How to Connect Antigravity to Revit, Rhino and Archicad (MCP)
Short answer: To connect Antigravity (Google's agentic IDE) to your CAD and BIM models, install the Archi Automate ("AI for AEC") Hub, open its LLMs page, and click Connect next to Antigravity. The Hub writes the Model Context Protocol (MCP) configuration into Antigravity for you, backing up your existing config and merging non-destructively. Restart Antigravity, and it can read and (when you allow it) edit live projects in Autodesk® Revit® 2025–2027, Rhino 8 (McNeel), Archicad 29 (Graphisoft), and vendor-neutral openBIM (IFC, IDS, BCF). The whole setup takes about a minute, and the 14-day trial needs no key.
Antigravity is built around Google's Gemini models, so once it is bridged to your model it can answer questions and compose real modeling operations in plain language. Below is exactly how the connection works, how to set it up in three steps, and what you can ask once Revit, Rhino, Archicad, and IFC are on the other end of the conversation.
How Antigravity talks to your model
Antigravity does not speak to Revit or Rhino directly. It speaks MCP, an open standard for connecting AI clients to external tools, and the Archi Automate Hub is the bridge that turns those MCP requests into governed operations inside each design application. The chain looks like this: Antigravity → MCP → Archi Automate Hub → your host (Revit / Rhino / Archicad / openBIM).
For Revit and Rhino, the Hub composes governed operations at runtime across the host API, so the AI is not limited to a fixed menu of commands; in Rhino, every write is wrapped in a managed Undo. For Archicad, a first-party add-on exposes a curated command set (read, plus create, move, and delete Wall, Column, Slab, and Object elements). For openBIM, a headless connector works on IFC files with no CAD application or license required at all. Every request, regardless of host, passes through the Hub's guardrails before anything touches your model.
Before you start
- Windows 10 or 11, x64. One installer covers all four hosts.
- Antigravity installed and signed in, on a capable Gemini tier (more on model choice below).
- Whichever host you want to drive: Revit 2025–2027, Rhino 8, or Archicad 29 open with a project loaded. For IFC work you need no CAD app at all.
- The Hub running. Check its Bridges page: a green status dot means the host is detected and reachable.
Connect Antigravity in three steps
The Hub dashboard has four pages: Bridges (host status dots), LLMs (one-click Connect), Guardrails, and Help. Connecting Antigravity lives entirely on the LLMs page.
Step 1 — Open the LLMs page. It lists every supported client with a Connect button. Antigravity sits alongside Claude (Desktop and Code), OpenAI Codex, Cursor, VS Code (Copilot agent), Windsurf, Gemini CLI, and Cline.
Step 2 — Click Connect next to Antigravity. The Hub writes the MCP server configuration straight into Antigravity. It backs up your current config first and merges the new entry non-destructively, so any MCP servers you already use stay intact. There is no JSON to hand-edit and no file paths to hunt down.
Step 3 — Restart Antigravity and run a read-only prompt. Antigravity loads MCP servers at startup, so restart it after connecting. Then, with the Hub left on its default Read only guardrail, try something harmless first — for example, in a Revit project, "How many rooms are on Level 2?" A correct answer confirms the whole chain is live before you grant any write access.
What you can ask, per host
Revit (Autodesk® Revit® 2025–2027). Lead with reads and audits. Ask "How many rooms are on Level 2?" to sanity-check the connection, then move to model-quality work like "Audit doors for a fire-rating parameter." Because the Hub composes operations across the Revit API at runtime, Antigravity can interrogate parameters, schedules, and relationships rather than being boxed into a fixed command list.
Rhino (Rhino 8, McNeel). Rhino shines for geometry questions. Try "Collect closed Breps on a layer and report volume." Antigravity composes the operation, and any write it performs is wrapped in a managed Undo, so you can step back in one move if the result is not what you wanted.
Archicad (Archicad 29, Graphisoft). The first-party add-on exposes a curated set of element operations. Reads work under the default guardrail; to create, move, or delete a Wall, Column, Slab, or Object you must switch the Hub to Allow changes. A natural first authoring prompt is "Create a wall between two points." Note that Archicad uses honest, explicit commands — there is no dynamic code generation and no dry-run preview for Archicad, so its writes always require Allow-changes.
openBIM (IFC · IDS · BCF). The headless connector needs no CAD application. Ask Antigravity to "Open and validate this IFC against my IDS," and from there you can federate models, run clash detection, take off quantities, estimate embodied carbon, capture snapshots, and author BCF issues. Model edits can be previewed first; writing files to disk needs Allow-changes.
Working across programs in one conversation
Because every host connects through the same Hub, Antigravity can move between them in a single thread. You might audit door fire-ratings in Revit, ask Rhino for the volume of a massing study, then validate a federated IFC against your IDS — all without leaving the conversation or re-authenticating. The Hub keeps each host's rules separate: Revit and Rhino get runtime-composed operations, Archicad stays on its curated command set, and openBIM runs headless, but you experience it as one assistant.
Safety and guardrails
Control sits with you, not the model. The Hub's Guardrails page offers three modes: Read only (the default — Antigravity can look but not touch), Preview changes (a dry-run that shows what would happen, available for Revit, Rhino, and openBIM model edits, but not for Archicad or file writes), and Allow changes (writes proceed). Every operation is screened before it runs, deletes can be blocked outright, sessions are audited, and the Hub never auto-saves your files. A sensible rhythm is to explore in Read only, sanity-check intent in Preview where it is supported, then switch to Allow changes only for the specific edit you want.
Other clients and hosts
Antigravity is one of eight one-click clients, and any MCP client works with the Hub. If you also use other tools, the setup is identical:
For host-specific deep dives, see MCP for Revit, MCP for Rhino, and MCP for IFC / openBIM.
Try it
The full Archi Automate trial runs for 14 days with no key required, so you can connect Antigravity and put Revit, Rhino, Archicad, and IFC through their paces today. Start at https://goto.archi/ai-for-aec.
