Google

Editor

Antigravity + xSpeed

Antigravity is Google's AI coding environment, available as an IDE, a command-line tool and Antigravity 2.0, and with xSpeed Hub added as an MCP server its agent can read cache status, purge, change settings and run speed tests on every WordPress site in your workspace. You add one serverUrl entry, authenticate once, and ask in plain language.

One entry in mcp_config.json serves Antigravity 2.0, the CLI and the IDE alike
Unconfigured MCP tools start in Ask mode, and allow rules can be written per tool: mcp(xspeedhub/get_cache_status)
Every site you connected to the Hub is reachable from the same agent session

Connect Antigravity Open xSpeed Hub

Last updated: October 2026

Antigravity Editor

xSpeed Hub 29 tools

shop
blog
docs

Connects with mcp_config.json with serverUrl, then Authenticate in settings. Sign-in: OAuth sign-in or connection token.

How do I connect Antigravity to xSpeed?

Put your sites in xSpeed Hub once, then add one URL to Antigravity.

1Connect4 steps

1Put your sites in xSpeed Hub

Sign in at app.xspeedcache.com with Google or email; the Hub is free and has no site cap. Then connect each WordPress site from its own dashboard: click Connect Hub in the xSpeed Cache top bar, then Connect via xSpeed Hub. Each site needs the free xSpeed Cache plugin.

2Add xSpeed Hub to mcp_config.json

Antigravity reads ~/.gemini/config/mcp_config.json for every project, or .agents/mcp_config.json inside one workspace. In the IDE, open the ... menu at the top of the agent side panel, choose MCP Servers, then Manage MCP Servers and View raw config. Remote servers must use the serverUrl field; the older url and httpUrl fields are not supported.

~/.gemini/config/mcp_config.json

{
  "mcpServers": {
    "xspeedhub": {
      "serverUrl": "https://app.xspeedcache.com/xspeed/mcp"
    }
  }
}

3Authenticate

Open Agent settings with Cmd+, on macOS or Ctrl+, on Windows and Linux, go to the Customizations tab and click Authenticate next to xspeedhub. Sign in to xSpeed Hub in the browser and approve access, copy the authorization code the page shows, paste it into the settings panel and click Submit. Antigravity keeps the credentials it receives and refreshes them. In the CLI, type /mcp to open the MCP manager and check the server status.

Text

Settings → Customizations → Authenticate

4Or use a connection token alternative

Copy the connection token from Connect AI in the Hub (only the workspace owner sees it) and send it as a header. Keep this entry in the global file, not in a workspace file that you commit.

~/.gemini/config/mcp_config.json

{
  "mcpServers": {
    "xspeedhub": {
      "serverUrl": "https://app.xspeedcache.com/xspeed/mcp",
      "headers": {
        "Authorization": "Bearer <your connection token>"
      }
    }
  }
}

1 / 4

2Askexample session

Check it worked

Use xSpeed Hub to list my sites and tell me which ones have no Redis object cache turned on.

Example session · Antigravity

You: Use xSpeed Hub to preview a safe optimization pass on the docs site. Do not apply it.

optimize_site(site: docs, aggressiveness: safe, dry_run: true) dry run
→ preview only: 3 settings would change, nothing applied

Antigravity: A safe pass would change 3 settings on docs, and the preview applied nothing. Apply it to docs now?

You: Yes, apply it.

optimize_site(site: docs, aggressiveness: safe) changes site
→ applied 3 settings; verify_urls returned for the home page and one article

Antigravity: Applied. The Hub asks me to open the verify URLs before I call this a success, so I will check the home page and the article next.

Using it

Prompts to try in Antigravity

Paste one as it is, or change the site name.

Prompt

With xSpeed Hub, show page cache status and hit ratio for every site, and flag anything under 70%.

Prompt

Use xSpeed Hub to purge the shop cache, then start the preloader and report how many URLs it queued.

Prompt

Use xSpeed Hub to run a mobile PageSpeed test on the blog and compare it with the stored score history.

Prompt

Ask xSpeed Hub to preview what optimize_site would change on docs with a safe pass. Do not apply it.

Prompt

Using xSpeed Hub, test whether Redis answers on shop before you turn on the object cache.

What can Antigravity do with xSpeed?

A guide for each job, written for Antigravity.

Purge the WordPress cache with Antigravity

Clear stale pages after a deploy, an edit or a plugin update, on one site or all of them.

Find out why WordPress pages are not cached with Antigravity

Work out why a site misses the cache, serves slow pages or shows a low hit ratio, using read-only checks first.

