Hello Google Antigravity Team,

Google Antigravity
1

Hello Google Antigravity Team,

I use Antigravity CLI on a private Ubuntu VPS, authenticated through my personal Google AI Plus account using Google OAuth.

I have developed a private MCP server that invokes the official agy --print command. The MCP server is accessible only to my authenticated Manus AI connector and is not offered publicly or commercially.

I understand that Section 6 of the Antigravity Additional Terms restricts access through third-party tools and services.

Could you please clarify whether this specific integration is permitted?

If it is not permitted, is there an officially supported OAuth-based integration, SDK, or licensing option that would allow a private external AI agent to invoke Antigravity using my existing subscription quota, without a separately billed API?

I would appreciate confirmation of the applicable terms and any supported alternatives.

Thank you.

2

Hi @Amy3,

Thank you for reaching out to confirm before running this setup. Here is how Section 6 of the Google Antigravity Additional Terms of Service and our FAQ apply to your architecture:

  • Is exposing agy --print on a VPS via an MCP server to an external AI service (Manus AI) permitted?

    • No. Connecting an external third-party AI service (such as Manus AI) over the network to a VPS-hosted MCP server that invokes agy --print under your personal Google AI Plus OAuth login is not permitted under Section 6 of the Additional Terms (“Using third party software, tools, or services to access the Service… is a material breach of this Agreement”).
    • While agy -p (--print) is supported for your own direct local scripting and terminal automation on your machine, exposing an OAuth-authenticated agy session on a remote VPS as a backend tool for an external third-party cloud agent service acts as an unauthorized third-party service bridge and can trigger automated account suspension protections.

  • Is there an OAuth or subscription-based option for external AI services without using an API key?

    • No. Personal Google AI subscription quotas (Starter / Google AI Plus / Pro / Ultra via Google OAuth) are licensed exclusively for direct use within official Antigravity clients and cannot be used to power external third-party cloud agents or remote MCP connectors. There is no OAuth-based licensing tier that shares consumer subscription quota with external third-party agent platforms.

  • Supported Alternatives for External Agents & MCP Servers

    • If you want an external AI agent (like Manus AI) or a custom remote MCP server to call Gemini or Antigravity programmatically:
      • Google AI Studio API Key (GEMINI_API_KEY) — Includes a Free Tier: Generate an API key in Google AI Studio. Note that Google AI Studio provides a free-of-charge API tier (with daily request limits for Gemini models) in addition to pay-as-you-go billing, so you can connect your private MCP server using GEMINI_API_KEY without incurring charges for light personal usage.
      • Google Antigravity Python SDK: For programmatic agent execution using an API key (GEMINI_API_KEY) or Vertex AI credentials, use the official Google Antigravity Python SDK (pip install google-antigravity).