Add Sejda API to Documents & Productivity

README.md

@@ -661,6 +661,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Podio](https://developers.podio.com) | File sharing and productivity | `OAuth` | Yes | Unknown |
 | [PrexView](https://prexview.com) | Data from XML or JSON to PDF, HTML or Image | `apiKey` | Yes | Unknown |
 | [Restpack](https://restpack.io/) | Provides screenshot, HTML to PDF and content extraction APIs | `apiKey` | Yes | Unknown |
+| [Sejda](https://www.sejda.com/) | Read & Edit PDF from Web App | `apiKey` | Yes | Unknown |
 | [Todoist](https://developer.todoist.com) | Todo Lists | `OAuth` | Yes | Unknown |
 | [Smart Image Enhancement API](https://apilayer.com/marketplace/image_enhancement-api) | Performs image upscaling by adding detail to images through multiple super-resolution algorithms | `apiKey` | Yes | Unknown |
 | [Vector Express v2.0](https://vector.express) | Free vector file converting API | No | Yes | No |