Antigravity SEO: Your Search Console Inside Google's Agent IDE

Antigravity is built to hand work to several agents in parallel. With SEOmatic connected, one agent can read the search data while others fix titles, templates and schema in your code.

An example on the Acme Plumbing demo site. You ask Google Antigravity:

“Plan this sprint's SEO work: which three pages should we fix first, and why?”

Google Antigravity calls SEOmatic:

• seomatic gsc_insights: striking distance, Sep 14 to Oct 11 (28 days)
• seomatic gsc_indexing: /emergency-plumber
• read src/routes/**/+page.svelte

Google Antigravity answers:

Three pages, in this order, Sep 14 to Oct 11 (28 days):

1. /emergency-plumber is not indexed. Google reports “Excluded by noindex tag”, and the tag comes from a shared layout file. Fixing it is one line.
2. /water-heater-repair sits at position 8.4 with 3,120 impressions and 41 clicks. The title skips “repair” and “same day”, which most of its searches include.
3. /drain-cleaning-cost gets 2,240 impressions at position 11.2 but never shows a price, while the top queries ask “how much”.

I can give each fix to its own agent and show you one diff per page. Nothing goes live until you merge and deploy.

Also try:

• “Audit the site before I deploy”
• “Which pages has Google not indexed, and why?”
• “Do AI answers cite our service pages?”
• “Compare clicks this month with last month”

Most agents sign in to SEOmatic with OAuth: a browser window, one click, done. Antigravity has an open upstream bug with that flow for remote MCP servers (issue 25 on the Antigravity CLI repo). Each launch registers a new client and the sign-in page never opens, so the tools never load.

An API key sidesteps it. Antigravity sends the key on every request, so there is no sign-in step to fail. The key belongs to one SEOmatic workspace, you can create one in a few seconds, and you can delete it in SEOmatic at any time. Once Google fixes OAuth, you can drop the headers block and sign in instead.

If your SEOmatic setup lived in Gemini CLI on a personal Google account, it stopped working on June 18, 2026. Moving it takes a minute:

1. Install Antigravity or agy and sign in with the same Google account.
2. Add SEOmatic with the config on this page. Antigravity uses serverUrl, so an old httpUrl entry will not load as is.
3. Ask the same questions you asked before. SEOmatic's tools and your data are the same.

Workspace accounts and paid Cloud keys can keep Gemini CLI: see Gemini SEO.

Ask these in the Antigravity agent panel or in agy, from your site's repo:

• “Plan this sprint's SEO work: which three pages should we fix first?”
• “List the pages Google has not indexed and find the cause in this repo.”
• “Which pages rank on page two? Give each one its own agent and a fix.”
• “Audit the site before I deploy and fix anything that would hurt rankings.”
• “My organic clicks fell this month. Which pages lost them, and did a recent commit cause it?”
• “Which questions do AI assistants answer without citing us?”

• Search Console performance and insights: clicks, impressions, CTR and position, striking-distance queries, cannibalization and period comparisons, with exact date ranges.
• Indexing checks: whether Google indexed a URL, and why not.
• Site audit and page scores: up to 30 pages per crawl, or a 0 to 100 score for one URL.
• AI visibility and citations: where ChatGPT, Claude and Google AI Overviews mention or cite you.
• Keyword and backlink research on paid plans, with one free keyword preview.
• Tasks and campaigns on paid plans: fixes for CMS sites, staged for your approval.

Every tool, with its parameters and cost, is in the SEO MCP server reference.

1. You ask Antigravity a question about your site, in the IDE, the desktop app or agy.
2. An agent calls the SEOmatic tools it needs, sending your API key with each call.
3. SEOmatic returns your real Search Console data and its own analysis, with exact date ranges.
4. Antigravity reads the matching files, explains the cause and edits the code, often with one agent per page. You review each diff.
5. For CMS sites on a paid plan, Antigravity stages the fix in SEOmatic instead. You approve it, and SEOmatic applies it with a rollback point.

