Substrate b MCP Server: Install & Setup

Install Substrate b in Claude Code

Claude Code

claude mcp add substrate-b -- npx -y substrate-browser

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "substrate-b": {
      "command": "npx",
      "args": [
        "-y",
        "substrate-browser"
      ]
    }
  }
}

Token-first headless browser for AIs. Extracts a tiny semantic graph, cutting HTML bloat by 95%.

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

Run: claude mcp add substrate-b -- npx -y substrate-browser

computer-agent-labs/terminal-use

Lets AI agents drive a real terminal: type, press keys, click, read the screen, take screenshots.

restspace/sitelooper

Record a browser flow once with a model, then compile it to a Playwright spec that needs no model.

krastranseu-lang/klyo-games-mcp

Publish, play-test and fix HTML5 browser games from your AI assistant. Own address, 70% ad share.

blackdiamond-labs/scalebrowser-mcp

Isolated browsers with a persistent identity for AI agents, on your own Windows machine.

maxoperf/mcp

Load & browser performance testing — drive MaxoPerf from your AI agent with your API key.

compscidr/sair

Run Android tests on real phones, or lease one: install, shell, screenshot, logcat.