n8n-nodes-antigravity

Community node for calling Antigravity Cloud Code (Gemini) with optional Google Grounding search.

Features

- Message Gemini models through Antigravity Cloud Code
- List available models in your Antigravity project
- Optional Google Grounding web search with citations
- Simplified or full outputs with token usage

Installation

Community Nodes UI (recommended): In n8n go to Settings → Community Nodes, click Install, and enter n8n-nodes-antigravity.

Manual install (self-hosted): From your n8n user folder (usually ~/.n8n) run:

``bash
npm install n8n-nodes-antigravity
`

Restart n8n after installation. For Docker, mount your custom extensions folder or set N8N_CUSTOM_EXTENSIONS to the folder that contains this package.

Credentials

Create an Antigravity OAuth2 API credential in n8n and authorize with your Google account. The credential uses a preconfigured Google OAuth client and requests offline access.

Project selection is automatic.

Usage

Resource Text provides the Message a Model operation.

Resource Image provides the Generate Image operation.

Resource Model provides the List Models operation.

Key parameters for Message a Model:

- Model (Gemini models only)
- Messages (role + prompt)
- Built-in Tools > Google Search to enable Google Grounding
- Options for system message, max tokens, temperature, top P, top K, and stop sequences
- Options > Response JSON Schema (JSON) to constrain the model output to a JSON shape
- Options > Response Schema Builder to design a simple schema via fields
- Simplify Output and Output Content as JSON
- Endpoint to choose Auto, Prod, or Daily

Key parameters for Generate Image:

- Uses fixed model gemini-3-pro-image (no model picker)
- Prompt
- Image Size (1K or 2K, default 1K)
- Aspect Ratio (1:1, 3:4, 4:3, 9:16, 16:9, default 1:1)
- Person Generation (dont_allow, allow_adult, allow_all; default allow_adult)

Generate Image returns the regular JSON response and binary images (image for one image, or image_1, image_2, ... for multiple images). If the model response contains no image blocks, the node fails with a clear error.

Web Search

When Google Search is enabled, the node uses Google Grounding via Antigravity. The response includes searchQueries, sources (title + URL), and urlsRetrieved. Google Grounding cannot be combined with function declarations, so search runs as a separate call.

Output

Full output includes text, model, usage, raw, stopReason, and content (if present). When Simplify Output is enabled, the node returns only text, or text plus content when Output Content as JSON is enabled.

Development

`bash
npm install
npm run build
npm run dev
``

License

MIT