google-flow-mcp

MCP server that generates images and video on Google Flow through browser automation, so you can use your own Google AI Pro subscription instead of paying per-credit services. Ships with a Claude Code skill.

Validated end-to-end: images (Nano Banana / Imagen) and video (Veo 3.1 / Omni Flash) are generated in a real Flow project and downloaded to disk.

Adapted and hardened for the current agent-first Flow UI (and Windows) from TMSSS05/google-flow-browser-mcp.

What it does

Playwright connects over the Chrome DevTools Protocol to a dedicated Chrome that is logged into your Google account. It drives Flow's agent to generate media and downloads the result through the authenticated session. No API keys, no password handling — it uses your existing browser session.

Tools (17): flow_connect, flow_status, flow_account_check, flow_discover_ui, flow_generate_image, flow_generate_video, flow_download_latest, character/scene tools, flow_use_grid_architect, flow_screenshot, flow_queue_status, …

Related MCP server: google-flow-mcp

⚠️ Terms of Service

This is unofficial browser automation. There is no official Google API for Flow. The launcher starts Chrome directly so navigator.webdriver is false, which is an explicit anti-bot measure. Automating Google properties can violate Google's Terms of Service and may put your account at risk. Use at your own risk, on your own account.

Requirements

• Node.js ≥ 18

• Google Chrome (Chrome 149+ needs Playwright ≥ 1.61.1, already pinned)

• A Google account with access to Flow (Google AI Pro recommended)

Setup

npm install
cp config/flow.config.example.json config/flow.config.json
# edit config/flow.config.json → set expectedAccount and chromeUserDataDir

Start the dedicated Chrome (idempotent — launches only if needed):

powershell -File scripts/ensure-flow-chrome.ps1

First run: in that Chrome window, sign in to your Google account and click "Sign in to Flow" on labs.google (Flow uses a separate sign-in). The session is saved in the dedicated profile and reused.

Register the server with your MCP client (Claude Code, etc.):

{
  "mcpServers": {
    "google-flow": { "type": "stdio", "command": "node", "args": ["<path>/src/index.js"] }
  }
}

Restart the client afterwards (the server loads into memory at startup).

Notes that matter

• Images are effectively free against the monthly Flow credit pool; video consumes credits (Veo 3.1 Lite ~10, Fast ~20, Quality ~100; Omni Flash ~15-30 of ~1000/month). Video shows a credit-confirmation dialog which the server approves.

• Model/duration must be a valid combo or Flow's agent asks for clarification and nothing generates (e.g. Veo 3.1 Lite is 8s-only on the Pro plan; Omni Flash 4-10s).

• Flow is agent-first: prompts are wrapped imperatively so the agent generates directly instead of asking questions.

• The UI language follows your Google account; navigation selectors cover IT/FR/EN.

Claude Code skill

skill/SKILL.md is a ready-to-use skill: drop it in ~/.claude/skills/google-flow-generate/ and Claude will pick the right tool, handle Chrome startup and fallbacks automatically.

License

MIT — see LICENSE.