Step 1: Create a new Zap

Search for Zoho then click on it
In the Event field, click the "New lead" to trigger zap whenever there is a new lead input then click on Continue.

Step 2: Setup and test with your Zoho account

Make sure that you connect your Zoho account in the next step then click on continue.
Test your trigger in the next step
It will pull one sample lead that you've created in your Zoho account.
Click on the "Continue with the selected record".

In the next step, select the Action. Type in realestateapi and click on it.
In the App & event step, select the action that you want to do. Get property detail for your lead in this example.

Click on continue.

Next step, make sure that you connect your Reapi account/key to authorize pulling data.
In the Action step, click on the data field that you'd want to use for getting the property details. In the sample, they are fields that you can find in Zoho. Select address so the zap will always pull information from the address field.
Continue then test the step.

Adding another step into the Zap will make it possible for the results to actually reflect on your Zoho account.

Select Zoho as your last Action.
Select update module entry to update your lead in Zoho.
Use the same account in Zoho for this next step.
Track the directories that you used in your Zoho account. ( Where is the lead you want to update)
In the Item to be updated, select Custom and click on the "Id" under the New Lead in Zoho CRM option. This way it will always locate the item id that was set up in the initial trigger and then update it.

Create new custom fields inside your Zoho account before moving to the next step. Zoho does not allow adding of new fields if you're on free plan, an account upgrade is required to create custom fields. Here is the link on how you can add them once you've upgraded your account.

https://help.zoho.com/portal/en/kb/crm/customize-crm-account/customizing-fields/articles/use-custom-fields#Custom_Fields
In the same action step, select the items that you want to update on Zoho. In this sample we will input the data inside the "description" part on your Zoho lead. If you want to update the Grantee name based on the pulled property details from REAPI, type in "Grantee Name: " as your identifier and then select Data mortgage history grantee name. Do the same for the other fields that you want to update. Click on continue.
Test the step.
After clicking on "Test step", it should update your lead in Zoho which looks like this since we chose to provide property details on the description field.
The whole Zapier process should look like this.