upstash-box-js

npm install @upstash/box
npm install zod   # peer dependency, only needed for responseSchema / browser schemas

import { Box, Agent, ClaudeCode, BoxApiKey } from "@upstash/box"
 
// Create with agent + git + env vars
const box = await Box.create({
  name: "my-box",
  runtime: "node", // "node" | "python" | "golang" | "ruby" | "rust" (+ "-alpine" variants)
  size: "small",   // "small" (2 CPU/4GB) | "medium" (4/8) | "large" (8/16)
  labels: ["beta", "x-team"], // max 5, ≤20 chars each
  keepAlive: true,            // don't idle-pause the box
  initCommand: "npm install && npm run dev", // keep-alive boxes only
  browser: true,              // provision headless Chromium for box.browser
  agent: {
    harness: Agent.ClaudeCode, // Agent.Codex | Agent.OpenCode | Agent.Cursor | Agent.Custom
    model: ClaudeCode.Sonnet_4_5,
    // apiKey options:
    //   omit          → server decides which key to use
    //   BoxApiKey.UpstashKey  → use Upstash-provided LLM key
    //   BoxApiKey.StoredKey   → use key previously stored via Upstash Console
    //   "sk-..."      → direct API key string
    apiKey: BoxApiKey.UpstashKey,
  },
  git: { // all fields optional
    token: process.env.GITHUB_TOKEN, // alternatively link your GitHub account via Upstash Console
    userName: "Bot",
    userEmail: "bot@example.com",
  },
  env: { DATABASE_URL: "..." },
  skills: ["upstash/qstash-js/qstash-js"], // owner/repo/skill-name
  timeout: 600_000, // request timeout in ms
  debug: false,
})
 
// Reconnect, list, delete, pause/resume
// Box.get / Box.getByName take { apiKey, baseUrl, gitToken, timeout, debug }
const same = await Box.get(box.id, { gitToken: process.env.GITHUB_TOKEN })
const byName = await Box.getByName("my-box")
const all = await Box.list()
const beta = await Box.list({ label: "beta" }) // filter by label
await box.pause()   // throws on keep-alive boxes — they are never idle-paused
await box.resume()
await box.delete()  // irreversible
const { status } = await box.getStatus()
 
box.id; box.size; box.keepAlive; box.cwd; box.networkPolicy
 
// Init command (keep-alive boxes only — throws otherwise)
await box.setInitCommand("npm run dev")
const script = await box.getInitCommand()
await box.deleteInitCommand()
 
// Bulk delete (static, by ID)
await Box.delete({ boxIds: ["box_1", "box_2"] })
const { deleted } = await Box.deleteSnapshots({ snapshotIds: ["snap_1"] }) // omit ids → delete all

await Box.setEnv("API_TOKEN", "secret")
const env = await Box.listEnv()          // values are masked
await Box.setAllEnv({ A: "1", B: "2" })  // full replace — unlisted keys are removed
await Box.deleteEnv("API_TOKEN")

import { z } from "zod"
 
// Structured output with Zod schema
const run = await box.agent.run({
  prompt: "Review the code for security issues",
  responseSchema: z.object({
    verdict: z.enum(["approved", "changes_requested"]),
    findings: z.array(z.object({
      severity: z.enum(["high", "medium", "low"]),
      file: z.string(),
      issue: z.string(),
    })),
  }),
  timeout: 120_000,
  maxRetries: 2,
  options: { maxTurns: 20, maxBudgetUsd: 1.0, effort: "high" }, // harness-specific
  onToolUse: (tool) => console.log(tool.name, tool.input),
  onToolResult: (result) => console.log(result.toolCallId, result.output),
})
 
run.status  // "running" | "completed" | "failed" | "cancelled" | "detached"
run.result  // typed from schema
run.cost    // { inputTokens, outputTokens, cachedInputTokens, computeMs, totalUsd }
 
// Attach files to a prompt (max 10 files, 10 MB each)
await box.agent.run({ prompt: "Describe this", files: ["./screenshot.png"] })
await box.agent.run({
  prompt: "Describe this",
  files: [{ data: base64, mediaType: "image/png", filename: "shot.png" }],
})
 
