How to Use the Fly.io MCP in Cursor

Q: How do I configure the Fly.io MCP Server in Cursor?

Create a .cursor/mcp.json file in your project root and add the server details under the mcpServers object. Cursor detects the MCP setup instantly and makes the infrastructure tools available in your next chat session.

Q: How does Cursor handle Fly.io volume management via MCP?

Cursor uses listvolumes to read your current persistent drive attachments. It uses this live data to write precise deployment configurations that match your actual hardware layout.

Generate code that interacts with real Fly.io infrastructure using Cursor Agent mode and MCP.

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Connect Fly.io MCP to Cursor

Create your Vinkius account to connect Fly.io to Cursor and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Fly.io with Cursor

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Claude

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Build real-time scaling code in Cursor

This Fly.io MCP Server connects Cursor directly to your active Fly Machines. When writing auto-scaling scripts, the Cursor editor uses `create_machine` to generate code that provisions physical Firecracker VMs in real-time. Your editor injects actual Fly.io API payloads into your files, completely skipping placeholder mock data. You test the integration by asking Cursor to scale down the fleet, which triggers `stop_machine` on idle Fly Machines. Cursor updates your configuration files based on the actual JSON responses returned by the live Fly.io control plane.

Debug live container states inside Cursor

The `get_machine` tool feeds live Fly Machine diagnostics directly into your Cursor editor. If your local code behaves differently than the Fly.io edge deployment, you ask the Cursor editor to compare the two environments. Cursor pulls the active Docker image digest and current execution state of your Fly Machine to pinpoint the discrepancy. To run deeper runtime checks, Cursor triggers `exec_machine` to execute diagnostic commands inside the active container. The output displays directly in your Cursor sidebar, allowing you to patch the code and deploy the fix immediately.

Map persistent storage volumes within Cursor

The `list_volumes` tool exposes your physical Fly.io NVMe drive configurations directly to your Cursor agent. When writing database migration scripts, the Cursor editor checks which volumes are attached to your Fly.io application. This prevents you from writing code that assumes ephemeral storage is persistent on Fly.io. By checking `get_app` alongside the volume list, the Cursor editor maps your internal Wireguard network ranges. You get precise, environment-aware code in Cursor that correctly addresses your stateful Fly.io database clusters.

Setup guide

Set up Fly.io MCP in Cursor

Prerequisites

Cursor installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP Settings

Go to Cursor Settings → MCP or open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and search for "MCP: Add Server".
2

Add the Fly.io MCP

Cursor will create or open .cursor/mcp.json in your project root. Paste the JSON snippet on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Enable Agent mode

Open Composer (Cmd+I / Ctrl+I) and switch to Agent mode using the dropdown at the top. MCP tools are only available in Agent mode.
4

Verify the connection

Ask Cursor something like "List my recent Fly.io transactions." If the MCP tools are loaded correctly, Cursor will call the Fly.io tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

{
  "mcpServers": {
    "flyio-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Fly.io. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Fly.io MCP in Cursor

Create a `.cursor/mcp.json` file in your project root and add the server details under the `mcpServers` object. Cursor detects the MCP setup instantly and makes the infrastructure tools available in your next chat session.

Yes, when you prompt the agent to scale your app, it executes `create_machine` to provision a new microVM. You retain full control and must approve the tool execution in the chat window.

Cursor uses `list_volumes` to read your current persistent drive attachments. It uses this live data to write precise deployment configurations that match your actual hardware layout.

Yes, the editor runs your migration commands inside the target machine using the `exec_machine` tool. You see the database output directly in the chat panel as it runs.

Your API token is encrypted and stored locally or managed securely via Vinkius. The MCP Server only exposes metadata about your VM states and application names, keeping your underlying source code and environment variables isolated.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

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