Connect Nucleus to Gemini

Google has no single MCP submission form. Three surfaces exist for connecting Nucleus to Google AI tools.

Option 1: Gemini Enterprise (customer-initiated)

Any Gemini Enterprise customer can connect a remote MCP server via Streamable HTTP. No partner program needed.

Nucleus endpoint: https://relay.nucleusos.dev/mcp-readonly (read-only, no auth) or https://relay.nucleusos.dev/mcp (full, OAuth).

1. Open Gemini Enterprise settings → Agent Gallery → Custom MCP servers
2. Add server URL: https://relay.nucleusos.dev/mcp-readonly
3. Approve the connection — Gemini Enterprise validates the endpoint

Gemini Enterprise only accepts Streamable HTTP (not SSE). Nucleus uses Streamable HTTP by default.

Option 2: Antigravity IDE / CLI

Antigravity is Google's AI-native editor. Edit ~/.gemini/config/mcp_config.json:

{
  "mcpServers": {
    "nucleus": {
      "serverUrl": "https://relay.nucleusos.dev/mcp-readonly"
    }
  }
}

For local stdio server:

{
  "mcpServers": {
    "nucleus": {
      "command": "python3",
      "args": ["-m", "mcp_server_nucleus"],
      "env": { "NUCLEAR_BRAIN_PATH": "/path/to/.brain" }
    }
  }
}

Option 3: Gemini Spark (consumer)

Partnership-only. No self-serve form. Requires a Google partnerships contact.

Which path?

• Enterprise team: Gemini Enterprise custom MCP — admin configures it
• Individual developer: Antigravity IDE — works in 30 seconds
• Consumer Gemini: Not available without a Google deal

Support: hello@nucleusos.dev · GitHub