add Google-Sheets API

README.md

@@ -386,6 +386,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Gitlab](https://docs.gitlab.com/ee/api/) | Automate GitLab interaction programmatically | `OAuth` | Yes | Unknown |
 | [Gitter](https://developer.gitter.im/docs/welcome) | Chat for Developers | `OAuth` | Yes | Unknown |
 | [Glitterly](https://developers.glitterly.app) | Image generation API | `apiKey` | Yes | Yes |
+| [Google Sheets](https://developers.google.com/sheets/api/reference/rest) | API to read, write, and format Google Sheets data | `OAuth` | Yes | Unknown |
 | [Gorest](https://gorest.co.in/) | Online REST API for Testing and Prototyping | `OAuth` | Yes | Unknown |
 | [Hexabin](https://hexabin.herokuapp.com/) | Convert and retrieve hexadecimal, binary, decimal, and octal values with ease | No | No | Unknown |
 | [host-t.com](https://host-t.com) | Basic DNS query via HTTP GET request | No | Yes | No |