Token-first headless browser for AIs. Extracts a tiny semantic graph, cutting HTML bloat by 95%.
Substrate-browser is an MCP integration. Token-first headless browser for AIs. Extracts a tiny semantic graph, cutting HTML bloat by 95%.
The published npm package is substrate-browser, version 2.0.2. Its declared MCP transport is stdio.
The package declares SUBSTRATE_PROXY: Optional egress proxy URL (http/socks) to route all Chromium traffic through, mitigating SSRF and DNS rebinding risks.; SUBSTRATE_VIEWPORT_WIDTH: Browser viewport width in pixels (Default: 1280); SUBSTRATE_VIEWPORT_HEIGHT: Browser viewport height in pixels (Default: 800).
Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.
View the publisher’s registry entry · Project repository. This profile uses version 2.0.2 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.
Browse related browser automation MCP servers for tools that cover the same kind of work.
| Variable | Description | Required |
|---|---|---|
| SUBSTRATE_PROXY | Optional egress proxy URL (http/socks) to route all Chromium traffic through, mitigating SSRF and DNS rebinding risks. | Optional |
| SUBSTRATE_VIEWPORT_WIDTH | Browser viewport width in pixels (Default: 1280) | Optional |
| SUBSTRATE_VIEWPORT_HEIGHT | Browser viewport height in pixels (Default: 800) | Optional |
Use Microsoft’s Playwright MCP server to navigate pages, inspect accessibility snapshots, fill forms and capture browser screenshots.
The original Chromium automation reference server — simple, screenshot-driven browser control.
Browser MCP server: budgeted page reads, honest unread accounting, structured extraction.
Automates browser interactions and enables Large Language Models (LLMs) to interact with web pages through Playwright and Chrome DevTools Protocol
Ask the human for API keys in a browser page and write them to .env. The model only sees key names.
Just want it in ChatGPT or Claude.ai in your browser? Get the Chrome Extension instead.