# WorkerKit MCP server

> Provides an API client and tool registry for managing authenticated and anonymous tools, workers, and file uploads within the WorkerKit ecosystem.

- Repository: https://github.com/workerkit/core
- Page: https://hostedmcp.org/servers/workerkit/core
- Transport: stdio
- Stars: 2
- License: MIT

## Install

### Claude Code

```sh
claude mcp add core -- npx -y @workerkit/core
```

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

```json
{
  "mcpServers": {
    "core": {
      "command": "npx",
      "args": [
        "-y",
        "@workerkit/core"
      ]
    }
  }
}
```

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

```json
{
  "servers": {
    "core": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@workerkit/core"
      ]
    }
  }
}
```

### VS Code CLI

```sh
code --add-mcp '{"name":"core","type":"stdio","command":"npx","args":["-y","@workerkit/core"]}'
```

### Claude Desktop (`claude_desktop_config.json`)

```json
{
  "mcpServers": {
    "core": {
      "command": "npx",
      "args": [
        "-y",
        "@workerkit/core"
      ]
    }
  }
}
```

### Codex

```sh
codex mcp add core -- npx -y @workerkit/core
```

### Codex config.toml (`~/.codex/config.toml`)

```toml
[mcp_servers.core]
command = "npx"
args = ["-y", "@workerkit/core"]
```

### Gemini CLI

```sh
gemini mcp add -s user core npx -- -y @workerkit/core
```

### Gemini settings.json (`~/.gemini/settings.json`)

```json
{
  "mcpServers": {
    "core": {
      "command": "npx",
      "args": [
        "-y",
        "@workerkit/core"
      ]
    }
  }
}
```

## FAQ

### How do I install the WorkerKit core package?

You can install it using npm with the command `npm install @workerkit/core`.

### What are the Node.js requirements for this server?

The package requires Node.js version 22 or higher.

### Can I upload files to a hosted language worker?

Yes, you can upload up to three files (PDF, PNG, or JPEG) per run, with a limit of 7 MiB per file and 15 MiB in total, using the `uploadWorkerFile` function.

### How does the tool registry handle updates?

Tool definitions and schemas are authored by the WorkerKit backend, and the core distributes a generated, versioned copy to consumers.