Substrate Browser MCP Server
by manuelinuxkrio.github.manuelinuxkr/substrate-browserv2.0.2
Token-first headless browser for AIs. Extracts a tiny semantic graph, cutting HTML bloat by 95%.
context tax
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security
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cold start
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freshness
Maintained38d ago
Install Substrate Browser MCP server
Install in Claude Code
claude mcp add substrate-browser -- npx -y substrate-browserInstall in Cursor
{
"mcpServers": {
"substrate-browser": {
"command": "npx",
"args": [
"-y",
"substrate-browser"
]
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"substrate-browser": {
"command": "npx",
"args": [
"-y",
"substrate-browser"
]
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"substrate-browser": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"substrate-browser"
]
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"substrate-browser": {
"command": "npx",
"args": [
"-y",
"substrate-browser"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| 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) |
Freshness
Maintained — last maintenance signal 38d ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-09-01 · 38d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-09-01 · 38d ago · official registry · v2.0.2
FAQ
›How do I install the Substrate Browser MCP server in Claude Code?
Run: claude mcp add substrate-browser -- npx -y substrate-browser. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Substrate Browser require an API key?
No required environment variables are declared in its published metadata.
›Can I use Substrate Browser as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is Substrate Browser in the official MCP registry?
Yes, as io.github.manuelinuxkr/substrate-browser.
Alternatives to Substrate Browser
Other browser automation MCP servers.