> ## Documentation Index
> Fetch the complete documentation index at: https://checkly-422f444a-paula-tree-202-entitlements-group-troubles.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Trigger a new check session

> Starts a check session for each check that matches the provided target filters. If no filters are given, matches all eligible checks.

This endpoint does not wait for the check session to complete. Use the `GET /v1/check-sessions/{checkSessionId}/completion` or `GET /v1/check-sessions/{checkSessionId}` endpoints to track progress if needed.

Standard alerting rules apply to finished check runs.

Equivalent to the _Schedule Now_ button in the UI.