## Record Heartbeat

`beta.environments.work.heartbeat(strwork_id, WorkHeartbeatParams**kwargs)  -> BetaSelfHostedWorkHeartbeatResponse`

**post** `/v1/environments/{environment_id}/work/{work_id}/heartbeat`

Note: these endpoints are called automatically by the pre-built environment worker provided in the SDKs and CLI, for orchestrating sessions with self-hosted sandbox environments. They are included here as a reference; you do not need to invoke them directly.

Record a heartbeat for a work item to maintain the lease.

### Parameters

- `environment_id: str`

- `work_id: str`

- `desired_ttl_seconds: Optional[int]`

  Desired TTL in seconds

- `expected_last_heartbeat: Optional[str]`

  Expected last_heartbeat for conditional update (optimistic concurrency). Use literal 'NO_HEARTBEAT' to claim an unclaimed lease (first heartbeat). For subsequent heartbeats, echo the server's previous last_heartbeat value exactly. Returns 412 Precondition Failed if the actual value doesn't match.

- `betas: Optional[List[AnthropicBetaParam]]`

  Optional header to specify the beta version(s) you want to use.

  - `str`

  - `Literal["message-batches-2024-09-24", "prompt-caching-2024-07-31", "computer-use-2024-10-22", 25 more]`

    - `"message-batches-2024-09-24"`

    - `"prompt-caching-2024-07-31"`

    - `"computer-use-2024-10-22"`

    - `"computer-use-2025-01-24"`

    - `"pdfs-2024-09-25"`

    - `"token-counting-2024-11-01"`

    - `"token-efficient-tools-2025-02-19"`

    - `"output-128k-2025-02-19"`

    - `"files-api-2025-04-14"`

    - `"mcp-client-2025-04-04"`

    - `"mcp-client-2025-11-20"`

    - `"dev-full-thinking-2025-05-14"`

    - `"interleaved-thinking-2025-05-14"`

    - `"code-execution-2025-05-22"`

    - `"extended-cache-ttl-2025-04-11"`

    - `"context-1m-2025-08-07"`

    - `"context-management-2025-06-27"`

    - `"model-context-window-exceeded-2025-08-26"`

    - `"skills-2025-10-02"`

    - `"fast-mode-2026-02-01"`

    - `"output-300k-2026-03-24"`

    - `"user-profiles-2026-03-24"`

    - `"advisor-tool-2026-03-01"`

    - `"managed-agents-2026-04-01"`

    - `"cache-diagnosis-2026-04-07"`

    - `"thinking-token-count-2026-05-13"`

    - `"server-side-fallback-2026-06-01"`

    - `"fallback-credit-2026-06-01"`

### Returns

- `class BetaSelfHostedWorkHeartbeatResponse: …`

  Response after recording a heartbeat for a work item.

  - `last_heartbeat: str`

    RFC 3339 timestamp of the actual heartbeat from DB

  - `lease_extended: bool`

    Whether the heartbeat succeeded in extending the lease

  - `state: Literal["queued", "starting", "active", 2 more]`

    Current state of the work item (active/stopping/stopped)

    - `"queued"`

    - `"starting"`

    - `"active"`

    - `"stopping"`

    - `"stopped"`

  - `ttl_seconds: int`

    Effective TTL applied to the lease

  - `type: Literal["work_heartbeat"]`

    The type of response

    - `"work_heartbeat"`

### Example

```python
import os
from anthropic import Anthropic

client = Anthropic(
    api_key=os.environ.get("ANTHROPIC_API_KEY"),  # This is the default and can be omitted
)
beta_self_hosted_work_heartbeat_response = client.beta.environments.work.heartbeat(
    work_id="work_id",
    environment_id="env_011CZkZ9X2dpNyB7HsEFoRfW",
)
print(beta_self_hosted_work_heartbeat_response.last_heartbeat)
```

#### Response

```json
{
  "last_heartbeat": "last_heartbeat",
  "lease_extended": true,
  "state": "queued",
  "ttl_seconds": 0,
  "type": "work_heartbeat"
}
```