Not able to find "Custom Field" in API

[Ruhi Tanwar]

I have created a custom field under the category name.
this custom field is seeing me on my ticket screen, but not in the API.
This field is being found in the view page source. 

Field added on 3 screens.
1.Create Request Screen
2.View Request Screen
3.Edit Request Screen.

[Ruhi Tanwar]

Hi @Martin Bayer [MoroSystems, s.r.o.]  "Classic" Jira Service Management.

[Ruhi Tanwar]

@Martin Bayer [MoroSystems, s.r.o.] 

https://my-domain/rest/servicedeskapi/servicedesk/7/requesttype/127/field

[Ruhi Tanwar]

@Martin Bayer [MoroSystems, s.r.o.]could you please help me, to add the custom field in issue type?

[Ruhi Tanwar]

@Martin Bayer [MoroSystems, s.r.o.] Thanks for your all support. I have got the option to add the field in issue type. 

[Martin Bayer [MoroSystems, s.r.o.]]

Hi @Ruhi Tanwar did you create custom field in Classic or Next-gen project?

[Martin Bayer [MoroSystems, s.r.o.]]

@Ruhi Tanwar please use threads here :). What API did you try to use? ANd what is the response?

[Martin Bayer [MoroSystems, s.r.o.]]

@Ruhi Tanwar attach some screenshots of required custom field configuration, please...