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For local development, run Sandbox Agent directly on your machine.

​
With the CLI

# Install
curl -fsSL https://releases.rivet.dev/sandbox-agent/0.2.x/install.sh | sh

# Run
sandbox-agent server --no-token --host 127.0.0.1 --port 2468
Or with npm/Bun: 
npx @sandbox-agent/cli@0.2.x server --no-token --host 127.0.0.1 --port 2468

​
With the TypeScript SDK

The SDK can spawn and manage the server as a subprocess: 
import { SandboxAgent } from "sandbox-agent";

const sdk = await SandboxAgent.start();

const session = await sdk.createSession({
  agent: "claude",
});

await session.prompt([
  { type: "text", text: "Summarize this repository." },
]);

await sdk.dispose();
This starts the server on an available local port and connects automatically.