# Fly Io (MCP server)

> Fly Io is an MCP server that adds cloud and DevOps tools to AI assistants such as Claude Desktop, Claude Code and Cursor. MCP server for managing Fly.io machines, apps, logs, and Docker images. It has 81 GitHub stars, is released under the MIT license and runs locally with npx -y fly-io-mcp-server.

MCP server for managing Fly.io machines and applications. This server provides tools for CRUD operations on Fly.io apps and machines (VMs).

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/pulsemcp/mcp-servers |
| GitHub stars | 81 |
| License | MIT |
| Language | TypeScript |
| Transport | stdio |
| Packages | npm: fly-io-mcp-server |
| Remote URL | none |
| Needs API key | yes |
| Official | yes |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Cloud & DevOps |
| Latest release | monorepo-latest-placeholder@0.0.0 (Jul 3, 2025) |
| Last commit | Aug 30, 2026 |
| MCP registry name | com.pulsemcp/fly-io |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "fly-io": {
      "command": "npx",
      "args": [
        "-y",
        "fly-io-mcp-server"
      ],
      "env": {
        "FLY_IO_API_TOKEN": "your-value"
      }
    }
  }
}
```

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

### Claude Code

```sh
claude mcp add --env FLY_IO_API_TOKEN=your-value --transport stdio fly-io -- npx -y fly-io-mcp-server
```

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

```json
{
  "mcpServers": {
    "fly-io": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "fly-io-mcp-server"
      ],
      "env": {
        "FLY_IO_API_TOKEN": "your-value"
      }
    }
  }
}
```

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

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

```json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "fly_io_api_token",
      "description": "FLY_IO_API_TOKEN",
      "password": true
    }
  ],
  "servers": {
    "fly-io": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "fly-io-mcp-server"
      ],
      "env": {
        "FLY_IO_API_TOKEN": "${input:fly_io_api_token}"
      }
    }
  }
}
```

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

## Environment variables

- `FLY_IO_API_TOKEN` (secret) (required): API token for Fly.io authentication.
- `FLY_IO_APP_NAME`: Scope server to a single app (disables app management tools).
- `ENABLED_TOOLGROUPS`: Comma-separated tool groups to enable (readonly, write, admin, apps, machines, logs, ssh, images, registry).
- `SKIP_HEALTH_CHECKS`: Skip API validation at startup.
- `DISABLE_DOCKER_CLI_TOOLS`: Disable Docker-based registry tools.

## Tools

- `list_apps`: readonly, write, admin
- `get_app`: readonly, write, admin
- `create_app`: write, admin
- `delete_app`: admin
- `list_machines`: readonly, write, admin
- `get_machine`: readonly, write, admin
- `get_machine_events`: readonly, write, admin
- `create_machine`: write, admin
- `update_machine`: write, admin
- `delete_machine`: admin
- `start_machine`: write, admin
- `stop_machine`: write, admin
- `restart_machine`: write, admin
- `suspend_machine`: write, admin
- `wait_machine`: write, admin
- `get_logs`: readonly, write, admin
- `machine_exec`: write, admin
- `show_image`: readonly, write, admin
- `list_releases`: readonly, write, admin
- `update_image`: write, admin
- `push_new_fly_registry_image`: write, admin
- `pull_fly_registry_image`: readonly, write, admin
- `check_fly_registry_image`: readonly, write, admin

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