Grok + xCloud

Run Docker apps with Grok on xCloud

Running Docker apps with Grok Build means typing short instructions to xAI's terminal agent in the project that holds your Dockerfile or Compose file, and letting xCloud scan it, preview the site, deploy it after your yes and keep it backed up.

Skill: xcloud:deploy
Toolsets: sites, servers
Free with every xCloud account

Set up Grok All Grok guides

Youdeploy this as a compose app to Frankfurt. scan first.

git_compose-scanread-only

AgentServices: web (8080), cache (none). Suggested port 8080, free on Frankfurt. Dry run next.

servers_sites_git_dockerdry run

AgentDry run clean: docker-compose.yml, port 8080, staging hostname assigned. Create it on Frankfurt?

Youyes

servers_sites_git_dockerneeds approval

AgentCreated with the same body and an idempotency key. Provisioning has started on Frankfurt; I am polling the site status and will fetch the URL once it is live.

Last updated: October 2026. Keep a human in the loop: xCloud stops and asks before anything that creates, deploys, updates, reboots, deletes or buys.

Setup

How Do You Set Up Grok to Run Docker apps on xCloud?

Connect Grok once; every job on this account uses the same connection. Then ask in plain words.

1
Add the xCloud MCP server
Run this in your terminal, then start grok. The first time it calls xCloud, a browser opens on the xCloud approval screen, where you tick the teams and choose Read-only or Full access. Add --scope project to save the entry in .grok/config.toml for one repository instead.
Terminal
```
grok mcp add --transport http xcloud https://app.xcloud.host/mcp
```
2
Or edit ~/.grok/config.toml
Add this table to ~/.grok/config.toml, then run grok mcp doctor xcloud to check the connection. The url key is the one for HTTP servers.
TOML
```
[mcp_servers.xcloud]
url = "https://app.xcloud.host/mcp"
```
3
No browser? Use an API key
For a headless machine, create a token with the mcp:invoke scope plus the read abilities for the areas it will use (read:servers and read:sites, with read:billing and read:addons for billing and add-on tools) and the matching write: abilities if it should change things in Settings, Developers, API Tokens. Put it in an environment variable the machine starts Grok with, such as XCLOUD_TOKEN in a systemd EnvironmentFile or your shell profile, and pass a reference to it with --header. Keep the single quotes so the shell leaves ${XCLOUD_TOKEN} alone: Grok expands ${VAR} in headers when it loads the config, so the token itself never lands in your shell history or in config.toml. Run grok mcp doctor xcloud to confirm it works.
Terminal
```
grok mcp add --transport http --header 'Authorization: Bearer ${XCLOUD_TOKEN}' xcloud https://app.xcloud.host/mcp
```
✓
Check it worked
Then ask Grok for the job itself, for example:
Prompt
```
scan compose in this repo, list services and ports xCloud would use
```

In practice

How Does Docker apps Work from Grok?

Grok Build lives where the Dockerfile lives. You run grok in the project, and because you can register xCloud with grok mcp add --scope project, the entry can sit in that repository's .grok/config.toml, holding only the server URL, while the OAuth tokens stay under ~/.grok. The Docker job then reads like a shell session. You type deploy this as a Compose app on the Frankfurt Docker server, Grok Build calls git_detect and git_compose-scan, and the answer is a few lines: services, published ports, suggested port. The /mcps tab in the session lists the xCloud tools if you want to see exactly which ones are loaded, and grok mcp doctor xcloud tells you why they are missing.

Prompts for this agent work best when they are terse and one-directional. Scan first, then dry run, then wait. Grok Build sends the Docker create as a dry run, prints the compose file, the port and any warnings, and stops. A yes sends the confirmed call with an idempotency key, and it polls the site status until the state is terminal. If the scan shows a Compose file that publishes no port or pulls from a private registry, Grok Build edits the file in your working tree, shows the diff and leaves the commit to you. The deploy reads the repository, not your disk.

For backups, ask in one line before a risky change. Grok Build takes the Docker backup, which runs without a prompt, then lists the backups until the new one is completed. Read the backup settings the same way when you want to know which apps have no schedule. Because the app stops while the snapshot is captured, a late-night backup is kinder than one at noon.

