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Question

How to access Sub-Zap Input fields

  • February 4, 2026
  • 3 replies
  • 7 views

Hi!

I have created some Sub-Zaps and they are running nicely.

But one thing is either not working or I misunderstood the concept.

You can define (required) input fields for the Sub-Zap. But so far I have not found a way to actually do anything with those fields in my Sub-Zap. I cannot reference them anywhere through the normal “previous step” output selection, and the Copilot suggested syntax of {{<zap_id>__<input field name>}} also does not show any data.

What am I missing?

3 replies

  • Author
  • Beginner
  • February 4, 2026

Quick update, in a very simple test Zap the input field suddenly appeared after a few draft/publish/test iterations.

Now to check whether my production zap behaves the same way.

[Update] Yes it does.

So either it takes some time (hours rather than minutes) to propagate the input fields all through the Zapier backend, or it was broken and now it is fixed again.


Sparsh from Automation Jinn
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Hey ​@mholtmanns,

If test is working as expected, it should work in production as well. For live zaps, you can see Zap history to spot any issues- https://zapier.com/app/history. Hope it helps!


Troy Tessalone
Zapier Orchestrator & Solution Partner
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  • Zapier Orchestrator & Solution Partner
  • February 4, 2026

Hi ​@mholtmanns 

Help links for using Sub-Zaps in Zaps: https://zapier.com/apps/sub-zap-by-zapier/integrations#help