// Streaming — chunk is a discriminated union
const stream = await box.agent.stream({ prompt: "Build a REST API" })
for await (const chunk of stream) {
  if (chunk.type === "text-delta") process.stdout.write(chunk.text)
  if (chunk.type === "reasoning") process.stdout.write(chunk.text)
  if (chunk.type === "tool-call") console.log(chunk.toolName, chunk.input)
  if (chunk.type === "tool-result") console.log(chunk.output)
  if (chunk.type === "finish") console.log(chunk.output, chunk.usage, chunk.sessionId)
  // also: { type: "start", runId } | { type: "stats", cpuNs, memoryPeakBytes } | { type: "unknown" }
}
stream.status // "completed" after iteration finishes
stream.result // final output
 
// stream() takes the same prompt/files/options/timeout/onToolUse/onToolResult as run().
// It has no responseSchema, maxRetries, or webhook — use run() for those.
 
// Fire-and-forget with webhook
await box.agent.run({
  prompt: "Run tests",
  webhook: { url: "https://example.com/hook", headers: { Authorization: "Bearer ..." } },
})

// Agent.ClaudeCode → ClaudeCodeAgentOptions
{
  maxTurns: 20,
  maxBudgetUsd: 1.0,
  effort: "high",                 // "low" | "medium" | "high" | "max"
  thinking: { type: "adaptive" }, // | { type: "enabled", budgetTokens: 8000 } | { type: "disabled" }
  disallowedTools: ["Bash"],
  agents: { reviewer: { /* custom subagent definition */ } },
  promptSuggestions: false,
  fallbackModel: "anthropic/claude-sonnet-4-5",
  systemPrompt: "You are a release engineer.",
}
 
// Agent.Codex → CodexAgentOptions
{
  modelReasoningEffort: "high",   // "none" | "minimal" | "low" | "medium" | "high" | "xhigh"
  modelReasoningSummary: "concise", // "auto" | "concise" | "detailed" | "none"
  personality: "pragmatic",       // "friendly" | "pragmatic" | "none"
  webSearch: "live",              // or true / false
}
 
// Agent.OpenCode → OpenCodeAgentOptions
{
  reasoningEffort: "high",        // "low" | "medium" | "high"
  textVerbosity: "low",           // "low" | "medium" | "high"
  reasoningSummary: "auto",       // "auto" | "concise" | "detailed" | "none"
  thinking: { type: "enabled", budgetTokens: 8000 }, // Anthropic-backed models
}
 
// Agent.Cursor → free-form Record<string, unknown>

import { ClaudeCode, OpenAICodex, OpenCodeModel, CursorModel, OpenRouterModel, VercelModel } from "@upstash/box"
 
ClaudeCode.Fable_5_1     // "anthropic/claude-fable-5-1"
ClaudeCode.Opus_5        // "anthropic/claude-opus-5"
ClaudeCode.Sonnet_5      // "anthropic/claude-sonnet-5"
OpenAICodex.GPT_6_Astra  // "openai/gpt-6-astra"
OpenAICodex.GPT_5_6      // "openai/gpt-5.6"
OpenCodeModel.Claude_Opus_5   // "opencode/claude-opus-5"
CursorModel.Composer_2_5 // "cursor/composer-2.5"
OpenRouterModel.Claude_Opus_5 // "openrouter/anthropic/claude-opus-5"
VercelModel.GPT_5_5      // "vercel/openai/gpt-5.5"
 
// Read / change the box's harness + model at runtime
const { harness, model } = box.modelConfig
await box.configureModel("anthropic/claude-opus-4-8")
 
// Which harness a bare model string implies (prefix-based)
import { inferDefaultProvider } from "@upstash/box"
inferDefaultProvider("openai/gpt-5.6")   // Agent.Codex
inferDefaultProvider("cursor/default")   // Agent.Cursor

import { Box, Agent, runCustomHarness } from "@upstash/box"
 
const box = await Box.create({
  agent: {
    harness: Agent.Custom,
    model: "my-agent",                                  // label forwarded to the process
    // command: name on PATH, or an absolute path under /workspace/home or /home/boxuser
    customHarness: { command: "node", args: ["/workspace/home/agent.js"], protocol: "box-sse-v1" },
  },
})
await box.configureCustomHarness({ command: "node", args: ["/workspace/home/agent2.js"] })
 
