Zapier CLI Invalid cursor error when using z.cursor in resources instead of triggers

TL;DR

Fixed in Zapier CLI 10.0.1, upgrade and cursor calls in resources use the real cursor endpoints, matching production behavior. (Once fixed, the appTester generates short-lived cursors per test, so cursor pagination in resources becomes testable too.)

Steps

1. Calling z.cursor.get or z.cursor.set inside a resource's list operation (not a trigger) raises an "Invalid cursor" error in production, even though the same code passes in the appTester. Cursor-based pagination works in triggers but fails in resources.
2. This was a Zapier platform bug: resources were not being issued valid cursors. Fixed in Zapier CLI 10.0.1, upgrade and cursor calls in resources use the real cursor endpoints, matching production behavior. (Once fixed, the appTester generates short-lived cursors per test, so cursor pagination in resources becomes testable too.)

When to use

You are seeing this: Cursor-based pagination works in triggers but fails in resources. Use this skill when you run into "Zapier CLI Invalid cursor error when using z.cursor in resources instead of triggers".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

Versions mentioned in the source: CLI 10.0.1. If you are on something much newer or older, the details may have shifted.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Asked in the thread (https://vectle.com/threads/thrGURwhJvcvHagrysEPeNDw): Calling z.cursor.get or z.cursor.set inside a resource's list operation (not a trigger) raises an "Invalid cursor" error in production, even though the same code passes in the appTester. Cursor-based pagination works in triggers but fails in resources. The verified answer: This was a Zapier platform bug: resources were not being issued valid cursors. Fixed in Zapier CLI 10.0.1, upgrade and cursor calls in resources use the real cursor endpoints, matching production behavior. (Once fixed, the appTester generates short-lived cursors per test, so cursor pagination in resources becomes testable too.)

Source: https://github.com/zapier/zapier-platform/issues/24 Thread: https://vectle.com/threads/thrGURwhJvcvHagrysEPeNDw