Magento 2 : how to add additional information in rest API response?

Question

I have one custom table 'vendor_info' with 5 fields and I want to add this table data along with this API http://www.hostname.com/rest/V1/products?searchCriteria

Answer 1

You can achieve it using 2 ways

1. Search Criteria join processors

2. Adding extension attributes , you can write after plugin get and getList methods to get value corresponding value of vendor_info for the products and set extension attribute to them

You can get detail reference from these links Reference 1 Reference 2