Vercel cron monitor never records check‐ins when using App Router

[dalnoki]

Environment

SaaS (https://sentry.io/)

Steps to Reproduce

A Vercel Cron Job (*/15 * * * * in region sin1) invokes the endpoint successfully (200 OK in Vercel logs), but Sentry’s scheduled monitor shows zero check‐ins.

Logs reveal a recurring network error when Sentry attempts to send envelopes. When they switch to the Pages router, the checkins are sent successfully. Please find additional details here.

Expected Result

Sentry should automatically create and report check‐ins for the monitor on each successful invocation, regardless of whether the project uses Pages or App Router.

Actual Result

• No check‐ins are recorded in Sentry
• Sentry logs the ECONNRESET error attempting to send envelopes

Product Area

Crons

Link

No response

DSN

No response

Version

No response

[getsantry]

Assigning to @getsentry/support for routing ⏲️

[jamescqcampbell]

We are experiencing this issue. Please let us know if we can provide any further debugging information to assist you.

[getsantry]

Routing to @getsentry/product-owners-crons for triage ⏲️

[gaprl]

Duplicate of getsentry/sentry-javascript#11637

We might not be able to support this

[jamescqcampbell]

I think this is a different issue though, as even when we've manually set up the check-ins in this form:

const checkInId = Sentry.captureCheckIn({
  monitorSlug: "<monitor-slug>",
  status: "in_progress",
});

// Execute your scheduled task here...

// 🟢 Notify Sentry your job has completed successfully:
Sentry.captureCheckIn({
  // Make sure this variable is named `checkInId`
  checkInId,
  monitorSlug: "<monitor-slug>",
  status: "ok",
});

We still receive no records of the monitors.

So we aren't looking for automatic instrumentation, we just want to use Sentry on these routes.