Blueprint MCP monorepo - MCP server and browser extensions
Blueprint MCP MCP server is a locally run integration for AI assistants that speak the Model Context Protocol. Blueprint MCP monorepo - MCP server and browser extensions.
An MCP (Model Context Protocol) server that lets AI assistants control your actual browser (Chrome, Firefox, or Opera) through a browser extension. Unlike headless automation tools, this uses your real browser profile with all your logged-in sessions, cookies, and extensions intact.
The server ships on npm as @railsblueprint/blueprint-mcp, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.
Once Blueprint MCP is connected, these are the calls the assistant has available:
Navigation — The Navigation tool exposed by this serverInteraction — The Interaction tool exposed by this serverAdvanced — The Advanced tool exposed by this serverPrerequisites — The Prerequisites tool exposed by this serverSetup — The Setup tool exposed by this serverTesting — The Testing tool exposed by this serverYou will need one environment variable: AUTH_BASE_URL. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Plenty of browser automation servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Blueprint MCP's toolset — Navigation, Interaction, Advanced and 3 more — is a fair guide to whether it matches your workflow. It is maintained by railsblueprint; worth a glance at recent repository activity before you build anything load-bearing on it.
We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.
| Tool | What it does |
|---|---|
| Navigation | The Navigation tool exposed by this server. |
| Interaction | The Interaction tool exposed by this server. |
| Advanced | The Advanced tool exposed by this server. |
| Prerequisites | The Prerequisites tool exposed by this server. |
| Setup | The Setup tool exposed by this server. |
| Testing | The Testing tool exposed by this server. |
{
"mcpServers": {
"blueprint": {
"command": "npx",
"args": ["-y", "@railsblueprint/blueprint-mcp"],
"env": {
"AUTH_BASE_URL": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| AUTH_BASE_URL | Endpoint or connection string the server talks to. | Yes |
Microsoft's official browser automation server — drive a real browser through the accessibility tree, no screenshots needed.
Industrial-strength web extraction — render, scrape, crawl and search entire sites into clean markdown.
The original Chromium automation reference server — simple, screenshot-driven browser control.
Give your coding agent the full DevTools toolbox: traces, network, console, heap snapshots and Lighthouse.
Puppeteer-powered browser control that drives pages from the accessibility tree instead of pixels.
Cloud browsers for AI agents — automation sessions that run in Browserbase's fleet, not on your machine.