How do I connect Grok Build to xSpeed?
Put your sites in xSpeed Hub once, then add one URL to Grok Build.
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 with grok mcp add
Run this once. Add --scope project to write the server to .grok/config.toml in the current directory instead of your user config, which is only sensible if the repo never holds a token. Grok Build handles the OAuth flow for a remote server on its own.
grok mcp add --transport http xspeedhub https://app.xspeedcache.com/xspeed/mcp
3Sign in from the TUI
Start grok and open /mcps. Select xspeedhub and press i to authenticate, or just use a Hub tool and let the browser flow start on first use. Sign in to xSpeed Hub and approve access. There is no token to paste; Grok Build stores the credentials it receives in ~/.grok/mcp_credentials.json. If the connection fails, run grok mcp doctor xspeedhub.
/mcps
4Or use a connection token alternative
If you prefer a header, copy the connection token from Connect AI in the Hub (only the workspace owner sees it), export it as XSPEED_HUB_TOKEN, and name the variable in your config. Grok Build then sends it as a bearer token, and the token never lands in the file.
[mcp_servers.xspeedhub] url = "https://app.xspeedcache.com/xspeed/mcp" bearer_token_env_var = "XSPEED_HUB_TOKEN"
Use xSpeed Hub to list my sites, then show the object cache status of each one.
You: Using xSpeed Hub, is Redis working on shop? If it is, turn the object cache on.
get_object_cache_status(site: shop) read-only
→ object cache off, Redis drop-in not installed
test_object_cache(site: shop) read-only
→ Redis reachable on 127.0.0.1, 2 ms round trip
Grok Build: Redis answers from the server, and the object cache is off. Turning it on installs the drop-in on shop. Do that now?
You: Yes, enable it.
toggle_object_cache(site: shop, enabled: true) changes site
→ object cache enabled, drop-in installed
Grok Build: The object cache is on for shop. If anything looks stale on the site, I can flush it.
Using it
Prompts to try in Grok Build
Paste one as it is, or change the site name.
Use xSpeed Hub to show the cache hit ratio for every site and flag anything under 70%.
With xSpeed Hub, purge the assets cache on shop, then show the cache status.
Use xSpeed Hub to run a desktop PageSpeed test on blog and compare it with the stored history.
Ask xSpeed Hub to start the preloader on docs and report how many URLs it queued.
Using xSpeed Hub, which of my sites has Cloudflare connected? Verify each connection without purging anything.
What can Grok Build do with xSpeed?
A guide for each job, written for Grok Build.
Purge the WordPress cache with Grok Build
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 Grok Build
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 Grok Build
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 Grok Build
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 Grok Build
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 Grok Build
See which modules a site has, read their current settings, change them, and turn page caching on or off.
Warm the WordPress cache with Grok Build
Fill the page cache before visitors arrive, for example right after a purge or a deploy.
Set up the Redis object cache with Grok Build
Connect a site to Redis or Memcached so database results survive between requests.
Manage Cloudflare caching with Grok Build
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 Grok Build
Run one action across all of your sites, or a chosen few, and read the result site by site.
Trust and safety
Does Grok Build ask before it changes my site?
Grok Build starts in Ask mode, which prompts for anything a rule has not already allowed, so a Hub write tool prompts until you say otherwise. You can allow the reads with a rule such as MCPTool(xspeedhub__get_*) in the permission section of your config, and leave the writes unmatched. Evaluation runs deny, then ask, then allow. Two other modes remove the prompt: Always-approve, from /always-approve, Ctrl+O or --always-approve, approves tool calls unless a deny rule or a hook stops them, and Auto lets a classifier approve tools it judges safe. If a Hub write must never run unprompted, add a deny rule. The Hub itself has no confirmation step.
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
- Always-approve skips prompts for Hub writes too. Use a deny rule for any tool that must never run unprompted, because deny rules still apply in that mode.
- Project-scoped config replaces a user server of the same name entirely. Keep one xspeedhub entry unless you mean to override.
- Grok Build also reads MCP configs from ~/.claude.json, .cursor/mcp.json and project .mcp.json, merged below config.toml. If xspeedhub appears twice, run grok inspect to see where each copy came from.
Reference
What is Grok Build?
Grok Build is xAI's coding agent. You use it through a terminal interface, headlessly in scripts with grok -p, or through the Agent Client Protocol in other apps. It reads and edits code, runs commands, and calls tools from MCP servers you add.
MCP, the Model Context Protocol, is how Grok Build reaches services outside your machine. Remote servers are added with grok mcp add, and their tools join the built-in ones under the name server, two underscores, tool. Adding xSpeed Hub that way gives it 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
- xAI
- Type
- Terminal
- Connects with
- grok mcp add --transport http, then a browser sign-in
- Sign-in
- OAuth sign-in or connection token
- Last checked
- October 2026
Why use Grok Build with xSpeed?
Rules that match by name
Hub tools carry the xspeedhub__ prefix, so one MCPTool rule can allow every get_ read while each write keeps its prompt.
A doctor command
grok mcp doctor checks your configuration and connectivity, which saves guessing when a sign-in or a URL is wrong.
User or project scope
Keep the Hub in your user config for every repo, or add it with --scope project so a repository carries the server definition for the team.
How does Grok Build 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 |
|---|---|---|---|---|
| Grok Build | xAI | Terminal | grok mcp add --transport http, then a browser sign-in | OAuth sign-in or connection token |
| Grok | xAI | Chat app | grok.com/connectors, New Connector, Custom | OAuth sign-in |
| Grok Bot | xAI | Always-on agent | a custom remote HTTPS MCP server plugin, added from chat | OAuth sign-in |
| 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 |
Which way should I connect?
Grok Build 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
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
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
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
Frequently asked questions
Also works with
Documentation
From the blog
- How to Let Claude or ChatGPT Manage Your WordPress Site Speed (via MCP)
- Connecting Claude to a WordPress Fleet in 2026: One of These Five Routes You May Already Be Paying For
- xSpeed Cache MCP vs WP Rocket MCP in 2026: One Connects Once, the Other Once Per Site
- 10 Best WordPress MCP Servers in 2026: 486 in the Directory, Four With More Than Ten Reviews