Blitz

Name: Blitz
Author: blitzdotdev

MCP tools inside a native macOS app for preparing and submitting iOS and macOS apps to App Store Connect

By blitzdotdev Swift Local · stdio Developer tools

GitHub npm Website

28 popularity score ★ 1.8k ↓ 58/wk

Connect your client

Local (npm)

Add in one click

Add to Cursor Add to VS Code Add to LM Studio Add to Goose

Opens the app, which asks before it adds the server.

Or add it by command or config

Claude CodeTerminal

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

Claude Desktopclaude_desktop_config.json

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

Cursor~/.cursor/mcp.json

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

VS Code.vscode/mcp.json

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

Codex~/.codex/config.toml

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

Gemini CLITerminal

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

What it does

Blitz is a SwiftUI desktop app for macOS that walks an app through Apple's release process: store listing text, screenshots, in-app purchases and subscriptions, pricing, code signing, building and uploading, and finally the Submit for Review step. The MCP server is built into the app. While Blitz is running it listens on 127.0.0.1, and the npm package @blitzdev/blitz-mcp is only a small stdio bridge: it checks that /Applications/Blitz.app and the script ~/.blitz/blitz-mcp-bridge.sh exist, then hands every request to the running app.

Through the server an assistant can open, create or import Blitz projects, pick and boot a simulator, read the structured state of any tab instead of taking screenshots, fill App Store Connect form fields per locale, stage and sync screenshot tracks (ten slots per device family), create a new version, create IAPs and auto-renewable subscriptions with a review screenshot, set the price, read Apple's rejection feedback, set up signing, archive an IPA and upload it to App Store Connect or TestFlight.

The README speaks of about 35 tools and lists simulator touch, swipe and live capture among the app's features. The registry file at v1.0.35 (src/services/mcp/MCPRegistry.swift) registers 37 tools, and none of them taps or swipes in the simulator. The only simulator tools list devices and select-and-boot one. Each tool is also put in a category there. Navigation and query tools run straight away. Tools that change projects, settings, store forms, screenshots, submissions or the build pipeline fall in mutation categories, and the app's approval-flow design doc says those wait for an Approve or Deny prompt in the app.

What it needs

Runtime	Node.js

A Mac with macOS 14 or later and the Blitz app installed at /Applications/Blitz.app (download from blitz-mac.com or the GitHub releases), launched once so it writes ~/.blitz/blitz-mcp-bridge.sh, and running while the server is used. Node.js for npx. An Apple Developer account with an App Store Connect API key (issuer ID and .p8 file); some calls also need an Apple ID web sign-in in the app. Xcode for the signing and build tools.

Limits

macOS only: the bridge exits unless /Applications/Blitz.app and ~/.blitz/blitz-mcp-bridge.sh exist, and it does nothing unless the app is running. The 37 tools at v1.0.35 cannot tap, swipe or record the simulator; they only list devices and select-and-boot one. Screenshot tracks hold slots 1 to 10. asc_create_iap and asc_create_subscription require a review screenshot and add only an en-US localization. The npm bridge on the registry is version 1.0.26 while the app is at v1.0.35; the tools come from the app's version. store_listing_switch_localization is marked deprecated in favour of app_information_switch_localization.

Who it suits

Developers on a Mac who ship iOS or macOS apps and want an assistant such as Claude Code, Codex or Cursor to do the App Store Connect paperwork, including IAPs, screenshots, signing, upload and submission, with a click-to-approve prompt in a desktop app for changes. It is not a fit on Linux, Windows or a headless CI machine, since everything runs through the GUI app. It is also not a fit for driving the simulator by touch, which these tools do not do. It writes to a live App Store Connect account, so it suits people who are ready to review each approval prompt.

