CloudCrane

CloudCrane MCP

Ask your assistant for an app, and it lands on your phone's home screen.

Your assistant writes a small app (a habit tracker, a spending log, a workout timer) and publishes it with CloudCrane. Open the link on your phone, add it to your home screen: its own icon, full screen, offline.

• Your data stays on your phone. An app reaches only the sites it lists, and you see them first.
• Every app has a blueprint. What it does, keeps and promises, in plain words.
• Checked, and with testing on, proven. No password or card fields, no undeclared camera or location; tests run in a real browser before a version is kept.
• Every version is kept. Change it by asking; go back to any version.
• Build your own from anyone's. Public apps are on Explore.

Connect

One remote MCP server, Streamable HTTP (stateless, no SSE stream), with OAuth sign-in and dynamic client registration. Nothing to install.

https://cloudcrane.ai/api/apps/mcp

(https://cloudcrane.ai/api/build/mcp, the older address, is the same server.)

Add the URL with no key. The client opens a CloudCrane page where you sign in (Google or an emailed code) and pick your workspace. Once you connect, the assistant can see, make, change, roll back and delete your apps. You can sign an assistant out at any time in the dashboard.

Sign-in has been tested with Claude, ChatGPT, Cursor and Cline. Exact settings for each are in llms-install.md, which an agent can follow to set it up.

Claude: Settings → Connectors → Add custom connector with the URL above.

ChatGPT: add a custom MCP server with the URL above and choose *OAuth*.

Cursor (~/.cursor/mcp.json):

{ "mcpServers": { "cloudcrane": { "url": "https://cloudcrane.ai/api/apps/mcp" } } }

Cline (cline_mcp_settings.json):

{ "mcpServers": { "cloudcrane": { "transport": { "type": "streamableHttp", "url": "https://cloudcrane.ai/api/apps/mcp" } } } }

Claude plugin: this repo is also a plugin. It adds nothing but the connection to the server above: no hooks, scripts or local code. What you ask for, and the apps your assistant writes, go to CloudCrane so it can check and host them; what you save in an app stays on your phone.

Gemini CLI (an extension, from this repo):

gemini extensions install https://github.com/cloudcrane-dev/cloudcrane-mcp

Then run /mcp auth cloudcrane in Gemini CLI to sign in.

Tools

When it connects, the server tells the assistant how to write an app that works here. Tools that change apps are marked so, and clients like Claude ask before each call.

Try

1. "Make me a habit tracker for water, reading and the gym, and put it on my phone."
2. "Add a 'walk 20 minutes' habit to my Habits app."
3. "My packing list app: go back to the version from before the last change."

Things that look like a broken server

• 406: MCP requires Accept: application/json, text/event-stream on every POST, even though this server never sends a stream.
• 405 on GET: the server is stateless and offers no SSE stream, so only POST is allowed. A client that silently falls back to SSE connects but lists no tools.
• 403: a request from a browser (any request with an Origin header) is refused. Call it from a server or a desktop client.

Links

• CloudCrane
• Docs

This repository holds documentation and the registry entry (server.json), not the server's source.