mcpu

mcpu is an MCP control surface for a Cloudflare Artifacts repo. GitHub is only the bootstrap seed. After first deploy, source commits live in Cloudflare Artifacts and deploy back to Cloudflare Workers.

Start here

1. Deploy to your Cloudflare account

Click Deploy to Cloudflare above and finish the deploy flow.

When it completes, copy your Worker URL. It will look like:

https://mcpu.<your-subdomain>.workers.dev

If you deploy with workers_dev = false, use the route or custom domain you configured instead.

2. Protect /mcp

Before adding deploy-capable secrets, protect /mcp with Cloudflare Access or an equivalent auth layer. Do not expose a public MCP endpoint with ARTIFACTS_TOKEN or CLOUDFLARE_API_TOKEN configured.

3. Add secrets for the Artifact loop

mcpu needs an Artifacts Git remote and token before repo.commit can push source to Cloudflare Artifacts.

Set these Worker secrets/vars in your account:

ARTIFACTS_REMOTE=https://<account-id>.artifacts.cloudflare.net/git/default/mcpu.git
ARTIFACTS_TOKEN=art_v1_...
ARTIFACTS_BRANCH=main
MCPU_SCRIPT_NAME=mcpu
CLOUDFLARE_ACCOUNT_ID=<account-id>
CLOUDFLARE_API_TOKEN=<token that can edit Workers>

GitHub is not used after bootstrap.

4. Add mcpu to your MCP config

Use your deployed Worker URL plus /mcp.

{
  "mcpServers": {
    "mcpu": {
      "url": "https://mcpu.<your-subdomain>.workers.dev/mcp"
    }
  }
}

For a custom domain:

{
  "mcpServers": {
    "mcpu": {
      "url": "https://mcpu.example.com/mcp"
    }
  }
}

5. Try it

Ask your agent:

Connect to mcpu. Run repo.status, list files, read worker.js, change the homepage text, show the diff, commit it, and deploy it.

Expected loop:

repo.write -> repo.diff -> repo.commit -> Cloudflare Artifacts -> repo.deploy -> Cloudflare Workers

Related MCP server: Remote MCP Server Authless

Local development

Run the seed locally:

npm install
npm test
npm run dev -- --port 8799

Then connect to:

http://localhost:8799/mcp

Local MCP config:

{
  "mcpServers": {
    "mcpu-local": {
      "url": "http://localhost:8799/mcp"
    }
  }
}

Reference

Tools:

• repo.status

• repo.ls

• repo.read

• repo.write

• repo.diff

• repo.commit

• repo.deploy

• repo.history

State:

• draft - mutable working tree

• artifact - immutable source commit in Cloudflare Artifacts

• deployment - Worker version deployed from an Artifact

Explanation

GitHub gets you to zero. Cloudflare owns everything after.

The demo is intentionally tiny: a live MCP edits a Cloudflare Artifacts repo, commits it, and deploys that Artifact as the next version of itself.