# REA (MCP server)

> REA is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Reverse engineer anything from your terminal or agent with one CLI and MCP server. It has 10,215 GitHub stars, is released under the MIT license and runs locally with npx -y rea-agents.

See a feature you like. Understand how it works, down to the binary level. See a feature in an app that you want in your own product? Ask your agent to investigate it with REA. It can inspect the app without its source code, explain how the feature works, show the evidence, and build a version for your project.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/morluto/rea |
| GitHub stars | 10,215 |
| License | MIT |
| Language | TypeScript |
| Transport | stdio |
| Packages | npm: rea-agents |
| Remote URL | none |
| Needs API key | no |
| Official | no |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Developer tools |
| Latest release | rea-agents-4.1.0 (Oct 6, 2026) |
| Last commit | Oct 7, 2026 |
| MCP registry name | io.github.morluto/rea |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "rea": {
      "command": "npx",
      "args": [
        "-y",
        "rea-agents"
      ]
    }
  }
}
```

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

### Claude Code

```sh
claude mcp add --transport stdio rea -- npx -y rea-agents
```

### Cursor (.cursor/mcp.json)

```json
{
  "mcpServers": {
    "rea": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "rea-agents"
      ]
    }
  }
}
```

Project file; use ~/.cursor/mcp.json to enable it in every project.

### VS Code (.vscode/mcp.json)

```json
{
  "servers": {
    "rea": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "rea-agents"
      ]
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

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