# Create lease URL: https://docs.hanzo.ai/docs/openapi/sandbox/lease-sandbox > Leases the caller's sandbox, or returns the one it named if that lease is still running, or gives it a pod again if it is parked — with its disk as it was left. `POST /v1/sandbox/lease` > [Sandbox →](https://docs.hanzo.ai/docs/openapi/sandbox) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | ------------- | --------------------------------------- | | **Address** | `https://api.hanzo.ai/v1/sandbox/lease` | | **Method** | `POST` | | **Operation** | `lease_sandbox` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Leases the caller's sandbox, or returns the one it named if that lease is still running, or gives it a pod again if it is parked — with its disk as it was left. What comes back is a real computer: a pod under a runtime boundary with a toolchain already in it, its own filesystem, and a lease that ends it. Every other op here acts on the one this returns. ## Request 7 fields, body `application/json` (required). | Field | In | Type | Required | Description | | --------- | ---- | --------------- | -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `class` | body | string | — | Class is what KIND of computer to lease, and the set is closed: exec a throwaway one that keeps nothing. | | `cluster` | body | string | — | Cluster names one of the org's ATTACHED clusters to run the lease on — the fleet-local name a BYO cluster was registered under. | | `disk` | body | boolean | — | Disk gives a sandbox with no Project a disk of its OWN, so what it writes survives a park: small — the size its working directory always had — billed as storage for as long as it exists, and deleted with the lease. | | `id` | body | string | — | ID names a sandbox to RESUME, and is the id an earlier lease answered with. | | `project` | body | string | — | Project names the disk to attach, and is REQUIRED for every class but `exec`. | | `runtime` | body | string | — | Runtime is the isolation boundary asked for: `gvisor` shares a filesystem and holds a project volume, `kata-fc` is a microVM that boots slower and reads files faster but has no shared filesystem at all. | | `ttlSec` | body | integer (int64) | — | TTLSec bounds the lease in seconds. | ## Response | Status | Body | Meaning | | --------- | --------------- | ------- | | `200` | sandbox.Leased | ok | | `default` | problem-details | refused | `200` body — 6 fields. | Field | In | Type | Always | Description | | --------- | ---- | ------ | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | `class` | body | string | — | Class is what was actually leased, from the closed set LeaseIn.Class names: exec \| dev \| desktop \| android. | | `cluster` | body | string | — | Cluster is the attached cluster this sandbox runs on, when one was named. | | `id` | body | string | — | ID names this computer for every later call — run, read, write, stop and end all take it, and a LeaseIn carrying it resumes THIS sandbox instead of leasing a second one. | | `runtime` | body | string | — | Runtime is the boundary this sandbox GOT, which need not be the one asked for — carried for the same reason Workdir is, that it is a fact only the owner knows and a caller assuming it would be holding a second copy. | | `status` | body | string | — | Status is where the pod stands, from the store's three: pending \| running \| error. | | `workdir` | body | string | — | Workdir is the absolute directory this sandbox keeps files in, and what a relative path in a later read, write or run resolves against — /work for dev, desktop and android (the project volume's mount point), /mnt/data for exec (the artifact directory the code tool tells the model to write to). | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo sandbox lease ``` **SDK** **.ts** ```ts import { Configuration, SandboxApi } from 'hanzoai'; const api = new SandboxApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.leaseSandbox({ class: "", cluster: "" }); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import SandboxApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = SandboxApi(client).lease_sandbox(class="", cluster="") ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.SandboxAPI.LeaseSandbox(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, sandbox_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = sandbox_api::lease_sandbox(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.SandboxApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new SandboxApi(client).leaseSandbox(); ``` **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/sandbox/lease \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "class": "", "cluster": "" }' ``` **MCP** Tool `sandbox`, op `lease_sandbox` — POST the JSON-RPC envelope to `https://api.hanzo.ai/v1/mcp`. ```bash curl -X POST https://api.hanzo.ai/v1/mcp \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "sandbox", "arguments": { "op": "lease_sandbox", "input": { "class": "", "cluster": "" } } } }' ``` --- [Sandbox API](https://docs.hanzo.ai/docs/openapi/sandbox) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)