The 9router Antigravity combination is documented on both ends of the repo: Antigravity sits in 9Router’s list of 16 supported coding tools and among its OAuth providers — meaning Google’s agentic IDE can both ride the router and feed it. What the README doesn’t include is a dedicated setup walkthrough, so here’s what’s confirmed, the standard route that applies, and exactly where the documentation runs out.
Short answer
- Confirmed in the repo: Antigravity is a supported CLI tool and an OAuth provider — it appears in the project’s own description.
- No dedicated Antigravity walkthrough exists in the README — integration follows the standard OpenAI-compatible pattern (base URL
http://localhost:20128/v1+ your 9Router key). - As a provider: an Antigravity login becomes another subscription tier for the router’s fallback to squeeze.
- Treat this page’s standard-route guidance as exactly that — the documented pattern, not an Antigravity-specific official guide.
What’s actually documented for 9router Antigravity
Two facts are solid. First, Antigravity appears in 9Router’s supported-tools list alongside Claude Code, Codex, Cursor and Cline — it’s even in the repo’s one-line description: “Connect Claude Code, Codex, Cursor, Cline, Copilot, Antigravity to FREE Claude/GPT/Gemini via 40+ providers.” Second, Antigravity is listed among the OAuth providers — the logins 9Router can connect and squeeze as a subscription tier, alongside Claude Code, Codex, GitHub and Cursor.
That dual listing matters: it means the router sees Antigravity both as a consumer (the IDE pointing at the proxy) and a source (a login whose quota joins the fallback pool). For anyone already paying for or using Google’s IDE, the second half is quietly the more valuable one.
The setup route that applies (and its limits)
The README gives Antigravity no dedicated section — per the docs it’s treated as a standard OpenAI-compatible tool: base URL http://localhost:20128/v1, API key from the 9Router dashboard, routed model names in the cc/… style where supported. If you’ve wired Cursor or Cline to the router, the shape is identical — find where Antigravity accepts a custom model endpoint and give it the same two values. Get the router itself standing first via the install guide.
Honesty box: Antigravity-specific steps, screenshots and quirks are NOT in the 9Router README at the time of writing (checked 13 September 2026) — only the generic OpenAI-compatible pattern plus Antigravity’s presence in the tools and OAuth lists. Where exactly Antigravity exposes its endpoint settings, and how its own updates interact with a proxy, is between Google’s docs and your testing. Verify on a side project before trusting it with real work, and treat 9router.com’s docs as the live source of truth.
🔥 Want this set up without the guesswork? Getting every coding tool — Antigravity included — onto one routing brain is exactly the kind of thing we set up together inside the AI Profit Boardroom — 3,700+ members, four live calls a week, daily tutorials, done-for-you templates and a 30-day roadmap. Prefer 1-on-1 help? Book a free SEO strategy session and we’ll map it out for your business.
Why this pairing is worth the fiddling
Antigravity is Google’s agentic IDE — ambitious, fast-moving, and like every agentic tool, hungry. Routing it through 9Router applies the same economics that make the router worth running at all: three-tier fallback so limits degrade gracefully instead of stopping you, RTK’s documented 20–40% input compression on requests through the proxy, and live quota visibility across every connected login. And because 9Router speaks to 16 tools, your Antigravity sessions share one routing brain with Claude Code and everything else you run — one dashboard, one fallback policy, one set of savings.
The bottom line on 9router Antigravity
The 9router antigravity pairing is officially supported in the lists and unofficially documented in the details: the repo names the IDE on both the tool and provider sides, and the standard base-URL pattern is the route in. Wire it like any OpenAI-compatible tool, smoke-test before trusting it, and watch the docs — a dedicated walkthrough landing in the README is the likely next chapter for a pairing this prominent in the project’s own pitch.
FAQ: 9router antigravity
Does 9Router support Antigravity?
Yes — Antigravity appears in the repo’s supported-tools list and its one-line project description, and also among the OAuth providers.
How do I connect Antigravity to 9Router?
No dedicated walkthrough exists; the documented pattern is the standard OpenAI-compatible route — base URL http://localhost:20128/v1 plus your 9Router dashboard key, wherever Antigravity accepts a custom endpoint.
What does Antigravity-as-OAuth-provider mean?
Your Antigravity login can join 9Router’s subscription tier — its quota becomes part of the fallback pool other tools can draw on.
Is there official Antigravity setup documentation?
Not in the README at the time of writing (13 September 2026) — check 9router.com for the current state before setup.
Why route Antigravity at all?
Graceful fallback when limits hit, documented RTK token compression on proxied requests, and one shared dashboard across all 16 supported tools.
Is this pairing risky?
It’s a proxy in front of a fast-moving IDE — smoke-test on a side project, keep native settings one revert away, and expect occasional keep-up lag after big Antigravity updates.
Next step: if you want your whole IDE lineup routed through one free proxy working for you this week, join the AI Profit Boardroom for the full walkthroughs and live help — or book a free SEO strategy session and I’ll point you at the fastest path for your situation.
About Julian Goldie: SEO agency owner with 10+ years in SEO, 394K+ subscribers on YouTube, a 100% job-success score on Upwork, 75K+ members across his communities, and author of a best-selling SEO book. He runs the AI Profit Boardroom community and offers a free SEO strategy session.
Related reading
- 9Router Install: One Command To Free AI Coding
- 9Router Proxy: How One Local Endpoint Runs It All
- 9Router Claude Code Setup: Free Models In Minutes
Last updated September 2026. This is the living guide to 9router antigravity — it gets updated as the tools change.
Related Posts:
Related posts:
NotebookLM SEO Automation: Scale Content and Traffic Effortlessly
Perplexity AI Release Breaks Everything: Free Browser With AI Assistant That Organizes Tabs, Summarizes Pages & Writes Emails
Microsoft Edge Copilot: The AI Browser Update That Changes Everything
GenSpark Hubs: How to Build a 6-Figure AI Research Business in the New Search Era