# @extension.dev/mcp

> @extension.dev/mcp — extensiondev-mcp. Use this tool when you need to streamline browser extension development across multiple browsers, and want to leverage AI-powered interaction for debugging and testing. It provides 30 tools for scaffolding, running, debugging, inspecting, and publishing extensions, accepting inputs such as extension code and browser configurations, and outputting debug logs and extension packages. Ideal for use cases where cross-browser compatibility and automated testing are crucial.

Canonical page: https://skillsregistry.net/skills/extensiondev-mcp  
JSON: https://api.skillsregistry.net/v1/skills/extensiondev-mcp

## Description

Provides 30 MCP tools for browser extension development, including scaffolding, running, debugging, inspecting, and publishing cross-browser extensions. It enables AI agents to interact with live browsers for debugging and development.

## Trust

- **Trust score (0–1):** 0.63
- **Verification tier:** scanned
- **Last scanned:** 2026-08-30

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** browser-automation
- **Updated:** 2026-08-30

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/hyesau0uos)
- **Repository:** <https://github.com/extensiondev/mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "extensiondev-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/extensiondev-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/extensiondev-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt