Add MySQL Visual Explain API to Development (#413)

README.md

@@ -519,6 +519,7 @@
 | [MicroENV](https://microenv.com/) | Fake Rest API for developers | No | Yes | Unknown |
 | [Mocky](https://designer.mocky.io/) | Mock user defined test JSON for REST API endpoints | No | Yes | Yes |
 | [MY IP](https://www.myip.com/api-docs/) | Get IP address information | No | Yes | Unknown |
+| [MySQL Visual EXPLAIN](https://api.mysqlexplain.com/) | Transform MySQL EXPLAIN output to interactive graphs | No | Yes | Yes |
 | [Nationalize.io](https://nationalize.io) | Estimate the nationality of a first name | No | Yes | Yes |
 | [Netlify](https://docs.netlify.com/api/get-started/) | Netlify is a hosting service for the programmable web | `OAuth` | Yes | Unknown |
 | [NetworkCalc](https://networkcalc.com/api/docs) | Network calculators, including subnets, DNS, binary, and security tools | No | Yes | Yes |