Extension Dev MCP Server
by extensiondevio.github.extensiondev/mcpv10.11.1
Build, run, inspect, and publish browser extensions from any MCP client. 32 tools, 13 browsers.
context tax
queued
security
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cold start
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freshness
Active2d ago
Install Extension Dev MCP server
Install in Claude Code
claude mcp add extension-dev -- npx -y @extension.dev/mcpInstall in Cursor
{
"mcpServers": {
"extension-dev": {
"command": "npx",
"args": [
"-y",
"@extension.dev/mcp"
]
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"extension-dev": {
"command": "npx",
"args": [
"-y",
"@extension.dev/mcp"
]
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"extension-dev": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@extension.dev/mcp"
]
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"extension-dev": {
"command": "npx",
"args": [
"-y",
"@extension.dev/mcp"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Freshness
Active — last maintenance signal 2d ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-10-08 · 2d ago · GitHub
Latest release
2026-10-08 · 2d ago · GitHub · v10.11.1
Package published
no data · npm/PyPI
Registry entry updated
2026-10-08 · 2d ago · official registry · v10.11.1
FAQ
›How do I install the Extension Dev MCP server in Claude Code?
Run: claude mcp add extension-dev -- npx -y @extension.dev/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Extension Dev require an API key?
No required environment variables are declared in its published metadata.
›Can I use Extension Dev as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is Extension Dev in the official MCP registry?
Yes, as io.github.extensiondev/mcp.
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