// Inside the box, agent.js emits box-sse-v1 events. The backend appends
// `-p <prompt> --model <model> --stream` (+ `--session <id>` when resuming).
await runCustomHarness(async ({ prompt, model, sessionId, stream, args }, emit) => {
  emit.text("working...")
  emit.reasoning("thinking out loud")            // -> `thinking` event
  emit.tool({ toolCallId: "1", name: "Bash", input: { command: "ls" } })
  emit.toolResult({ toolCallId: "1", output: "file.txt" })
  emit.emit("custom-event", { any: "payload" })  // raw escape hatch
  // emit.error(new Error("boom")) to fail the run
  return {
    output: "done",
    inputTokens: 10,
    outputTokens: 5,
    cachedInputTokens: 0,
    totalCostUsd: 0.01,
    sessionId,
  } // returning a plain string is shorthand for { output }
})

const run = await box.exec.command("npm test")
run.id        // run ID
run.status    // "completed" | "failed" | ...
run.result    // stdout on success, stderr on failure (or typed T with responseSchema)
run.stdout    // raw stdout (command/code runs)
run.stderr    // raw stderr (command/code runs)
run.exitCode  // number | null (null for agent runs)
run.cost      // { inputTokens, outputTokens, cachedInputTokens, computeMs, totalUsd }
 
await run.cancel()          // cancel a running run
const logs = await run.logs() // [{ timestamp, level, message }]
 
// Box-level history
const entries = await box.logs({ limit: 100, offset: 0 }) // [{ timestamp, level, source, message }]
const runs = await box.listRuns()              // backend run records, newest first

// Run commands
const run = await box.exec.command("echo hello && ls -la")
 
// Run code snippets — lang: "js" | "ts" | "python"
const run2 = await box.exec.code({ code: "console.log(1+1)", lang: "js", timeout: 10_000 })
 
// Streaming shell / code
const stream = await box.exec.stream("npm run build")
const stream2 = await box.exec.streamCode({ code: "print('hi')", lang: "python" })
for await (const chunk of stream) {
  // chunk: { type: "output", data } | { type: "exit", exitCode, cpuNs }
}

const session = await box.exec.session({
  cmd: "sort",              // run via `bash -lc`; `argv: ["sort"]` runs the program with
                            // no shell and takes precedence over cmd
  cwd: "/workspace/home",   // defaults to the box's tracked cwd
  env: ["LOG_LEVEL=debug"], // KEY=VALUE entries overlaid on the box environment
  onStdout: (bytes) => process.stdout.write(bytes), // Uint8Array
  onStderr: (bytes) => process.stderr.write(bytes), // separate stream unless tty
})
 
session.pid                        // in-box PID, always non-zero
session.execId                     // server-side exec id
session.write("banana\napple\n")
session.endStdin()                 // EOF — a command that reads to EOF now exits by itself
const exitCode = await session.wait()  // -1 if torn down while still running
session.close()                    // hang up; also kills the process
 
// Interactive programs / TUIs — tty allocates a real PTY, merging stderr into stdout
const shell = await box.exec.session({ argv: ["bash", "-i"], tty: true, rows: 40, cols: 120 })
shell.resize(50, 160)
shell.kill("INT")     // allowlist: TERM KILL INT HUP TSTP QUIT USR1 USR2 (default TERM)
shell.terminate(5000) // server-side SIGTERM, then SIGKILL after the grace (first call wins)

await box.files.write({ path: "/workspace/home/app.js", content: "console.log('hi')" })
const content = await box.files.read("/workspace/home/app.js")
const entries = await box.files.list("/workspace/home") // [{ name, path, size, is_dir, mod_time }]
 
// Binary files — use encoding: "base64" for read and write
await box.files.write({ path: "/workspace/home/image.png", content: base64String, encoding: "base64" })
const b64 = await box.files.read("/workspace/home/image.png", { encoding: "base64" })
 
// Bounded byte-range read — the *presence* of `length` selects the range, so
// { length: 0 } reads zero bytes rather than the whole file. Server caps it at 8 MiB.
const head = await box.files.read("/workspace/home/big.log", { length: 64 * 1024 })
const slice = await box.files.read("/workspace/home/big.log", { offset: 1024, length: 512 })
 
