HyperFrames by HeyGen

Build animated slides and motion graphics from HTML, then render them to video.

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What the HyperFrames by HeyGen connector does

The HyperFrames MCP server connects HeyGen's HTML-to-video engine to Claude, ChatGPT and Grok, so a chat can build an animated slide, explainer or motion graphic from a plain-language brief and render it to a file. Anthropic's directory lists two tools, compose and render_video. The second one spends money — rendering runs on HeyGen infrastructure and draws down your account's credits.

Verified connector

Listed by Anthropic as a partner connector in its Connectors Directory.

Connection checked by Agentman on .

Anthropic states this reflects the level of review a connector received, not a security audit.

HyperFrames by HeyGen tools (2)

  • compose
  • render_video

Tool names from Anthropic's directory listing. This server requires sign-in, so we could not read tool descriptions or parameter schemas.

Limits

  • Rendering spends real money and no scope gates it. render_video draws HeyGen credits, the OAuth grant offers only identity claims, and consent therefore cannot separate composing from rendering. Rely on your client's per-call approval, and do not enable blanket auto-approval on this connector.
  • HeyGen publishes no credit cost for a HyperFrames render. Its per-minute credit table covers avatar video, translation and Video Agent only. You can confirm renders cost credits; you cannot predict what one costs from published sources.
  • A retried render can bill twice. HeyGen's own documentation says so about the underlying upload endpoint, and does not state whether the hosted connector passes an idempotency key.
  • HeyGen declines to publish a tool list. Its MCP guide says the exact tool list depends on the deployed server and the chat host. The two names here are Anthropic's, and there is no vendor enumeration to diff them against in either direction.
  • The whole path is beta. HeyGen's own notice states that availability, interface wording, features, credits and plan requirements can change.
  • The open-source repository does not include the server. 8,254 tree entries contain exactly one MCP path, the documentation page. The connector itself cannot be source-read.
  • We could not read tool schemas or safety annotations. The endpoint returned 401 to an anonymous request, so no readOnlyHint, destructiveHint or idempotentHint is reported here, and no parameter detail. The compose/render split above is our reading of two names plus HeyGen's documentation of the rendering path.
  • Output lives in HeyGen, not locally. No project folder, no Studio access, no local debugging. HeyGen recommends the local CLI path when you need those, and warns against sending private material to the connector.
  • compose authors arbitrary HTML, CSS and JavaScript from a described brief. That is the product working as designed, but it means the two-tool count understates what one of the tools accepts.

Frequently asked questions

Does the HyperFrames MCP connector cost money to use?

Yes. HeyGen's CLI reference states plainly that on hosted cloud rendering you pay per credit, and credits are HeyGen's single billing currency across every feature. Paid plans start at 1,000 credits a month for 49 US dollars. Rendering runs on HeyGen infrastructure through your connected account, so each render an agent triggers draws down that allowance.

How many tools does the HyperFrames MCP server have?

Anthropic's directory lists two, compose and render_video, and that is the only enumeration anywhere. HeyGen publishes no tool list. Its own MCP guide states that the exact tool list depends on the deployed server and the chat host, so treat two as a snapshot of one deployment rather than a fixed total.

Is the HyperFrames MCP server open source?

The renderer is; the hosted connector is not. HeyGen publishes HyperFrames under Apache 2.0 with roughly 42,000 stars, but that repository contains only the MCP documentation page — no server implementation. The endpoint at mcp.heygen.com is closed-source hosted infrastructure, so the open-source licence gives you no ability to audit what the connector actually does.

What OAuth permissions does the HyperFrames connector request?

Only identity claims, which grant no boundary at all. Both the RFC 9728 resource descriptor and HeyGen's authorization server advertised exactly openid, profile and email on 2026-08-22. No scope mentions rendering, spending or composing, so consent cannot separate drafting a composition from triggering a billed render.

Can the HyperFrames connector delete my videos?

No tool in the listing carries a delete verb, but HeyGen's own CLI has a cloud delete command that soft-deletes a render, after which fetches return 404 and the signed video URL stops working. Whether the hosted connector exposes that path is unknown, because HeyGen publishes no tool list and no OAuth scope names deletion either way.

What happens if the agent retries a render that already started?

It may bill you twice. HeyGen documents that its upload endpoint is not idempotent on its own and that a retry without an idempotency key would create a duplicate asset and bill the workspace twice. The CLI exposes an idempotency-key flag to prevent this; whether the MCP connector sets one is not documented.

Which AI chat products can connect to HyperFrames?

HeyGen documents connection steps for Claude, ChatGPT and Grok, each as a custom connector pointed at the production MCP address. All three require a HeyGen account plus access to the HyperFrames connector, and HeyGen notes that each host controls which plans and workspace roles may add custom connectors at all.

Why does HyperFrames authorization keep looping?

HeyGen's troubleshooting steps are to confirm the production MCP address, disconnect and reconnect HyperFrames, verify that your host plan and workspace permit the connector, and confirm that pop-ups and the HeyGen sign-in window are not blocked. HeyGen also warns to connect only the production server shown in its own documentation.

Sources

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