Deploy in 60 seconds. No infrastructure changes.

Your machine. Any AI agent. Instant connection.

Let any AI agent run code, edit files, and execute commands on your machine — securely, with zero network configuration.

Get StartedRead the Docs
Zero inbound portsMCP-nativeYour infrastructuremacOS, Linux, Windows
~
$ flexx setup
✓ Authenticated
✓ Remote registered (ID: a7f3c2e1)
Connected to relay.flexx.dev

Architecture

Secure by design. Zero open ports.

Your machine connects outbound to the relay. AI agents connect to the relay. They never talk directly to your machine.

Your Machine

flexx connect

Relay

relay.flexx.dev

AI Agent

MCP / SSH

Outbound WebSocket only — zero inbound ports required on your machine

How it works

Running in under two minutes

From install to AI-ready in under two minutes. No network configuration required.

01

Install flexx

One command installs the CLI on macOS, Linux, or Windows.

curl -fsSL https://cli.flexx.dev/install.sh | sh
02

Run setup

Authenticate and register this machine. Does not start the daemon.

flexx setup
03

Connect

Start the daemon, then paste the MCP endpoint into your AI client.

flexx connect

Features

Everything your AI agent needs

Standard protocols, secure defaults, and the tools your agents actually need.

MCP Protocol

AI agents interact with your machine via standard MCP tools — file ops, shell commands, screenshots, and more.

SSH Access

ssh flexx-myserver — works like any SSH host. Auto-configures ProxyCommand and known hosts.

Localhost Tunneling

Expose dev servers publicly with a single command. No ngrok, no configuration needed.

Screenshots & Vision

AI agents capture webpage screenshots for visual validation and UI testing workflows.

Workspace Safety

Path scoping, command blocklist, and file size limits keep your machine secure by default.

Auto-discovery

flexx detects installed tools automatically: ripgrep, Docker, Jupyter, Chrome, GPUs, and more.

Agent memory

Graph-backed memory for preferences, decisions, and project knowledge. Semantic search and structured recall over MCP — no prompt stuffing.

Use cases

Built for how you actually work

Let AI agents code on your machine

Give Cursor, Claude, or any MCP-compatible agent full access to your dev environment. Run tests, edit files, and iterate — without copying code back and forth.

Access your homelab or workstation from anywhere

Connect to your dev machine from a laptop, tablet, or browser. Secure WebSocket reverse tunnels without port forwarding or VPNs.

Persistent AI Memory & Context

Maintain knowledge graph memory across agent conversations, terminal sessions, and repositories without prompt stuffing.

Pricing

Free to start. No credit card.

Run flexx on your own machine at no cost. Connect your development environment to AI agents in under 60 seconds.

Open Source

$0forever

Self-host flexx on your own infrastructure with complete privacy.

  • Self-hosted relay & daemon
  • Unlimited MCP tools
  • Localhost tunneling
  • Community support
View on GitHub
Recommended

Cloud Free

$0forever

Hosted relay and zero-configuration OAuth for individual developers.

  • Unlimited remotes
  • Knowledge graph memory
  • Encrypted reverse tunnels
  • Audit logs & Vision
Get Started — Free

Team

Custom

For teams collaborating with shared remote development environments.

  • Multi-user organization access
  • Custom tunnel domains
  • SSO integration
  • Dedicated support
Contact Us

MCP Configuration

Works with every MCP-compatible AI tool

One MCP endpoint. Copy the config for your AI tool and start using your machine remotely.

Add to your Cursor MCP settings (Settings → MCP → Add Server)

{
  "mcpServers": {
    "flexx": {
      "url": "https://relay.flexx.dev/v1/mcp"
    }
  }
}

FAQ

Frequently asked questions

What is MCP and how does flexx use it?

MCP (Model Context Protocol) is an open standard that lets AI agents interact with external tools. flexx turns your machine into an MCP server — AI agents like Cursor, Claude, and ChatGPT can read files, run commands, and edit code on your machine through the relay.

Is my machine exposed to the internet?

No. Your machine only makes outbound WebSocket connections to the relay. Zero inbound ports are opened. The relay mediates all communication between AI agents and your machine.

Which AI tools are supported?

Any tool that supports the Model Context Protocol (MCP) works with flexx. This includes Cursor, Claude Desktop, ChatGPT with MCP plugins, OpenAI Codex, and any custom MCP client.

How is authentication handled?

flexx uses OAuth 2.1 with PKCE for MCP connections. When an AI tool connects, it goes through a consent flow where you approve access and choose which machine to connect. You can revoke access anytime from the dashboard.

What tools can AI agents use on my machine?

AI agents can read and write files, execute shell commands, search codebases (via ripgrep), take screenshots (if Chrome is installed), list processes, and more. Available tools are auto-discovered based on what's installed.

Does it work behind a corporate firewall or NAT?

Yes. Because flexx only makes outbound connections, it works behind firewalls, NAT, and most corporate networks without any configuration. No VPN or port forwarding needed.

Is flexx free?

Yes. The free tier includes unlimited remotes, unlimited MCP tools, SSH access, and localhost tunneling. Managed and team tiers with additional features are coming soon.

Does flexx include agent memory?

Yes. flexx ships a graph-backed memory layer. Agents can store and recall decisions, preferences, and project context across sessions and tools — all through the same MCP endpoint.

Which platforms are supported?

flexx runs on macOS (Intel and Apple Silicon), Linux (x86_64 and ARM64), and Windows (x86_64 and ARM64). It's a single Go binary with zero dependencies.

Get started

One command. That's it.

Works on macOS, Linux, and Windows. One binary, zero dependencies.

terminal
$ curl -fsSL https://cli.flexx.dev/install.sh | sh
Windows: irm https://cli.flexx.dev/install.ps1 | iexThen run: flexx setup
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