Build, run, inspect, and publish browser extensions from any MCP client. 30 tools, 11 browsers.
Runs locally over stdio
This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).
Run
npx -y @extension.dev/mcp
MCP client config
{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"@extension.dev/mcp"
]
}
}
}