# Changelog What shipped in Runtime Cloud, newest first. Runtime ships every day. Each entry is something you can use or see; the guides hold the current terms, and [pricing](./pricing) holds the current rates. ## 23 September 2026 - **Switch in one import from Daytona and Vercel Sandbox too.** Code written for Daytona's or Vercel Sandbox's SDK runs on Runtime after changing one import to `withruntime/daytona` or `withruntime/vercel`, in JavaScript and Python, as E2B code already does with `withruntime/e2b`. - **See what you save.** `runtime compare --from e2b` prices the sandboxes you actually ran at a rival's published rates and prints the monthly saving. Record the provider you are leaving with `runtime switch --from ` before your first top-up, and that top-up is matched, up to $100. - **Works inside the agent tools you use.** A sandbox client for the OpenAI Agents SDK, tools for the Vercel AI SDK, LangChain, CrewAI, LlamaIndex, Pydantic AI, Google ADK, Mastra and the Claude Agent SDK, a Claude Code plugin, and ready configs for Codex, Cursor, Windsurf, VS Code and Gemini CLI. See [frameworks](./frameworks). - **Remote MCP with browser sign-in.** Add Runtime's MCP address to Claude.ai, ChatGPT or another remote client, approve it once in your browser, and it works with no key to paste. Each connection is listed and revocable on your keys page. - **SSH, editors and port forwarding.** `runtime sandbox ssh ` opens a shell, `runtime sandbox ssh config --install` lets VS Code and JetBrains connect, and `runtime sandbox port-forward 5432` brings any TCP port to your machine, all over the API with no port open to the internet. - **Pause answers at the freeze.** A pause returns as soon as the sandbox's processors stop, and compute billing ends there; its memory is saved in the background. - **The SDKs wait for room.** When every sandbox slot is taken, a create waits for one to free, for up to two minutes, instead of failing. - **Every sandbox command lives under `runtime sandbox`.** `runtime sandbox run`, `runtime sandbox ssh` and `runtime sandbox port-forward`, because sandboxes are one product of several. The old `runtime run` says where it went. - **Custom images, all the way.** Build from any Dockerfile: multi-stage, `COPY --from`, `ARG`, heredocs, `ADD` from a URL, `FROM scratch` and `.dockerignore`, with a build context of up to 100 MiB sent from a folder, where a rebuild uploads only what changed. Pull from private registries (Docker Hub, GitHub, Google, Amazon ECR and others) with credentials sealed on arrival and never returned. Each build of a name is its next version, tags such as `latest` point at versions, and a sandbox starts from `name:tag`. An image can run a start command and have its sandbox's create wait for a ready port or command. Rebuilds start from the steps an earlier build shares, four builds run at once on a paid account, and the build log streams. See [custom images](./images). - **Metrics, events and webhooks.** Each sandbox's measured CPU and memory over time, with `sbx.metrics()`, `runtime sandbox metrics`, MCP, and live charts on the sandbox's own page in your account, where owners can also stop it. Lifecycle events (created, running, paused, woken, stopped, start failed) for sandboxes, snapshots and volumes, with `GET /v1/events`. Webhooks send them to your URL, signed like Stripe's, retried for about three days, with a delivery log and a test send; `verifyWebhook` in both SDKs checks them. OpenTelemetry export pushes events as logs and CPU and memory as metrics to any OTLP/HTTP endpoint. See [metrics and webhooks](./observability). - **Teams.** Invite people to your account as owner, admin, developer or billing member; each role can do what its name says and no more, and a key can never do more than the member who made it. A person can belong to several accounts and switch between them on the website or with `runtime account switch`. See [teams](./teams). - **Audit log.** Every change to members, keys, connections, limits, credit, network rules, secrets and durable resources is recorded with who made it, when and from which address, kept at least 400 days. Read it at [Audit log](https://withruntime.com/account/audit), with `GET /v1/audit`, `runtime audit`, the SDKs or MCP. - **Paid sandboxes reach every port.** Databases, `git` over ssh, gRPC and programs that ignore proxy settings work with no setup, on any public host. Trial sandboxes stay on ports 80 and 443, and your network rules narrow every port. - **Secrets sandboxes never see.** `runtime secrets set OPENAI_API_KEY --host api.openai.com` stores a key once; sandboxes see a placeholder, and the proxy adds the value to HTTPS requests to the hosts you named. See [security](./security#secrets-sandboxes-never-see). - **Paused sandboxes wake on request.** A command, a file or terminal call, or a visit to a shared port wakes a paused sandbox by itself, in about half a second, and the call runs. `idlePauseSeconds` now pauses a sandbox after that long without a request, so it costs running time only while it is used. - **Sandboxes by name.** A name is unique in the account, and `Sandbox.getOrCreate(name)` returns that sandbox, woken if paused, or makes it. - **Long-running sandboxes from every interface.