Grok specific: This page covers Grok Build, the terminal agent, which needs --transport http on grok mcp add for a remote server. Without it the argument is treated as a local command. Grok at grok.com is a chat app with its own connector settings and cannot see your local files, so there you give it a GitHub address instead of saying this repo. Check the connector settings page for the current steps and use the same server URL.

What xCloud does for docker apps

xCloud reads the repository, scans the Compose file for services and ports before anything is created, previews the site with a dry run and deploys it behind its own nginx once you approve. Docker sites can be backed up on demand and on a schedule, and a failed deploy is diagnosed and retried on the same site.

Pick a Docker server. The agent uses the server you name, or lists your servers and asks. A Docker deploy needs a Docker server; any other stack answers with an incompatible_server refusal, and an agentic server never takes a second site. WordPress is not supported on Docker servers.
Detect the repository. git_detect reads the repository root for a Dockerfile or one of the four Compose file names, and checks access and server compatibility. It creates nothing, and an access problem is never worked around by naming an app type by hand.
Scan the Compose file. git_compose-scan runs before the dry run. It lists the services and the host ports the file publishes, resolves which Compose file name it found, and suggests a primary port. The agent never guesses the port.
Dry run, then one approval. The agent sends the Docker create request with dry_run set to true and shows the resolved configuration: compose file, port, address and warnings. It asks once, naming the server and the URL, before sending the same body with confirm set to true and an idempotency key.
Poll and verify. A 202 means queued, not running. The agent polls the site status until it is terminal, reads failed_steps and the SSL block, and fetches the URL before it calls the app live. A 502 here usually means the Compose file publishes no port.
Back up and recover. The agent can take a Docker backup, read the backup list and settings, and add a note to a backup. If a deploy fails it reads the diagnosis, proposes a fix from the correctable fields and retries on the same site after your approval. Restoring a backup is a dashboard step.

Reference

Docker apps Settings and Limits on xCloud

The facts Grok works within when it runs Docker apps. Where a row names the dashboard, that step stays yours to take there.

Setting or limit	What applies
Supported inputs	A Dockerfile for a single container, or a Compose file for one or more services, on a Docker server. Go, Python, Rust and Java apps all deploy this way
Server stack	Docker servers only. The Docker deploy on any other stack, including an agentic server, answers 422 with the code incompatible_server
Which Compose file runs	docker-compose.yml at the repository root. A file named compose.yaml, compose.yml or docker-compose.yaml, or one in a subdirectory, deploys through the pinned Docker create with docker.compose_file set to the path the scan resolved
Public port	xCloud's nginx owns ports 80 and 443 and proxies to one host port of 1024 or higher on 127.0.0.1. xCloud runs your Compose file as-is and never rewrites its ports mapping
Port refusals	A port another site already holds is refused as port_unavailable. A port the file does not publish is refused as port_not_published, with the published ports listed
No published port	A Compose file that publishes no port is accepted and then answers 502, so the scan is the step that catches it
Private registries	The deploy runs docker compose pull and never docker login, so an image from a private registry cannot be pulled. Build the image from source instead
Environment and redeploys	Send environment values through env_file_content. A redeploy runs git reset --hard and git clean -df in the site directory, so uncommitted server-side changes are lost
What a Docker backup holds	Named volumes, eligible bind mounts, the Compose file and the app's .env, in an encrypted snapshot. The app is stopped while the backup captures and restarted afterwards
Backup tools	Take a backup, list backups, read the count and the settings, change the settings, add a note and delete a backup. Remote copies go to a storage provider you add in the dashboard
Restores	A restore replaces the app's data in place, so it stays a dashboard step: Site, Site Backup, Previous Backups, Restore Backup
Dot-prefixed paths	A 403 on a path that starts with a dot is the dot-path allowlist. It is fixed with docker.allowed_dot_paths in the deploy settings, without a rebuild

