This Realtor API will help you get the proper data for Realtor Property, Realtor Agents and Realtor School.
It has 3 API endpoint for each one property, agents and schools. Each one of them accepts different parameters as given below:

Schools Endpoint: /realtor_data/schools/
Parameters:
city: San Jose or New York etc
state_code: CA or NY etc
school_level: It can be either one of them (elementary, middle, high, private & charter)
page: min = 1 and max can be depends on the total number of results.

Agents Endpoint: /realtor_data/agents/
Parameters:
city: San Jose or New York
state_code: CA or NY
page: min = 1 and max can be depends on the total number of results.

Property Endpoint: /realtor_data/property/
Parameters:
city: San Jose or New York
state_code: CA or NY
offset: min = 0 and max can be depends on the total number of results. but the maximum number of results you can see at a time is 42. So you need to keep increasing the offset value by 42 to achieve a pagination. To achieve pagination you have to start the offset from 0 and increase the offset by 42.