Expertrec’s ecommerce search autocomplete api is of the following format-
https://searchv7.expertrec.com/v6/suggestion/api_key/?q={search_query}&ssize={suggestion_size}&psize={popular_products_size}&csize={category_size}
Here is a sample api call-
https://searchv7.expertrec.com/v6/suggestion/454545fa17b5405687d9113b9c95aef4/?q=apple&ssize=10&psize=6&csize=4
Ecommerce search autocomplete api components-
- api_key– Can be obtained from your control panel (uniquely identifies your website).
- q-search query (example- apple)
- ssize– number of search suggestions (numeric value)
- psize-number of popular products.(numeric value)
- csize– number of categories to be displayed.

Have a look at https://www.expertrec.com/api/#api-Search-search for more details.