// Metadata — defaults to lstat, so a symlink reports type "symlink"
const stat = await box.files.stat("/workspace/home/app.js")
// stat: { type: "file" | "directory" | "symlink" | "other", size, mod_time, inode, version }
// `version` is an opaque freshness token (inode + mtime + size) for optimistic-concurrency
// guards — compare it for equality, never parse it.
const target = await box.files.stat("/workspace/home/link", { follow: true }) // dereference
 
// Directories, moves, deletes
await box.files.mkdir("build/cache", { parents: true }) // parents mirrors `mkdir -p`
await box.files.rename("draft.md", "docs/final.md")     // move/rename
await box.files.remove("build/cache", { recursive: true }) // recursive required for a directory
 
// Upload local files
await box.files.upload([{ path: "./local/file.txt", destination: "/workspace/home/file.txt" }])
 
// Download — `folder` is a path INSIDE the box; files land in ./<basename>
await box.files.download({ folder: "src" }) // → ./src
await box.files.download()                  // whole cwd → ./workspace

box.cwd // current working directory (starts at /workspace/home)
await box.cd("my-repo")     // relative to current cwd
await box.cd("/workspace/home/other") // absolute path

await box.git.clone({ repo: "github.com/org/repo", branch: "main" })
await box.git.clone({ repo: "github.com/org/repo", depth: 1 }) // shallow clone
await box.git.clone({ repo: "github.com/org/repo", folder: "my-app" }) // destination
await box.cd("repo") // the clone lands in a directory named after the repo
 
const status = await box.git.status()
const diff = await box.git.diff()
const { sha } = await box.git.commit({
  message: "fix: resolve bug",
  authorName: "Jane Doe",      // optional per-commit override
  authorEmail: "jane@example.com",
})
await box.git.push({ branch: "feature/fix" })
 
await box.git.checkout({ branch: "release/v2" })
const pr = await box.git.createPR({ title: "Fix bug", body: "...", base: "main" })
// pr: { url, number, title, base }
 
// Update the box-wide git identity
const cfg = await box.git.updateConfig({ userName: "Bot", userEmail: "bot@example.com" })
// cfg: { git_user_name, git_user_email }
 
// Arbitrary git commands. Check exit_code: 128 means the cwd is not a repository.
const { output, exit_code } = await box.git.exec({ args: ["log", "--oneline", "-5"] })

const execSchedule = await box.schedule.exec({
  cron: "* * * * *",
  command: ["bash", "-c", "date >> /workspace/home/cron.log"],
  folder: "/workspace/home",            // optional cwd override
  webhookUrl: "https://example.com/hook",
  webhookHeaders: { Authorization: "Bearer ..." },
})
 
const agentSchedule = await box.schedule.agent({
  cron: "0 9 * * *",
  prompt: "Run the test suite and fix any failures",
  folder: "/workspace/home/repo",       // optional cwd override
  model: "anthropic/claude-sonnet-5",   // optional override
  options: { maxBudgetUsd: 1.0, effort: "high" },
  timeout: 300_000,
  webhookUrl: "https://example.com/hook",
  webhookHeaders: { Authorization: "Bearer ..." },
})
 
const schedules = await box.schedule.list()
const one = await box.schedule.get(agentSchedule.id)
 
// Partial update — omitted fields keep their value, "" / [] / {} clear a field,
// `options: null` clears agent options. The schedule's type cannot change.
// Updatable: cron, command, prompt, folder, model, options, timeout, webhookUrl, webhookHeaders
await box.schedule.update(agentSchedule.id, { cron: "0 18 * * *", webhookUrl: "" })
 
await box.schedule.pause(agentSchedule.id)
await box.schedule.resume(agentSchedule.id)
await box.schedule.delete(agentSchedule.id)

// Snapshot — checkpoint workspace state
const snap = await box.snapshot({ name: "after-setup" })
// snap: { id, name, box_id, size_bytes, status, created_at }
 
