curl -X POST 'https://api.anthropic.com/v1/environments/environment-id/work/work-id/heartbeat?beta=true&desired_ttl_seconds=10&expected_last_heartbeat=example-expected-last-heartbeat' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

# POST /v1/environments/{environment_id}/work/{work_id}/heartbeat?beta=true (Claude API)
Base URL: https://api.anthropic.com
Auth: x-api-key; Anthropic API key; required.
Status: Beta.
Last verified: 2026-10-20

> Record Heartbeat

## Critical Gotchas
* Authentication uses the `x-api-key` header and requests also require an `anthropic-version` header.
* The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

## cURL
curl -X POST 'https://api.anthropic.com/v1/environments/environment-id/work/work-id/heartbeat?beta=true&desired_ttl_seconds=10&expected_last_heartbeat=example-expected-last-heartbeat' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| environment_id | path | string | Yes | path parameter environment_id. |
| work_id | path | string | Yes | path parameter work_id. |
| desired_ttl_seconds | query | integer | No | Desired TTL in seconds |
| expected_last_heartbeat | query | string | No | Expected last_heartbeat for conditional update (optimistic concurrency). Use... |

## Response example
{"last_heartbeat":"string","lease_extended":true}

---
Need an API key? Get one at https://console.anthropic.com/settings/keys

POST

POST /v1/environments/{environment_id}/work/{work_id}/heartbeat?beta=true — Claude API

Beta

Anthropic API key (required); https://api.anthropic.com

Claude API

Record Heartbeat

Base URL: https://api.anthropic.com
Auth: x-api-key: <ANTHROPIC_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 219 tokens · Vary: Accept

Critical gotchas

Authentication uses the x-api-key header and requests also require an anthropic-version header.

The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

cURL

curl -X POST 'https://api.anthropic.com/v1/environments/environment-id/work/work-id/heartbeat?beta=true&desired_ttl_seconds=10&expected_last_heartbeat=example-expected-last-heartbeat' \  -H "x-api-key: $ANTHROPIC_API_KEY" \  -H 'anthropic-version: 2023-06-01'

Parameters

Name	In	Type	Required	Description
environment_id	path	string	Yes	path parameter environment_id.
work_id	path	string	Yes	path parameter work_id.
desired_ttl_seconds	query	integer	No	Desired TTL in seconds
expected_last_heartbeat	query	string	No	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.

Response 200 OK

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

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