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mcp

by @extensiondev / v10.9.0

Build, run, inspect, and publish browser extensions from any MCP client. 30 tools, 11 browsers.

Install

npm / stdio

npx -y @extension.dev/mcp

Client config (Claude Desktop, Cursor, Windsurf and most MCP clients)

{
  "mcpServers": {
    "io-github-extensiondev-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@extension.dev/mcp"
      ]
    }
  }
}

Source: official MCP Registry record · registry name io.github.extensiondev/mcp · published 2026-08-21 · updated 2026-08-21. Not an endorsement; review the code before connecting it to anything sensitive.

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