Beacon

Browser world model agent — observe, ground, act

Beacon gives any MCP client (Cursor, Claude Code, Claude Desktop, and others) real hands in Chrome. Instead of guessing “click the blue Submit button,” Beacon exposes the page as a list of controls with stable IDs. The same ID you see in observe is the ID you use in click, type, and run. Pages change; labels duplicate; your agent still hits the right control. WHAT YOU GET • Stable control IDs on every observe dump—one id per interactive element • MCP tools: observe, click, type, press, scroll, navigate, run, and more • Multi-step run executes a sequence without an LLM between each step • Works with your existing Chrome logins—Beacon does not replace site passwords • Extension holds the browser session; https://mcp.trybeacon.space relays MCP to your Chrome over a secure WebSocket • Optional (beta): hosted chat in the side panel on the same relay—trial credits on your account; not required for MCP HOW IT WORKS Install this extension and sign in at trybeacon.space Create an account and copy your one-time MCP key Add Beacon to your MCP client config (Bearer auth on https://mcp.trybeacon.space/mcp) Link the extension to your account and confirm Connected / Ready in the side panel Call observe from your agent, then act using the returned ids (run can batch steps; navigation can open or reuse tabs without you staying on that tab) WHO IT’S FOR Developers who want browser automation that survives real DOMs—not brittle “click by visible text” scripts. Power users automating forms, internal tools, and repetitive web workflows. WHAT BEACON IS NOT • Not a general autopilot for the entire web • Not a replacement for your MCP client—MCP is the primary path; side panel chat is optional • Not useful without the extension connected—MCP needs your browser online and linked SECURITY & PRIVACY • MCP keys are minted at signup; we store a hash, not the secret • Account passwords are hashed with bcrypt • The relay does not log you into banks, email, or apps—you stay logged in as usual in Chrome • Page content is sent through the relay only when your agent (or you, in hosted chat) invokes tools—not sold for ads or profiling • Rotate your key anytime from your account if it leaks GET STARTED Sign up at https://www.trybeacon.space — paste one key into your MCP config, install this extension, link your account, and run your first observe. Support: https://www.trybeacon.space/feedback