Check-in API

Timer UUIDs

Every timer has a UUID, assigned when the timer is created in the phone app. The UUID is both the timer’s identifier and its credential, so anyone who knows the UUID can check in to the timer. A UUID looks like:

550e8400-e29b-41d4-a716-446655440000

Check-in URL

https://triplepat.com/api/v1/checkin/<uuid>

Requesting the URL with either GET or POST records a check-in for that timer and returns the timer’s new state as JSON:

{
  "lastCheckinTime": "2026-08-02T12:57:28Z",
  "uuid": "550e8400-e29b-41d4-a716-446655440000"
}

There is no separate authentication; the UUID is the credential. Keep your timer’s UUID private.

The public test UUID

The example UUID above is one UUID Wikipedia uses as an example. We have included it in our system as a shared test timer. Because we publish it here, anyone can update it. Feel free to use it while building or testing an integration, but be aware that everyone else can use it as well.

Full API documentation

See our API docs for the complete API.