v0

Connect the ReUI MCP server to v0 and build UI from the ReUI registry by chat.

v0 connects to ReUI through its MCP Connections, so you can build production UI from the ReUI registry right inside a chat.

Connect ReUI

Add the ReUI MCP connection

In v0, open the Connect tab (MCP Connections) and click Add MCP. Fill in the form:

Connector settings

Name:           reui
Server URL:     https://mcp.reui.io
Authentication: OAuth

Save, and v0 starts the connection flow.

Sign in with ReUI

A browser window opens with a "Sign in with ReUI" prompt. Approve it to authorize the connection. If you do not have a ReUI account yet, a free one is created for you in that same flow, so there is nothing to set up in advance.

For headless or CI use where no browser is available, create a personal token at and pass it as an Authorization: Bearer header instead. Paste the token itself, in the form Bearer reui_pat_...: a header value is sent exactly as written, so an environment placeholder arrives at the server as literal text and the request fails with a 401.

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${...}

Add your license key

Copy your key from Account → Licenses into .env.local at the project root:

.env.local

REUI_LICENSE_KEY=your-license-key-here

Add the @reui registry to components.json

components.json

{
  "registries": {
    "@reui": {
      "url": "https://reui.io/r/{style}/{name}.json",
      "headers": {
        "Authorization": "Bearer ${REUI_LICENSE_KEY}"
      }
    }
  }
}

The ${REUI_LICENSE_KEY} here is correct: the shadcn CLI reads components.json and expands the variable from your env. An MCP client config does not do that, so the MCP server connection above needs the real token pasted in.