Add Plino (#2428)

README.md

@@ -464,6 +464,7 @@ API | Description | Auth | HTTPS | CORS |
 | [OOPSpam](https://oopspam.com/) | Multiple spam filtering service | No | Yes | Yes |
 | [Open Page Rank](https://www.domcop.com/openpagerank/) | API for calculating and comparing metrics of different websites using Page Rank algorithm | `apiKey` | Yes | Unknown |
 | [PageCDN](https://pagecdn.com/docs/public-api) | Public API for javascript, css and font libraries on PageCDN | `apiKey` | Yes | Yes |
+| [Plino](https://plino.herokuapp.com/) | An intelligent spam filtering system | No | Yes | No |
 | [Postman](https://docs.api.getpostman.com/) | Tool for testing APIs | `apiKey` | Yes | Unknown |
 | [ProxyCrawl](https://proxycrawl.com) | Scraping and crawling anticaptcha service | `apiKey` | Yes | Unknown |
 | [Public APIs](https://github.com/davemachado/public-api) | A collective list of free JSON APIs for use in web development | No | Yes | Unknown |