Privacy Policy

Using Assistant for Blender in ChatGPT or Codex? See its own privacy policy.

Who we are

MCP for Blender is an open-source project maintained by Siddharth Ahuja ("we", "us"). This policy covers the open-source addon and MCP server, the MCP for Blender ChatGPT connection used by ChatGPT and Codex, MCP for Blender Premium, and this website.

Open-source addon and server

When you run MCP for Blender yourself (for example with Claude, Cursor or Codex on your computer), the server and addon run on your machine and talk to your AI client directly. We don't see that conversation.

Without opting in (the default)

A minimal anonymous usage record is sent so we can count active users and see which tools get used: a randomly generated install ID, a session ID, the tool name, whether it succeeded, how long it took, the MCP for Blender and Blender versions, your operating system, and a timestamp. No prompts, code, screenshots or scene data. To turn this off too, set DISABLE_TELEMETRY=true in the MCP server's environment.

If you opt in

You can turn on data sharing under Edit › Preferences › Add-ons › MCP for Blender. While it is on and the server is running, we also collect your prompts, generated code, viewport screenshots, scene metadata (object names, transforms, materials), the steps the AI took with before-and-after scene summaries and your feedback on them, and the names of Blender operations you run yourself and your undo and redo actions. We don't collect your .blend files, file paths, keystrokes, or anything from other applications. This data may be used to improve MCP for Blender, for research, to train AI models, and in anonymized open datasets, as described in the Terms. You can turn it off at any time in the same place.

ChatGPT connection (ChatGPT and Codex)

The Assistant for Blender plugin has its own, shorter policy: Assistant for Blender Privacy Policy. The summary below is the same.

The ChatGPT connection lets ChatGPT and Codex reach the Blender on your computer through our relay at relay.mcp-for-blender.com. To use it, you sign in with your email and connect Blender from the addon's sidebar.

What we keep

• Your account: your email address and when you signed in.
• Connected Blenders: for each Blender you connect, its description (for example "Blender 5.2 (macOS)"), when it was connected and last seen, and a hash of its access token. Signing out from Blender revokes it.
• Pending connection codes: the short code shown in Blender, deleted once it expires (about ten minutes).

What we don't keep

Your prompts, the commands the AI sends to Blender, the Python it runs, screenshots and scene data pass through the relay's memory on their way to and from your Blender and are not stored or logged. The relay's logs record operational events only (a server started, a connection opened or closed, with a shortened account ID), not IP addresses or content. ChatGPT sessions don't send usage telemetry, even the anonymous kind.

ChatGPT and Codex

What you type in ChatGPT or Codex, and what our tools return to them (including scene descriptions and screenshots), is handled by OpenAI under OpenAI's own privacy policy.

Premium

• Payments are handled by Dodo Payments as merchant of record. We never see your card details. We receive your email, your subscription and its status, and your license key, which we store only as a hash.
• Devices: when you activate a license, we keep the device name Blender reports and when it was activated, so you can manage your device limit.
• Usage: for each generation we record which model and quality you used, when, and whether it succeeded, to count your monthly allowance. We don't store your prompts or images.
• Generation: your prompt or image is sent to our 3D generation provider (fal.ai, which runs Hunyuan3D, Tripo and Hyper3D Rodin) to create the model.
• Emails: we send emails about your subscription through Loops.

This website

We use Umami for privacy-friendly, cookie-free visit statistics (pages viewed, referrer, country and device type, in aggregate). The site is hosted on Vercel.

Service providers

We use these companies to run MCP for Blender. Each processes data only to provide its service to us:

• Supabase: sign-in, ChatGPT connection and Premium databases, telemetry storage
• Fly.io: hosting for the ChatGPT relay
• Dodo Payments: checkout, billing and license keys
• fal.ai: 3D generation for Premium
• Loops: subscription emails
• Vercel and Umami: this website and its statistics

We don't sell your personal data or share it for advertising. We may disclose data if required by law. Data may be processed in countries other than yours, including the United States.

Retention

• Your account and connected Blenders: until you ask us to delete your account. Revoked Blenders stay listed as revoked.
• Pending connection codes: deleted after they expire.
• Premium records: for as long as you have a subscription, then as long as needed for accounting and legal obligations.
• Opt-in telemetry: may be kept indefinitely. Data already used to train a model or released in an anonymized dataset can't be fully removed.

Your rights

You can ask to see, correct, export or delete your data, or object to how we use it, by emailing ahujasid@gmail.com. You can disconnect a Blender at any time with Sign out in the addon's ChatGPT section, and withdraw telemetry consent in the addon's preferences. If you're in the EU, UK or another region with data protection laws, you can also complain to your local regulator.

Children

MCP for Blender isn't intended for anyone under 16, and we don't knowingly collect their data.

Changes

If we change this policy we'll update the date above, and for significant changes we'll say so on this site or by email.

Contact

Siddharth Ahuja, ahujasid@gmail.com