## Record Heartbeat

`beta.environments.work.heartbeat(work_id, **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: String`

- `work_id: String`

- `desired_ttl_seconds: Integer`

  Desired TTL in seconds

- `expected_last_heartbeat: String`

  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: Array[AnthropicBeta]`

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

  - `String = String`

  - `AnthropicBeta = :"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: String`

    RFC 3339 timestamp of the actual heartbeat from DB

  - `lease_extended: bool`

    Whether the heartbeat succeeded in extending the lease

  - `state: :queued | :starting | :active | 2 more`

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

    - `:queued`

    - `:starting`

    - `:active`

    - `:stopping`

    - `:stopped`

  - `ttl_seconds: Integer`

    Effective TTL applied to the lease

  - `type: :work_heartbeat`

    The type of response

    - `:work_heartbeat`

### Example

```ruby
require "anthropic"

anthropic = Anthropic::Client.new(api_key: "my-anthropic-api-key")

beta_self_hosted_work_heartbeat_response = anthropic.beta.environments.work.heartbeat("work_id", environment_id: "env_011CZkZ9X2dpNyB7HsEFoRfW")

puts(beta_self_hosted_work_heartbeat_response)
```

#### Response

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