How to Use the E2B MCP in Cursor

Q: How do I install the E2B MCP server in Cursor?

Add the server definition to your .cursor/mcp.json file in your project root. Enable Agent mode in the chat interface, and the editor will automatically discover the sandbox tools.

Q: Can the Cursor agent reuse an active E2B sandbox?

Yes, the agent can call listsandboxes to find active environments. It can then run subsequent commands inside that specific VM instead of creating a new one.

Execute generated code in secure E2B sandboxes directly from the Cursor Agent without risking your codebase.

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Connect E2B MCP to Cursor

Create your Vinkius account to connect E2B 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 E2B with Cursor

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Execute generated code via the Cursor MCP Server

`create_sandbox` lets the Cursor Agent spin up a fresh Firecracker VM in 150 milliseconds to run the code it just generated in your editor. The agent executes files within this secure boundary instead of testing code directly on your local codebase. You see the real-time execution output right inside the Cursor sidebar. If a generated script loops infinitely, the 300-second automatic timeout cuts the process before it slows down your editor.

Tear down active VMs directly from your editor

Invoke `kill_sandbox` to destroy the active VM and delete its workspace files immediately after Cursor finishes a test run. The editor coordinates this cleanup to keep your project directory free of temporary build artifacts. This direct integration keeps your Cursor coding session highly responsive. You never have to manually run docker kill commands to clean up your workspace.

Track your active VMs in the Cursor sidebar

Use `list_sandboxes` to get a real-time inventory of active microVMs associated with your Cursor project. Your editor agent reads this metadata to determine if it can reuse an active environment for subsequent edits. Having this visibility in Cursor prevents you from running redundant sandboxes. You keep your E2B API usage efficient while writing code.

Setup guide

Set up E2B 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 E2B 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 E2B transactions." If the MCP tools are loaded correctly, Cursor will call the E2B tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

{
  "mcpServers": {
    "e2b-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 E2B. 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 E2B MCP in Cursor

Add the server definition to your `.cursor/mcp.json` file in your project root. Enable Agent mode in the chat interface, and the editor will automatically discover the sandbox tools.

Yes, the agent can call `list_sandboxes` to find active environments. It can then run subsequent commands inside that specific VM instead of creating a new one.

Your agent can choose Python, Node, or base Linux templates during the `create_sandbox` call. This gives you instant access to pre-configured packages for testing code.

Every sandbox has a default 300-second lifespan. If a script in Cursor exceeds this limit, the MCP server kills the VM to prevent hanging processes.

All code snippets and API keys sent to the sandbox are isolated in an ephemeral, zero-trust microVM. E2B enforces strict network rules to prevent unauthorized outbound traffic, and we never write your proprietary code to persistent storage.

Use it with your favorite AI tools

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

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