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GET
/
v1
/
checks
/
heartbeats
/
{checkId}
/
availability
Get heartbeat availability
curl --request GET \
  --url https://api.checklyhq.com/v1/checks/heartbeats/{checkId}/availability \
  --header 'Authorization: Bearer <token>'
{
  "successRatio": {
    "previousPeriod": 123,
    "currentPeriod": 123
  },
  "totalEntitiesCurrentPeriod": 123
}

Documentation Index

Fetch the complete documentation index at: https://checkly-422f444a-michelle-document-missing-api-endpoints.mintlify.app/llms.txt

Use this file to discover all available pages before exploring further.

Authorizations

​
Authorization
string
header
required

The Checkly Public API uses API keys to authenticate requests. You can get the API Key here. Your API key is like a password: keep it secure! Authentication to the API is performed using the Bearer auth method in the Authorization header and using the account ID. For example, set Authorization header while using cURL: curl -H "Authorization: Bearer [apiKey]" "X-Checkly-Account: [accountId]"

Headers

​
x-checkly-account
string

Your Checkly account ID, you can find it at https://app.checklyhq.com/settings/account/general

Path Parameters

​
checkId
string
required

Query Parameters

​
startTime
string<date>
default:2026-05-21T12:45:57.493Z
​
endTime
string<date>
default:2026-05-22T12:45:57.494Z

Response

object | null

Successful

​
successRatio
object
​
totalEntitiesCurrentPeriod
number