workflow.

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