Tools 37

app_get_state: Report the open project, the active tab and whether streaming is on
nav_switch_tab: Move the app's sidebar to another tab
nav_list_tabs: List the app's tabs and their groups
project_list: List Blitz projects
project_get_active: Show details of the project that is open
project_open: Open a project by its ID
project_create: Create a new Blitz project
project_import: Bring an existing project in from a path on disk
project_close: Close the open project
simulator_list_devices: List simulators and connected physical devices
simulator_select_device: Pick a simulator by UDID and boot it
settings_get: Read the app's settings
settings_update: Change app settings
settings_save: Write the current settings to disk
get_blitz_screenshot: Capture an image of the Blitz main window
get_rejection_feedback: Return Apple's cached review rejection details for a version
get_tab_state: Return a tab's form values, readiness, versions, builds and locales as data
asc_set_credentials: Pre-fill the App Store Connect API key form for the user to confirm
asc_fill_form: Set one or more App Store Connect form fields, per locale where needed
app_information_switch_localization: Reload app-information locales and switch to one
store_listing_switch_localization: Old alias of app_information_switch_localization
screenshots_switch_localization: Reload screenshot locales and load one locale's tracks
screenshots_put_track_slot: Place an image file into a screenshot slot from 1 to 10
screenshots_remove_track_slot: Clear one screenshot slot
screenshots_reorder_track: Reorder the ten slots of a screenshot track
screenshots_save: Sync staged screenshot changes to App Store Connect
asc_select_version: Choose an App Store version by ID or version string
asc_create_version: Create a new App Store version, optionally copying metadata and attaching a build
asc_open_submit_preview: Check what is missing and open the Submit for Review dialog
asc_create_iap: Create an in-app purchase with price, en-US text and review screenshot
asc_create_subscription: Create an auto-renewable subscription, with its group if needed
asc_web_auth: Open the Apple ID sign-in window to renew the web session
asc_confirm_created_app: Poll App Store Connect for a newly created app record and confirm it
asc_set_app_price: Set the app's price now or from a future date
app_store_setup_signing: Register the bundle ID, create certificates and profiles, and configure Xcode
app_store_build: Archive the Xcode project and export a signed IPA
app_store_upload: Upload an IPA to App Store Connect or TestFlight

Popularity

28 popularity score

★ 1.8k ↓ 58/wk

GitHub stars, whole repository	1,767	14.2 points
npm downloads, last week	58	14.2 points

It lives in the folder packages/mcp-npm of blitzdotdev/blitz-mac, which holds more than this server. Its stars are the whole repository's, so in the score they never count for more than its own downloads.

Measured 2026-11-07. How the score works.

Where it is published

Code	blitzdotdev/blitz-mac/packages/mcp-npm ★ 1.8k, the whole repository
npm	@blitzdev/blitz-mcp 1.0.26, 2026-03-20

What it can reach

Runs	On your machine
Reaches	Your account at a service, Files on your machine, The internet, Your code
Changes things	Yes: it can write, send, create or delete
Sign-in	Account credentials
Licence	Apache-2.0 (npm)
Last code change	2026-03-20

The server code runs on your own Mac inside the Blitz app, which binds its MCP endpoint to 127.0.0.1; the npm package only forwards stdio to it. Tools change a live App Store Connect account: store text, prices, IAPs, subscriptions, screenshots, new versions, signing certificates and profiles, build uploads and the review submission dialog. They read image and project files from local paths and run Xcode archive and export. Sign-in uses an App Store Connect API key plus, for some calls, an Apple ID web session whose cookies are saved to ~/.blitz/asc-agent/web-session.json. Official release builds send anonymous usage telemetry, including MCP tool usage events, with a device ID; source builds have it off.

Over time

GitHub stars, whole repository 1.8k +11 (+1 %)

1.8k1.8k

14 Oct 20267 Nov 2026

npm downloads a week 58 +45 (+346 %)

1734

30 Mar 20267 Nov 2026

Before the site measured it, read from npm's daily download counts.

Popularity score 28 −23 (−45 %)

5119

14 Oct 20267 Nov 2026

What is rising across the directory

Sources

Page checked 2026-10-15.

Badge for your README

Shows this server's rank in its category, and stars for a server that runs on your machine. It updates every hour.

MarkdownREADME.md

[![Blitz on EveryMCPServer](https://everymcpserver.com/badge/blitz-mac.svg)](https://everymcpserver.com/servers/blitz-mac)

Connect your client

Add in one click

Or add it by command or config

What it does

What it needs

Limits

Who it suits

Tools 37

Similar servers

Apple Doc MCP

Mobile MCP

OpenComputerUse

tapflow

mcptoon

REA