How to create host record and assign the hostname to an unused IP

[#1]

Hi infoblox family,

I was looking through the documentation of infoblox and I got the API calls to search the record hosts with zone name  (testingwapi-hostname is already created by me in UI)

API call:

https://["URL"]/wapi/v2.10.3/allrecords?zone="domain_name"&name=testingwapi

I am looking to use POST API call method to create a record host with a hostname and zone and use the record host _ref to create another POST API call to assign an IPv4 address.

[#2]

It is not possible unfortunately.  The IP address must be added as part of the initial creation, either by supplying it directly or by using a next_available_ip function.