Demo stage for vibe-coded prototypes

Your prototype.
Your subdomain.

You built something with an AI agent. Now share it under a link like project-name.demo.st — static hosting, optional document API, no DevOps.

MCP live — add endpoint in your agent.
your-project.demo.st
Your prototype lives here

How it works

From prototype to shareable link in minutes. No DevOps, no config.

  1. Build your thing

    Use Cursor, Bolt, or any AI coding tool. Vibe-code your prototype until it does what you need.

  2. Publish via MCP

    Connect demo.st as an MCP server in your agent. One command to pick a subdomain and deploy.

  3. Share the link

    Send yourproject.demo.st. Need data? Use the document API at api.demo.st with your site key.

MCP config

To use demo.st from your agent (Cursor, Claude Desktop, etc.): add the endpoint URL and send an Authorization: Bearer <token> header. Get the token by signing in and opening the MCP page (or GET /api/mcp/token). Static hosting plus optional document API at api.demo.st.

Full instructions: MCP endpoint and token setup →

Who it's for

Made for vibe-coders who ship. You built something real — don't let it live on localhost.

Product Manager

Built a feature validation prototype in Cursor. Needs to share it with the dev team tomorrow.

feature-v2.demo.st

Business Analyst

Made a client-facing dashboard from an AI template. Wants to show it in the weekly review without screensharing.

q4-dashboard.demo.st

Consultant

Prototyped a CRM workflow for a prospect. Needs a professional-looking URL to include in the proposal.

crm-demo.demo.st

Founder

Has an MVP that half-works. Wants to start user interviews with a live link to hand to people.

mvp-alpha.demo.st

Everything you need, nothing you don't

Subdomain hosting serves your uploaded files (HTML, CSS, JavaScript, images) via Nginx — no PHP or custom backends. For data, use the optional document API at api.demo.st (see the MCP page).

No config

Pick a name, publish. No DNS records, no servers to set up.

MCP-native

Works from Cursor, Claude Desktop, or any MCP-compatible agent.

Instant deploy

Your project is live within seconds of running the publish command.

Clean URLs

yourproject.demo.st looks intentional. Not a random ngrok hash.

Manage via dashboard

See all your deployments, swap content, or take a project offline.

Document API

Optional JSON store at api.demo.st — collections and records scoped to your site key.

Share-ready

Send it in email, drop it in Slack, add it to a proposal. It just works.

Publish from your agent

Connect demo.st as an MCP server: add the endpoint URL and your MCP token (sign in → open /mcp → copy token → add as Authorization: Bearer <token>). Reserve a subdomain, upload a zip, and optionally use the document API at api.demo.st with your site key. Full MCP and token instructions →

Discovery: GET /.well-known/mcp or GET /mcp.json for endpoint and auth details.