Deploy in 60 seconds. No infrastructure changes.

Hands, brains, and memory for AI agents.

Install one CLI on a machine and use that PC from anywhere. Bring your own model keys. Keep context that lasts. Memory works with any account — the CLI is what unlocks remote access.

Install flexx CLICreate free account

A free account unlocks Memory instantly. Install the CLI to reach a machine. Add your keys to power the Agent. Read the docs →

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

Get started

Three steps. Start wherever you are.

Each step unlocks a different part of flexx. You don't need all three to begin.

01

Install the CLI on a machine

One command on the machine you want to reach. This is the step that turns a PC into a remote you can use from anywhere — no VPN, no port forwarding.

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

Remote access: that machine, from anywhere

02

Run flexx setup

Signs you in, registers the machine, and prints your MCP config. flexx connect (or flexx service install for always-on) brings it online.

flexx setup

Remote + Memory, live in the dashboard and your AI tools

03

Add your own model keys

Paste an Anthropic, OpenAI, OpenRouter, or any OpenAI-compatible key, name the models you want, and set a budget. No lock-in.

Dashboard → Models → Connect a provider

Router + Flexx Agent, powered by your models

Memory works right now. Create a free account, connect any MCP client, and the memory tools are available — no install, no machine required. Remote tools only appear once the CLI is connected.

Start with Memory

Four products, one system

Use them together in Flexx Agent, or one at a time

Every piece stands on its own as an MCP server for the tools you already use. Together, they power Flexx Agent.

Remote

Give any AI real hands on your machine

MCP server for Cursor, Claude, Grok, or any client. AI agents run code, edit files, and execute commands on your machine — zero inbound ports.

Needs
Install the CLI on the machine you want to reach

Router

One place for every model

Bring your own models and providers, set budgets, and use a single OpenAI-compatible endpoint from anywhere — including inside Flexx Agent.

Needs
Add your own provider API keys

Memory

Agents that remember across tools and sessions

A shared knowledge graph over MCP. Store decisions, preferences, and project context once — recall it from any client or from Flexx Agent.

Needs
Nothing — works with any account, no install

Agent

The assistant that uses all three

A unified assistant that already has hands, a model layer, and durable memory — chat, and it acts, remembers, and picks the right model for the job.

Needs
A model — yours, or bring your own keys

Ways to use flexx

Start with what you have today

No machine needed

Memory only

Create a free account and connect any MCP client. The memory tools need no install and no machine — your agents remember decisions, preferences, and project context across every session right away.

Create a free account

After installing the CLI

Remote + Memory

Install flexx on a machine and it becomes reachable from anywhere. Point Cursor, Claude, or any MCP client at one endpoint to run code, edit files, and use that PC remotely.

Install the CLI

After adding your keys

The full system

Add your own provider keys and Flexx Agent gets hands, memory, and the models you choose — or call the router's OpenAI-compatible endpoint from your own code.

Open the dashboard

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

Reach a machine in under two minutes

Install, register, connect. After this, that PC is usable from anywhere. No network configuration required.

01

Install the CLI

Run one command on the machine you want to reach — macOS, Linux, or Windows. A single Go binary, zero dependencies.

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

Puts the flexx binary on your machine

02

Run setup

flexx setup signs you in, registers this machine, and prints the MCP config for your AI tool.

flexx setup

Your machine appears in the dashboard

03

Connect

Start the daemon and the machine goes online. Reach it from anywhere — MCP, SSH, or a tunnel.

flexx connect

Remote tools go live

Router · bring your own models

Your keys. Your models. One endpoint.

Add a provider key in the dashboard and every model it can reach shows up in one place. Flexx Agent uses them, and your own tools can call the router too. Provider keys stay server-side — they never touch your client.

  • Anthropic
  • OpenAI
  • OpenRouter
  • Groq
  • Any OpenAI-compatible endpoint
Read the models guide
bring your own models
# In Flexx Agent — pick a model, nothing else to wire up.
# Every registered model appears in the session model picker.

# From your own code — point any OpenAI *or* Anthropic
# client at your router endpoint (Dashboard → Models):

OPENAI_BASE_URL=https://<your-router>/v1
OPENAI_API_KEY=flexxr_...      # a router key you create

# /v1/chat/completions  → OpenAI wire format
# /v1/messages          → Anthropic wire format
# Per-key budgets + allowlists are enforced before
# any upstream call.

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 gives your AI tool Remote and Memory. Memory tools work as soon as you connect; Remote tools appear once a machine with the CLI is online. Toggle which capabilities are exposed from your dashboard at any time.

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

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

FAQ

Frequently asked questions

Can I use flexx without installing anything?

Yes — for Memory. Create a free account and connect any MCP client; the memory tools need no install and no machine. Remote tools (files, shell, screenshots, tunnels) only become available after you install the flexx CLI on a machine and connect it. Flexx Agent can chat without a machine, but it needs a connected machine to act on one.

What do I need to get started?

Just a free account to use Memory. To use a machine remotely, install the flexx CLI on it (one command), then run flexx setup and flexx connect — that machine is then reachable from anywhere. To power Flexx Agent with your own models, add a provider API key in the dashboard.

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.

What is the Router, and do I have to use flexx's models?

No. Router is a bring-your-own-model gateway. Add an Anthropic, OpenAI, OpenRouter, Groq, or any OpenAI-compatible key in the dashboard, set per-key budgets, and use those models inside Flexx Agent — or point your own code at the router's OpenAI- and Anthropic-compatible endpoints.

What's the difference between using Remote/Memory directly and using Flexx Agent?

Remote, Router, and Memory are independent MCP servers you can plug into Cursor, Claude, or any client today. Flexx Agent is a unified assistant that already has all three connected, so you don't have to configure each one separately.

Install the CLI

Install once. Use that machine anywhere.

Run this on the machine you want to reach. Works on macOS, Linux, and Windows — one binary, zero dependencies.

terminal
$ curl -fsSL https://cli.flexx.dev/install.sh | sh
Windows (PowerShell): irm https://cli.flexx.dev/install.ps1 | iex
  1. 2. Connect it to your account: flexx setup
  2. 3. Bring it online: flexx connect — or flexx service install for always-on

Only need Memory? Skip all of this — create a free account and connect any MCP client. No install, no machine required.

Create Your Free Account

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