Deploying to Freestyle

Deploy RivetKit app to Freestyle.sh, a cloud platform for running AI-generated code with built-in security and scalability.

Freestyle provides built-in security for running untrusted AI-generated code, making it ideal for AI agent applications. Using Rivet, it is easy to deploy your vibe-coded or user-provided RivetKit backends straight to Freestyle.

Freestyle + Rivet

Complete example of deploying RivetKit app to Freestyle.sh.

Setup

Install packages

Install RivetKit and Hono and create your registry:

npm install rivetkit hono

Configure serverless driver

Update your server code to run the registry serverless with Deno.

import { actor, setup } from "rivetkit";

export const counter = actor({
  state: { count: 0 },
  actions: {
    increment: (c, x: number) => {
      c.state.count += x;
      return c.state.count;
    },
  },
});

export const registry = setup({
  use: { counter },
});
registry.start();

import { registry } from "./index";

// Freestyle uses Deno under the hood for web deployments
// @ts-ignore Deno is a Freestyle runtime global
Deno.serve((request: Request) => registry.handler(request));

The Deno.serve API is provided by Freestyle’s runtime environment. The @ts-ignore comment suppresses TypeScript errors for this platform-specific API.

Deploy to Freestyle

Deploy your application to Freestyle with the correct configuration. Create a deployment script or add this to your existing deployment process:

const FREESTYLE_DOMAIN = "my-domain.style.dev"; // Change to your desired Freestyle domain

declare const freestyle: any;
declare const buildDir: string;

const res = await freestyle.deployWeb(buildDir, {
	envVars: {
		FREESTYLE_ENDPOINT: `https://${FREESTYLE_DOMAIN}`,
		RIVET_RUNNER_KIND: "serverless",
		// For self-hosted instances:
		// RIVET_ENDPOINT: "http://127.0.0.1:6420",
		RIVET_ENDPOINT: "api.rivet.dev",
	},
	timeout: 60 * 5, // Increases max request lifetime on the runner
	entrypoint: "server.ts", // File which starts serverless runner
	domains: [FREESTYLE_DOMAIN],
	build: false,
});

Details on buildDir and other settings are available on Freestyle docs.

Run this deployment script to push your application to Freestyle.

Deployment Configuration:

timeout: 60 * 5 - Set timeout to 5 minutes for actor operations - it’s important to keep this high
entrypoint: "server.ts" - Entry point file with your serverless setup
domains - Your Freestyle domain(s)
build: false - Disable build if you’re pre-building your assets

Configure runner

Update the runner configuration on the Rivet side to connect with your Freestyle deployment. Create a configuration script and run it after your Freestyle deployment is live:

import { RivetClient } from "@rivetkit/engine-api-full";

const rivet = new RivetClient({
	environment: "https://api.rivet.dev",
	token: process.env.RIVET_API_TOKEN,
});

const FREESTYLE_DOMAIN = "my-domain.style.dev"; // Change to your desired Freestyle domain
const RIVET_NAMESPACE = "my-rivet-namespace"; // Change to your Rivet namespace

await rivet.runnerConfigsUpsert("freestyle-runner", {
	namespace: RIVET_NAMESPACE,
	datacenters: {
		default: {
			serverless: {
				url: `https://${FREESTYLE_DOMAIN}/start`,
				runnersMargin: 1,
				minRunners: 1,
				maxRunners: 1,
				slotsPerRunner: 1,
				// Must be shorter than Freestyle request `timeout` config
				requestLifespan: 60 * 5 - 5,
			},
		},
	},
});

Execute this configuration script to register your Freestyle deployment with Rivet.

Runner Configuration:

url - Freestyle deployment URL with /start endpoint
runnersMargin - Buffer of runners to maintain
minRunners/maxRunners - Scaling limits
slotsPerRunner - Concurrent actors per runner
requestLifespan - Request timeout (slightly less than Freestyle timeout)

Once executed, Rivet will be connected to your Freestyle serverless instance.