Create REST API with post params

Question

I have below JSON Data for rest API {"region_id":"475","city":"city","item":[{"qty":"1","weight":"","price":"10.0000","sku":"test"}]} and i wann to create api class

I do like this

/**
 * @api
 * @param string $city
 * @param string $region_id
 * @param array $item
 * @return [].
 */
    public function estimate($city,$region_id,$item);

But return Class array does not exist also I use string [] and I get the same error. How I can pass an array as parameters?

Answer 1

pass return type @return array

Update your code with this solution :

/**
 * @api
 * @param string $city
 * @param string $region_id
 * @param array $item
 * @return array
 */
    public function estimate($city,$region_id,$item);

Valid scalar types include: mixed (or anyType), bool (or boolean), str (or string), integer (or int), float, and double

Any parameters or return values of type array can be denoted by following any of the previous types by an empty set of square brackets []

@return array|int|string|bool|float Scalar or array of scalars 

Reference

https://devdocs.magento.com/guides/v2.2/extension-dev-guide/service-contracts/service-to-web-service.html