Added Etsy API

README.md

@@ -714,6 +714,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Best Buy](https://bestbuyapis.github.io/api-documentation/#overview) | Products, Buying Options, Categories, Recommendations, Stores and Commerce | `apiKey` | Yes | Unknown |
 | [Bratabase](https://developers.bratabase.com/) | Database of different types of Bra Sizes | `OAuth` | Yes | Unknown |
 | [eBay](https://go.developer.ebay.com/) | Sell and Buy on eBay | `OAuth` | Yes | Unknown |
+| [Etsy](https://www.etsy.com/developers/documentation/getting_started/api_basics) | Manage shop and interact with listings | `OAuth` | Yes | Unknown |
 | [Wal-Mart](https://developer.walmartlabs.com/docs) | Item price and availability | `apiKey` | Yes | Unknown |
 | [Wegmans](https://dev.wegmans.io) | Wegmans Food Markets | `apiKey` | Yes | Unknown |