Scan a website for speed problems with Antigravity

Get a graded speed report with the fix for every failing check and a link you can share, for your own site or any public URL.

Run and track PageSpeed tests with Antigravity

Read the PageSpeed scores a site already has, run a new test when something changed, and tell a Lighthouse score from a cache benchmark.

Raise a WordPress site's PageSpeed score with Antigravity

Preview and apply xSpeed's recommended settings to a site, check the pages still work, and be told plainly what caching cannot fix.

Tune WordPress cache settings with Antigravity

See which modules a site has, read their current settings, change them, and turn page caching on or off.

Warm the WordPress cache with Antigravity

Fill the page cache before visitors arrive, for example right after a purge or a deploy.

Set up the Redis object cache with Antigravity

Connect a site to Redis or Memcached so database results survive between requests.

Manage Cloudflare caching with Antigravity

Check the Cloudflare connection, clear the edge cache and switch development mode on or off for a site.

Manage every WordPress site at once with Antigravity

Run one action across all of your sites, or a chosen few, and read the result site by site.

Trust and safety

Does Antigravity ask before it changes my site?

Antigravity

Antigravity runs unconfigured MCP tools in Ask mode, so each call waits for your approval in a card before it executes. Allow rules such as mcp(xspeedhub/get_cache_status) or mcp(xspeedhub/*) let calls through without a prompt, Ask and Deny rules take precedence over Allow, and the Turbo permission preset allows MCP and web actions without asking. When you approve a card you can also edit its target to widen the grant. With Turbo or a broad allow rule, a write reaches the Hub as soon as your connection allows writes. xSpeed Hub has no confirmation step of its own.

xSpeed Hub

xSpeed Hub has no confirmation step of its own. Read tools change nothing on your sites, with one exception to know about: contact_support sends an email to xSpeed support, and a read-only connection can still call it. A write tool (a purge, a settings change, a cache toggle, or a speed test that spends the shared allowance) runs as soon as your connection allows writes. Three things stand between a prompt and a change: your connection's scope, because a read-only connection refuses every write tool (the connection token has a Read-only everywhere switch, and a Viewer member only ever gets read access); your AI client's own tool-approval prompt; and the Hub's instructions to the agent, which tell it to confirm the target site and to ask once before a write that touches every site.

Good to know

Use serverUrl for the Hub address. Antigravity states that the legacy url and httpUrl fields are not supported for remote servers.
The Turbo permission preset allows MCP and web actions without asking. If you use it, add an Ask rule for the xSpeed write tools. For read-only access, send the connection token with Read-only everywhere on, or sign in as a Viewer member.
The sign-in ends with a code you paste back into the settings panel, so finish it in a session where you can switch between the browser and the editor.
A workspace file at .agents/mcp_config.json is meant to live in the project. Keep the connection token out of any file you commit.

Reference

What is Antigravity?

Antigravity is Google's AI coding environment. It is available as Antigravity 2.0, a command-line tool and an IDE, and its agent can edit code, run commands and call tools on MCP servers that you configure.

MCP, the Model Context Protocol, is how Antigravity reaches services outside your machine. Adding xSpeed Hub as a remote server gives the agent the Hub's caching tools: status, purge, settings, preloader, object cache, Cloudflare and speed tests, for every site in your workspace.

At a glance

Made by: Google
Type: Editor
Connects with: mcp_config.json with serverUrl, then Authenticate in settings
Sign-in: OAuth sign-in or connection token
Last checked: October 2026

Why use Antigravity with xSpeed?

One config for every Antigravity surface

The same mcp_config.json format applies to Antigravity 2.0, the CLI and the IDE, so one entry in the global file covers all three.

Allow rules written per tool

The permission syntax names the server and the tool, so you can allow every xSpeed read with one rule and keep each write on Ask.

The whole fleet behind one entry

The Hub fronts every site you connected. Ask about one site by name, or ask a question that spans all of them and read the per-site result.

How does Antigravity compare with other AI clients?

Every client below reaches the same 29 Hub tools once connected. What differs is where it runs, how you add the server and how it signs in.

Client	Made by	Type	How you connect it	Sign-in
Antigravity	Google	Editor	mcp_config.json with serverUrl, then Authenticate in settings	OAuth sign-in or connection token
Gemini CLI	Google	Terminal	gemini mcp add, then /mcp auth xspeedhub	OAuth sign-in or connection token
Claude	Anthropic	Chat app	Customize, Connectors, Add custom connector	OAuth sign-in or connection token
ChatGPT	OpenAI	Chat app	Developer mode, then a custom MCP app	OAuth sign-in
Claude Code	Anthropic	Terminal	claude mcp add, then /mcp to sign in	OAuth sign-in or connection token

Also from Google Gemini CLI

Which way should I connect?