About two minutes, with Antigravity or agy installed and signed in to Google.

1. Create an API key. In SEOmatic, open Settings, AI Agents and create an API key. Copy it; it starts with smk_live_.
2. Open the raw MCP config. In Antigravity, click the … menu at the top of the agent panel, choose MCP Servers, then Manage MCP Servers, then View raw config. This opens ~/.gemini/config/mcp_config.json.
3. Paste the SEOmatic block. Add the seomatic entry under mcpServers with serverUrl https://app.seomatic.ai/api/mcp and your key in the Authorization header. Keep any servers already there, and save.
4. Or use agy. In a terminal, run agy mcp add -H "Authorization: Bearer smk_live_..." seomatic https://app.seomatic.ai/api/mcp instead of editing the file.
5. Ask about your site. Ask: “How did my site do on Google over the last 28 days?” The answer should name the date range and your real numbers.

Use serverUrl, not url or httpUrl: Antigravity does not load remote servers written with the older keys. If the tools do not appear, reopen Manage MCP Servers and check that seomatic is listed without an error. Keep the key out of shared repos: use the global file, not .agents/mcp_config.json, unless the repo is private to you.

Pick the config file with an API key. Antigravity's OAuth sign-in for remote MCP servers has an open upstream bug, and the key avoids it completely. One block in one file gives every Antigravity surface the same SEOmatic tools.

Google Antigravity is Google's agent-first coding tool. It comes as an IDE, a desktop app and a terminal CLI called agy, and they share one MCP config, which is where SEOmatic connects.

• Gemini CLI stopped serving free, Google AI Pro and Ultra personal accounts on June 18, 2026, and agy replaced it for those accounts. If you use Gemini CLI through Google Workspace or a paid Cloud key, see Gemini SEO.
• The Gemini app at gemini.google.com is Google's chat assistant, with its own setup on the Gemini page.
• Gemini in Google Search (AI Overviews) is not a place you connect. It is one of the AI engines SEOmatic checks your visibility in.

This page covers Antigravity: the IDE, the desktop app and agy.

Connecting is free, and so is the SEOmatic account behind it: no card. A free account answers 5 questions a month from your own data, plus 10 bonus questions once you connect Google Search Console. Each tool call counts as one question, so a big request can use a few.

Free covers the diagnosis: Search Console reports and insights, site audits of up to 30 pages, live page analysis, and your AI visibility results. Live market data, like keyword volumes, backlink profiles and competitor domains, is part of paid plans, with one free keyword preview per workspace.

Paid plans remove the question limit and add the treatment: agents stage fixes on your site (titles, descriptions, content updates, technical fixes, internal links) and run campaigns and fresh AI visibility scans. Every paid plan starts with a 14-day free trial. See pricing.

Code edits Antigravity makes in your repo are its own work and do not use SEOmatic questions; only the SEOmatic tool calls do. Running several agents at once can use several questions in one request.

Antigravity can work in your repo and in SEOmatic, and both keep you in charge. In your repo, agents edit files and you review the diffs before anything ships. In your CMS, an agent can only stage a fix in SEOmatic. The API key you give Antigravity can be deleted in SEOmatic at any time. A staged change is a proposal: it says what will change and why, and nothing touches your site until you approve it. The assistant records your decision, and it is told never to approve anything on its own judgment. Approved fixes start within seconds, the page's previous state is stored, and any applied change can be rolled back. Changes that could take a page out of Google, like a noindex, need an extra explicit confirmation.

Still on Gemini CLI through Workspace? See Gemini SEO. Using another coding agent? See Claude Code SEO, Cursor and Kiro. Learn what powers the answers: page indexing checks, technical SEO fixes and meta tags. All agents: AI SEO agents in every assistant. Full reference: SEO MCP server docs.

Using another agent? See Gemini, Claude Code, Cursor, or every AI agent.