Substrate Browser MCP server

Read from the package source without running it. The installed server may list more.

• click

  Click element by numeric ID from last response. Auto-scrolls if needed. Returns updated element graph.

• get_current_url

  Get the current page URL.

• go_back

  Navigate back in browser history.

• go_forward

  Navigate forward in browser history.

• navigate

  Load a URL. Returns a compressed page graph: {t:title, u:url, s:[scrollY,scrollHeight,viewportH], n:count, e:elements}.

• press_key

  Press a keyboard key. Use for Escape (close modals), Enter (submit), Tab (navigate fields), arrow keys, etc. Supports modifiers: Control+key, Shift+key, Alt+key, Meta+key. Example: press_key Escape, press_key Control+Backspace, press_key ArrowDown.

• screenshot

  Capture a screenshot of the current viewport.

• scroll

  Scroll the viewport up or down by 80%.

• select_option

  Select an option in a dropdown (role sel) by its value. Use the value from state.v or state.opts.

• type_text

  Type text into an input element by numeric ID. Auto-clears field first.

• Code scan11 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitylocal package, no credentials required12/15
• Maintenancelast push 19 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Substrate Browser: common questions

Is Substrate Browser MCP server safe?

Yes, by our scan: it is graded A (92/100). Read the Substrate Browser safety report

How do I install Substrate Browser?

It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.

Does Substrate Browser need an API key?

No secret keys are declared. It reads 3 settings from the environment.

Is Substrate Browser maintained?

The last commit was 19 days ago (2026-09-01). The latest release is v2.0.2.

What can I use instead of Substrate Browser?

Servers from other publishers that do the same job: ZeroDOM MCP server, Browser Automation MCP server and walkerOS Source Browser MCP server. Compare all Substrate Browser alternatives.