Rules Grok has to follow

The Compose file is scanned before the dry run, and the port always comes from the scan, never from a guess.
A file that binds ports 80 or 443, publishes no port or pulls from a private registry is not deployed as-is. The agent shows the rewrite, such as publishing 127.0.0.1:<high port>:<app port> and building the image from source, and the change goes into your repository.
Creating a site, deploying, redeploying and deleting a backup stop for your approval. A backup runs without a separate prompt but stops the app while it captures, so ask for one at a quiet time.
A failed Docker site is retried in place with corrections. It is never deleted and recreated, because it keeps its domain and port.
Restoring a backup, adding a backup storage provider and changing a live site's domain are dashboard steps; the agent gives you the path and the dashboard link xCloud returned.

Example prompts

What Can You Ask Grok to Do for Docker apps?

Type these as written and swap in your own repository, site and server names. Reads and routine actions such as backups, cache purges, PageSpeed scans and vulnerability scans run straight away; creating, deploying, updating, rebooting, deleting, buying or starting a broken-link scan stops and asks first.

Prompt

scan compose in this repo, list services and ports xCloud would use

Prompt

deploy this as a compose app to the Frankfurt Docker server, dry run first, wait for my yes

Prompt

back up the docker app on notes.example.com now and tell me when it completes

Prompt

Scan the docker-compose.yml in github.com/acme/api and tell me which services and ports xCloud would use.

Prompt

Deploy github.com/acme/shop to the Frankfurt Docker server as a Compose app. Scan the compose file first, show me the services and ports, then wait for my approval before creating anything.

Prompt

Deploy the main branch of github.com/acme/api to my Docker server as a Compose app on a staging hostname.

Prompt

My Compose app on notes.example.com answers 502. Check which port its compose file publishes and which port xCloud is using.

Prompt

Take a backup of the Docker app on notes.example.com now, before I upgrade it, and tell me when it is done.

Prompt

Show the backup settings and the last backup of every Docker app on this team, and list the ones with no schedule.

Prompt

The last deploy of the API site failed. Diagnose it, show me the settings I can correct, fix the build command and retry on the same site.

Grok and Docker apps: Frequently Asked Questions

What people ask before they let Grok run Docker apps through xCloud.

Should I save the xCloud entry per project in Grok Build?

It is a good fit for Docker work. Run grok mcp add with --scope project in the repository that holds the Compose file, and the entry lives in .grok/config.toml with only the URL in it. Sign-in tokens stay under ~/.grok, so the file is safe to review.

How do I check that Grok Build can reach the Docker tools?

Run grok mcp doctor xcloud, then open the MCP tab with /mcps inside a session to see the tools that loaded. If git_compose-scan is missing, fix the connection first, because a Docker deploy without the scan would have to guess the port.

Which servers can run a Docker app on xCloud?

Docker servers. Node.js, PHP and static builds use Nginx or OpenLiteSpeed servers, and the Docker deploy on any other stack is refused with an incompatible_server code. An OpenClaw, Hermes, Paperclip or DeepSeek Harness server hosts only the site created at provisioning, so it takes no Docker app.

Why does the agent scan the Compose file before deploying?

xCloud proxies to the host port your file publishes and never rewrites it. The scan lists the services and ports, so the agent picks a port that is free on the server and published by the file instead of guessing.

Why does my Compose app answer 502 after it deployed?

The most common cause is a Compose file that publishes no port: xCloud accepts it, then its nginx has nothing to proxy to. Publish the app on 127.0.0.1 with a high port, such as 127.0.0.1:8080:8080, and redeploy.

Can an agent deploy an image from a private registry?

Not as-is. The deploy runs docker compose pull and never docker login, so a private image cannot be pulled. Build the image from source in the Compose file, or deploy a repository that does.

Can an agent back up and restore a Docker app?

It can take a backup, read the backup list and settings, change the settings, add a note and delete a backup. Restoring replaces the app's data in place, so you do that in the dashboard under Site, Site Backup, Previous Backups.

Can I run WordPress as a Docker app on xCloud?

No. Creating a WordPress site on a Docker server is refused because WordPress is not supported on Docker servers. Use an Nginx or OpenLiteSpeed server for WordPress.

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