Request to Enable Custom IML Functions

Questions
1

:bullseye: What is your goal?

I’m building a private Custom App that integrates with our company’s REST API, and I need to send optional nested objects in POST request bodies only when the calling user actually provides them. When those optional fields are left blank, the request must omit the nested object entirely rather than sending it as an empty object. Thanks

:thinking: What is the problem & what have you tried?

When an optional collection parameter is left empty, Make serializes it into the request body as an empty object {}, which my API rejects with a validation error because it expects the key to be absent entirely. I attempted to handle this in the Communication block using if() expressions and undefined, but I could not get Make to drop the empty nested object. The Make.com documentation recommended fix is the removeEmpty() custom IML function, which requires custom IML functions to be enabled on my account.

:clipboard: Error messages or input/output bundles

The API I am calling returns a 400 when the optional parameter is blank.

4

Hello @Travis_Parigi,

Welcome to the Community!

Please refer to the documentation:

Custom IML functions are not available by default. Contact us via our helpdesk if you need to create a custom IML function.

You need to contact the helpdesk to get them enabled for your account.

Contact support:

Zrzut ekranu 2026-01-18 o 05.11.06
Zrzut ekranu 2026-01-18 o 05.11.06774×492 35.1 KB

Have a nice day,
Michal

5

Thanks for the response. I tried that link for Contact Support under the Help top navigation option, and that is how I ended up at the Community. There was no option to submit a ticket to support.

Thanks

6

If you are on the free plan, you get 90 days of expert access.

After that, to get support you need to upgrade to a paid plan.

https://www.make.com/en/pricing