Antigravity can use the Hub, one site's own MCP server, or the no-account Scan MCP. The Hub is the one most people want.

xSpeed Hub MCPMost people

https://app.xspeedcache.com/xspeed/mcp

Best for: Most people. One URL in your AI client, every site behind it.
Reaches: Every site in your workspace, one connection
Sign-in: OAuth sign-in in the browser, or a connection token in an Authorization header
Tools: 29 tools (16 read, 13 write), seven of them can act on every site at once

Read the guide →

xSpeed Cache Site MCP

https://your-site.com/xspeed/mcp

Best for: A single site, or work the Hub does not expose, such as database cleanup.
Reaches: One WordPress site
Sign-in: OAuth sign-in by a site admin, or the site's own token in an Authorization header
Tools: The full per-site tool set plus run_command for the WP-CLI surface

Read the guide →

xSpeed Scan MCP

https://xspeedcache.com/scan/mcp

Best for: Grading a site you do not run, or trying xSpeed before you install anything.
Reaches: Any public URL, read-only
Sign-in: None. No account.
Tools: 5 tools: run_speed_scan, get_speed_scan and three product-info tools

Read the guide →

WP-CLI

wp xspeed …

Best for: Agents that already run commands on the server, such as Claude Code or Codex over SSH.
Reaches: The site whose server the agent has a shell on
Sign-in: Your server login
Tools: Every xSpeed command: cache, purge, preloader, objcache, cf, score, settings and more

Read the guide →

Frequently asked questions

Add an xspeedhub entry with a serverUrl of https://app.xspeedcache.com/xspeed/mcp to mcp_config.json, either the global file at ~/.gemini/config/mcp_config.json or .agents/mcp_config.json in a workspace. Then open Agent settings, go to Customizations and click Authenticate next to the server.

No. Antigravity handles OAuth automatically for servers that support dynamic client registration, and xSpeed Hub does. You approve access in the browser and paste the authorization code it shows into the settings panel. If you prefer a header, the workspace owner can copy the connection token from the Hub's Connect AI page.

By default it asks. Unconfigured MCP tools run in Ask mode and wait for your approval. The Hub has no confirmation step of its own, so an allow rule or the Turbo preset lets a write run without a prompt. Allow reads, keep writes on Ask. For read-only access, send the connection token with Read-only everywhere on, or sign in as a Viewer member.

The 29 tools of the xSpeed Hub MCP server. Sixteen only read. Thirteen change a site or spend the shared speed-test allowance. In allow rules you name them as mcp(xspeedhub/tool), for example mcp(xspeedhub/purge_cache). To hide a tool from the model, list it in disabledTools on the server entry.

Antigravity requires the serverUrl field for remote servers, whether they use streamable HTTP, SSE or WebSocket, and says the older url and httpUrl fields are not supported. An entry that uses url is not supported.

Yes. The documentation applies the same mcp_config.json format to Antigravity 2.0, the CLI and the IDE. In the CLI, type /mcp to open the MCP manager and see server status.

Yes. The xSpeed Cache plugin has its own MCP server at your-site.com/xspeed/mcp, and you add it as another serverUrl entry. The Hub is the better fit once you have more than one site.

Set disabled to true on the entry or delete it from mcp_config.json. In Antigravity 2.0 you can also use the toggle or trash icon in Settings, Customizations. Rotating or disconnecting the connection token in the Hub revokes only clients that send that token, so it does not end an OAuth sign-in; that is removed in Antigravity.

Connect Antigravity to every site at once.

xSpeed Hub is free and has no site cap. Connect your sites, add one URL, and ask.

Open xSpeed Hub All AI agents

Antigravity + xSpeed

How do I connect Antigravity to xSpeed?

Prompts to try in Antigravity

What can Antigravity do with xSpeed?

Does Antigravity ask before it changes my site?

What is Antigravity?

Why use Antigravity with xSpeed?

How does Antigravity compare with other AI clients?

Which way should I connect?

xSpeed Hub MCPMost people

xSpeed Cache Site MCP

xSpeed Scan MCP

WP-CLI

Frequently asked questions

Also works with

Connect Antigravity to every site at once.