sandbox-agent/docs/sdks/typescript.mdx
2026-01-27 05:06:33 -08:00

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---
title: "TypeScript SDK"
description: "Use the generated client to manage sessions and stream events."
---
The TypeScript SDK is generated from the OpenAPI spec that ships with the server. It provides a typed
client for sessions, events, and agent operations.
## Install
```bash
npm install sandbox-agent
```
## Create a client
```ts
import { SandboxAgent } from "sandbox-agent";
const client = await SandboxAgent.connect({
baseUrl: "http://127.0.0.1:2468",
token: process.env.SANDBOX_TOKEN,
});
```
## Autospawn (Node only)
If you run locally, the SDK can launch the server for you.
```ts
import { SandboxAgent } from "sandbox-agent";
const client = await SandboxAgent.start();
await client.dispose();
```
Autospawn uses the local `sandbox-agent` binary. Install `@sandbox-agent/cli` (recommended) or set
`SANDBOX_AGENT_BIN` to a custom path.
## Sessions and messages
```ts
await client.createSession("demo-session", {
agent: "codex",
agentMode: "default",
permissionMode: "plan",
});
await client.postMessage("demo-session", { message: "Hello" });
```
List agents and pick a compatible one:
```ts
const agents = await client.listAgents();
const codex = agents.agents.find((agent) => agent.id === "codex");
console.log(codex?.capabilities);
```
## Poll events
```ts
const events = await client.getEvents("demo-session", {
offset: 0,
limit: 200,
includeRaw: false,
});
for (const event of events.events) {
console.log(event.type, event.data);
}
```
## Stream events (SSE)
```ts
for await (const event of client.streamEvents("demo-session", {
offset: 0,
includeRaw: false,
})) {
console.log(event.type, event.data);
}
```
The SDK parses `text/event-stream` into `UniversalEvent` objects. If you want full control, use
`getEventsSse()` and parse the stream yourself.
## Optional raw payloads
Set `includeRaw: true` on `getEvents` or `streamEvents` to include the raw provider payload in
`event.raw`. This is useful for debugging and conversion analysis.
## Error handling
All HTTP errors throw `SandboxAgentError`:
```ts
import { SandboxAgentError } from "sandbox-agent";
try {
await client.postMessage("missing-session", { message: "Hi" });
} catch (error) {
if (error instanceof SandboxAgentError) {
console.error(error.status, error.problem);
}
}
```
## Types
The SDK exports OpenAPI-derived types for events, items, and capabilities:
```ts
import type { UniversalEvent, UniversalItem, AgentCapabilities } from "sandbox-agent";
```
See `docs/universal-api.mdx` for the universal schema fields and semantics.