// fromSnapshot takes a BoxConfig: name, labels, size, keepAlive, initCommand, runtime,
// agent, git, env, attachHeaders, networkPolicy. It does NOT send `browser`, `skills`,
// or `mcpServers` (the Python SDK does) — add skills with box.skills.add() afterwards,
// and use Box.create({ browser: true }) when you need Chromium.
const restored = await Box.fromSnapshot(snap.id, {
  size: "medium",
  keepAlive: true,
  // git identity is forwarded, not just the token
  git: { token: process.env.GITHUB_TOKEN, userName: "Bot", userEmail: "bot@example.com" },
  env: { DATABASE_URL: "..." },
})
const snaps = await box.listSnapshots()
await box.deleteSnapshot(snap.id)

import { z } from "zod"
 
const box = await Box.create({
  browser: true,
  agent: { harness: Agent.ClaudeCode, model: ClaudeCode.Sonnet_4_5 },
})
 
// Tabs
const tab = await box.browser.tab.create("https://example.com", { waitUntil: "load", timeout: 30_000 })
const tabs = await box.browser.listTabs()
const again = box.browser.getTab(tab.id) // no network call
tab.id; tab.url; tab.title                // handle metadata, no network call
 
// Page operations
const content = await tab.goto("https://news.ycombinator.com") // { title, url, text, links }
const current = await tab.content()
const png = await tab.screenshot()                                  // Uint8Array
const b64 = await tab.screenshot({ type: "base64", fullPage: true })
 
// AI operations (metered) — extract/observe/act take an optional { model } override,
// defaulting to the box's model (or anthropic/claude-sonnet-4-5 when it has none)
const data = await tab.extract(
  "Top story title and points",
  z.object({ title: z.string(), points: z.number() }),
  { model: "anthropic/claude-sonnet-4-5" },
)
// observe → actionable elements, each carrying a replayable method + arguments
const { elements } = await tab.observe("What can I click?", { model: "openai/gpt-5.6" })
// elements: [{ description, selector?, url?, method?, arguments? }]
 
const acted = await tab.act("Click the first headline")
// acted: { success, message, actionDescription, actions, cacheStatus?, inputTokens, outputTokens }
 
// Replay a pre-resolved action — no LLM call, no tokens, no model provider key.
// Takes a BrowserAction (= BrowserObserveElement | BrowserActAction); `model` is
// ignored in this form, and an action without a `selector` throws.
await tab.act(elements[0])
await tab.act(acted.actions[0])
 
// Live view + raw CDP
const liveUrl = await tab.liveViewUrl()      // view-only screencast page/iframe
const cdpUrl = await box.browser.cdpUrl()    // wss://…?token=… — no extra auth wiring
await tab.close()
 
// Drive the same browser from Playwright / Puppeteer / Stagehand
import { chromium } from "playwright-core"
const remote = await chromium.connectOverCDP(cdpUrl)
const context = remote.contexts()[0] ?? (await remote.newContext())
const page = context.pages()[0] ?? (await context.newPage())
await page.goto("https://example.com")
// Stagehand: new Stagehand({ env: "LOCAL", localBrowserLaunchOptions: { cdpUrl } })
 
// Session recordings (HLS playback URL + MP4 download, chapter markers).
// One active recording per box; captures all tabs and follows the foreground.
// Auto-stops after maxDurationSeconds or ~3 minutes of no on-screen activity.
const handle = await box.browser.recordings.start({ maxDurationSeconds: 600 }) // default & max 600
const recording = await handle.stop()
// or stop whatever is recording on the box, without a handle:
// const recording = await box.browser.recordings.stop()
// recording: { id, boxId, status, startedAt, endedAt, durationMs, sizeBytes, mp4SizeBytes,
//              segmentCount, markers, stoppedReason, maxDurationSeconds, expiresAt, playlistUrl }
// markers: { type: "tab_switch", atMs, endMs?, label?, tabId? }
// expiresAt is epoch ms (videos retained 14 days); playlistUrl is API-served — fetch it
// with an `X-Box-Api-Key: <apiKey>` header (hls.js / Safari / ffplay).
const all = await box.browser.recordings.list()
const one = await box.browser.recordings.get(recording.id)
 
