Blitz

About

Blitz is a native macOS app with a built-in MCP server (about 35 tools) that lets an agent work through the iOS development lifecycle. It can run the iOS Simulator, manage in-app purchases and subscriptions, upload screenshots, handle TestFlight testers and builds, and submit apps for App Store review.

The MCP server runs locally over stdio through the npm package @blitzdev/blitz-mcp, and the Blitz app binds to 127.0.0.1 only. It needs macOS 14 or later and the Blitz app installed, plus App Store Connect access for submission features. Official release builds send anonymous usage telemetry, as described in the project README.

What you can do

• Submit iOS apps to App Store review
• Manage app versions, pricing and listings
• Create in-app purchases and subscriptions
• Upload screenshots for all device sizes and locales
• Add TestFlight testers and manage builds
• Boot and control the iOS Simulator, including touch and screen capture

Tools

Local servers list their tools once they’re running, and this one doesn’t publish its list in advance. Your client shows them after you add it.

Example prompts

• Submit my app's latest build to App Store review.

• Create a monthly subscription and attach it to the next version.

• Boot an iPhone simulator and take a screenshot of the home screen.

• Add these email addresses as TestFlight testers.

Set up

Every client starts Blitz on your machine with the same command. Pick yours; the page remembers your choice.

claude mcp add --transport stdio blitz -- npx -y @blitzdev/blitz-mcp

{
  "mcpServers": {
    "blitz": {
      "command": "npx",
      "args": [
        "-y",
        "@blitzdev/blitz-mcp"
      ]
    }
  }
}

{
  "mcpServers": {
    "blitz": {
      "command": "npx",
      "args": [
        "-y",
        "@blitzdev/blitz-mcp"
      ]
    }
  }
}

code --add-mcp '{"name":"blitz","type":"stdio","command":"npx","args":["-y","@blitzdev/blitz-mcp"]}'

{
  "servers": {
    "blitz": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@blitzdev/blitz-mcp"
      ]
    }
  }
}

{
  "mcpServers": {
    "blitz": {
      "command": "npx",
      "args": [
        "-y",
        "@blitzdev/blitz-mcp"
      ]
    }
  }
}

codex mcp add blitz -- npx -y @blitzdev/blitz-mcp

[mcp_servers.blitz]
command = "npx"
args = ["-y", "@blitzdev/blitz-mcp"]

gemini mcp add blitz npx -- -y @blitzdev/blitz-mcp

{
  "mcpServers": {
    "blitz": {
      "command": "npx",
      "args": [
        "-y",
        "@blitzdev/blitz-mcp"
      ]
    }
  }
}

Embed

Show Blitz in a README or on your site. Each embed links to this page, uses the server’s own install command, and sets no cookies. How embeds work

The card, the iframe and the JSON are in English. Add ?lang=it, fr, de or es to their address for another language.

README badge Website card iframe JSON AI prompt

README badge

Markdown

[![Blitz on mcp.tc](https://mcp.tc/i/blitz/badge.svg)](https://mcp.tc/i/blitz)

HTML

<a href="https://mcp.tc/i/blitz"><img src="https://mcp.tc/i/blitz/badge.svg" alt="Blitz on mcp.tc" height="20"></a>

It follows the reader’s light or dark mode. Add ?theme=light or ?theme=dark to fix it, or ?style=compact to show the mark without the word.

Website card

HTML

<script src="https://mcp.tc/w/blitz.js" async></script>

The card appears where the tag is. Add data-theme="dark" or data-size="compact" to the tag to change it. The file holds everything it needs, so it makes no other requests and sets no cookies.

iframe

HTML

<iframe src="https://mcp.tc/embed/blitz" title="Blitz on mcp.tc" width="420" height="200" loading="lazy" allow="clipboard-write" style="border:0;border-radius:8px;max-width:100%"></iframe>

Use it on pages that don’t allow scripts. Add ?theme=light or ?theme=dark to the address to fix the colors.

JSON

The listing as data for your own pages and tools: name, tagline, install command, tools and the “Add to” links. Any site can read it (CORS is open).

https://mcp.tc/i/blitz.json

What each field means

AI prompt

Paste this into an AI coding assistant, such as Claude Code or Cursor, and it adds the Blitz card to your site.

Markdown

Add the mcp.tc card for Blitz, an MCP server, to my website. It is one static script: no build step, no package to install, no cookies.

Put this tag where the card should appear. The card renders right before it:

```html
<script src="https://mcp.tc/w/blitz.js" async></script>
```

To show the card somewhere else, put this placeholder there and load the same script once, for example before `</body>`. Keep the link inside: visitors without JavaScript see it.

```html
<div data-mcptc="blitz"><a href="https://mcp.tc/i/blitz">Blitz on mcp.tc</a></div>
```

Options:
- `data-theme="light"` or `"dark"` on the tag or the placeholder fixes the colors. Without it, the card follows the visitor’s light or dark mode.
- `data-size="compact"` gives a smaller card without the tagline.
- The CSS variable `--mcptc-max-width` on the placeholder or a parent sets the width (default `520px`).
- `?lang=` on the script URL sets the card’s language: `en`, `it`, `fr`, `de` or `es`.

If the site has a Content Security Policy, allow `script-src https://mcp.tc` and `img-src data:` (the icon is inline).

For a README or other Markdown docs, use the badge instead:

```markdown
[![Blitz on mcp.tc](https://mcp.tc/i/blitz/badge.svg)](https://mcp.tc/i/blitz)
```

Reference: https://mcp.tc/embed

Change history

This server runs on your computer, so we follow its npm package: each new version shows up here, with edits by its owner.

1. 6 Oct 2026, 21:22 UTC, Automatic check

   Tracking started: version 1.0.26.

FAQ