---
title: "Changes to Get heartbeat availability"
method: GET
path: "/v1/checks/heartbeats/{checkId}/availability"
---

# Changes to Get heartbeat availability

`GET /v1/checks/heartbeats/{checkId}/availability`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 2 of 4 revisions.

- **2026-08-12** `87d29dc7b4fe` — 2 breaking, 1 info
- **2026-08-05** `9e903da4f3da` — 2 breaking

## Changes

- **2026-08-12** `87d29dc7b4fe` — 2 breaking, 1 info
  - for the `query` request parameter `endTime`, default value `2026-08-03T03:10:37.187Z` was removed
  - for the `query` request parameter `startTime`, default value `2026-08-02T03:10:37.187Z` was removed
  - added the non-success response with the status `400`
- **2026-08-05** `9e903da4f3da` — 2 breaking
  - for the `query` request parameter `endTime`, default value was changed from `2026-07-13T03:11:26.005Z` to `2026-08-03T03:10:37.187Z`
  - for the `query` request parameter `startTime`, default value was changed from `2026-07-12T03:11:26.004Z` to `2026-08-02T03:10:37.187Z`

---

[Operation](https://skmtc.dev/checklyhq/apis/checkly-public-api/docs/v1/checks/heartbeats/:checkId/availability/get.md) · [API](https://skmtc.dev/checklyhq/apis/checkly-public-api.md) · [Page](https://skmtc.dev/checklyhq/apis/checkly-public-api/changes/v1/checks/heartbeats/:checkId/availability/get)