// Download the video to a local file — returns the path written.
// Defaults to ./box-recording-<id>.mp4 (.ts for recordings captured before MP4 support).
const file = await box.browser.recordings.download(recording.id)
await box.browser.recordings.download(recording.id, { path: "./out/demo.mp4" })

const { elements } = await tab.observe("the product links in the listing")
const actions = elements.filter((e) => e.selector)
 
for (const action of actions.slice(0, 5)) {
  await tab.goto(START) // deterministic reset, no browser-AI tokens
  await tab.act(action) // replay the resolved click: no LLM, no tokens
  const item = await tab.extract("title and price", z.object({ title: z.string() }))
}

import { EphemeralBox } from "@upstash/box"
 
const ebox = await EphemeralBox.create({
  name: "scratch-box",
  runtime: "python",
  size: "small",
  ttl: 3600,  // seconds, max 259200 (3 days), default 259200
  env: { API_KEY: "..." },
  labels: ["scratch"], // settable at create time; filter via Box.list({ label })
  networkPolicy: { mode: "deny-all" },
  attachHeaders: { "api.stripe.com": { Authorization: "Bearer sk_live_..." } },
})
 
ebox.networkPolicy
 
ebox.expiresAt // unix timestamp when auto-deleted
await ebox.exec.command("python -c 'print(1+1)'")
await ebox.exec.code({ code: "print('hi')", lang: "python" })
await ebox.exec.session({ argv: ["bash", "-i"], tty: true }) // whole exec namespace, session included
await ebox.files.write({ path: "/workspace/home/data.json", content: "{}" })
await ebox.files.stat("/workspace/home/data.json")           // whole files namespace, stat/mkdir/rename/remove included
await ebox.schedule.exec({ cron: "* * * * *", command: ["bash", "-c", "date"] })
await ebox.cd("subdir")
const snap = await ebox.snapshot({ name: "checkpoint" })
await ebox.listSnapshots()
await ebox.deleteSnapshot(snap.id)
const { status } = await ebox.getStatus()
await ebox.delete()
 
// Restore from snapshot
const ebox2 = await EphemeralBox.fromSnapshot(snap.id, { ttl: 7200 })
 
// Statics: EphemeralBox.delete({ boxIds }) and EphemeralBox.deleteSnapshots() are the
// Box ones. EphemeralBox.getByName() is Box.get — it returns a full `Box`, not an
// `EphemeralBox` (quirk mirrored in the Python SDK).

const publicURL = await box.getPublicURL(3000)
// publicURL: { url: "https://{id}-3000.preview.box.upstash.com", port }
 
const authed = await box.getPublicURL(3000, { bearerToken: true })
// authed: { url, port, token }
 
const basic = await box.getPublicURL(3000, { basicAuth: true })
// basic: { url, port, username, password }
 
const { publicURLs } = await box.listPublicURLs()
await box.deletePublicURL(3000)

const box = await Box.create({ skills: ["upstash/qstash-js/qstash-js"] })
 
await box.skills.add("upstash/workflow-js/workflow-js")
const enabled = await box.skills.list()
await box.skills.remove("upstash/workflow-js/workflow-js")

const labels = await box.labels.add("prod")     // returns the updated set
await box.labels.remove("beta")
const current = await box.labels.list()
const prodBoxes = await Box.list({ label: "prod" })

const box = await Box.create({
  // mode: "allow-all" (default) | "deny-all" | "custom"
  // custom takes any of allowedDomains / allowedCidrs / deniedCidrs
  networkPolicy: {
    mode: "custom",
    allowedDomains: ["api.example.com"],
    allowedCidrs: ["203.0.113.0/24"],
    deniedCidrs: ["10.0.0.0/8"],
  },
 
  // Inject secret headers into matching outbound HTTPS requests (write-only, never read back)
  attachHeaders: {
    "api.stripe.com": { Authorization: "Bearer sk_live_..." },
    "*.example.com": { "X-Custom-Token": "secret123" },
  },
})
 
box.networkPolicy
await box.updateNetworkPolicy({ mode: "deny-all" })

const box = await Box.create({
  agent: { harness: Agent.ClaudeCode, model: ClaudeCode.Sonnet_4_5 },
  mcpServers: [
    { name: "fs", package: "@modelcontextprotocol/server-filesystem", args: [] },
    { name: "custom", url: "<your-mcp-server-url>", headers: { Authorization: "..." } },
  ],
})

import { BoxError } from "@upstash/box"
 
try {
  await box.agent.run({ prompt: "..." })
} catch (e) {
  if (e instanceof BoxError) console.error(e.message, e.statusCode)
}

ssh <box-id>@us-east-1.box.upstash.com