** `persistent: true` at create, `sandbox.update()`, `runtime sandbox update --persistent on` or the API keeps a paid sandbox running while credit lasts, and `keepAlive` extends a lease from your own process. - **50 free hours and 100 sandboxes at once.** The free trial is now 50 hours, up from 20, still with no card and eight sandboxes running at once. A paid account starts with room for 100 sandboxes, 200 vCPUs and 400 GiB of memory at once, and more on request. Accounts that signed up before get the 50 hours too. - **Paid accounts run 20 sandboxes at once.** A paid account starts with room for 20 sandboxes, 64 vCPUs and 128 GiB of memory at once, and more on request. - **The free trial runs eight sandboxes at once.** Up from three, with the same 20 free hours and still no card. - **Forks and snapshots for everyone.** Copy a running sandbox with its memory and processes, and choose whether the copies use the trial or paid credit. - **Code written for E2B runs on Runtime.** Change `from "e2b"` to `from "withruntime/e2b"` (Python `withruntime.e2b`) in SDK 0.4.0, and it runs. - **SDKs work behind proxies and inside Cloudflare Workers.** Both SDKs honour `HTTPS_PROXY` and `NO_PROXY`, and the JavaScript SDK runs in a Worker with `nodejs_compat`. - **Keys for CI from the terminal.** `runtime keys create` gets an owner-approved key and prints it once, ready to pipe into a secret store. - **First commands in a fresh sandbox are faster.** Start templates now come with Node, npm, Python, pip, Bun, uv and git already warm, so a first `node` takes 84 ms instead of 1,284 ms. - **A public status page.** [withruntime.com/status](https://withruntime.com/status) checks the API from outside every two minutes and starts a real sandbox every ten. - **Storage prices for snapshots, images and volumes.** Snapshots and images cost $0.08 per GB a month and volumes about $0.11 per GiB a month, and the trial keeps three images and 10 GiB of volumes free for good. - **Read your own limits.** `runtime limits` and `runtime.limits.get()` show whether a key is read-only and how much of its daily limit is left. - **Side-by-side guides.** Comparisons with E2B, Daytona, Vercel, Modal, Cloudflare and Fly.io, each with the cost of the same job. ## 22 September 2026 - **Custom images.** Build an image from a package list, a public image or a Dockerfile, and start every sandbox from it. - **Volumes.** Persistent disks that outlive sandboxes, attached read-write to one or read-only to many. - **Previews.** Give any port in a sandbox an HTTPS address at `runtimehost.com`, private with a token unless you make it public. - **A desktop in any sandbox.** Start a Linux desktop and drive it with clicks, keys and screenshots, or watch it live. - **Code interpreter.** A notebook-style Python or JavaScript session in a sandbox, with charts returned as images. - **Network rules per sandbox.** Allow or deny hosts, turn the internet off, and open `host:port` pairs such as a database on a paid account. - **Interactive terminals.** `runtime sandbox shell` opens a real terminal in a sandbox, and the API serves one over WebSocket. - **Read-only keys and daily spending limits.** An owner can give an agent a key that changes nothing, or cap what it may spend in any 24 hours. - **Buy credit by card.** Add any amount from $10 to $10,000, with no subscription. - **Referrals.** Refer a company and you both get credit equal to its first top-up, up to $500 each. - **A 20-hour free trial.** Every new account gets 20 sandbox hours with no card. - **One line connects your agent.** `claude mcp add --scope user runtime -- npx -y withruntime mcp` (or the same for Codex and Cursor) is the whole setup; the agent asks for one browser approval. - **`runtime run`.** One command creates a sandbox, runs your command, prints its output and stops it, connecting the machine on first use. - **In the official MCP registry.** Runtime Cloud is listed for any MCP client to find. - **The `withruntime` package.** Both SDKs publish as `withruntime` on npm and PyPI, and the old names still install it. - **API 0.2.0.** One API for every product, over HTTP/2, with a public OpenAPI document. - **A hundred commands at once.** One key can have 128 requests in flight, so an agent can fan out without refusals. - **Idle sandboxes pause themselves.** A sandbox left on the default lease and never used pauses after five minutes, so it stops paying the running rate. - **Retries you never see.** A brief outage answers 503 with `Retry-After`, and both SDKs retry it with the same idempotency key. - **Ask support anywhere.** Ask from the dashboard, with `runtime support`, or at support@withruntime.com. ## 21 September 2026 - **Public signup opens.** Anyone can sign up and start a sandbox on the free trial. ## 20 September 2026 - **Connect an agent from the browser.** An agent shows you a link and a code, and you approve it once. - **Keys for every product.** An API key works across every Runtime Cloud product and lasts until you revoke it. - **withruntime.com.** Runtime Cloud moves to one address. ## 19 September 2026 - **Wake in about a third of a second.** A paused sandbox comes back with its memory and processes in about a third of a second. ## 18 September 2026 - **Pause keeps memory.** A paused sandbox saves its running memory and wakes with its processes still running. - **Pay for the CPU you use.** CPU is charged only while it is busy, and memory while the sandbox runs.