Here's a description of all the values the input parameter search_type can take on:

place - use this search type to search for Google Places (i.e. Starbucks, Target, etc.). If the Google Place already exists within MealMe, then the mealme_store_id property in the response will hold its corresponding MealMe store ID. If the Google Place doesn't currently exist within MealMe, then the mealme_store_id property will be empty and you can attempt to add it to MealMe via the Add Store API.
address - use this search type to search for a specific address. For example, passing search=188 King will return the most similar address nearest to the provided coordinates (location_bias_latitude and location_bias_longitude), which in this case is 188 King St, San Francisco, CA 94107, US.
addresses - use this search type to perform an address autocomplete search. Alternatively, you can use the Address Search SDK to enable address autocomplete on your front end.