Add Srp Energy API.

README.md

@@ -587,6 +587,7 @@ API | Description | Auth | HTTPS | CORS |
 | [PM2.5 Open Data Portal](https://pm25.lass-net.org/#apis) | Open low-cost PM2.5 sensor data | No | Yes | Unknown |
 | [PM25.in](http://www.pm25.in/api_doc) | Air quality of China | `apiKey` | No | Unknown |
 | [PVWatts](https://developer.nrel.gov/docs/solar/pvwatts/v6/) | Energy production photovoltaic (PV) energy systems | `apiKey` | Yes | Unknown |
+| [Srp Energy](https://srpenergy-api-client-python.readthedocs.io/en/latest/api.html) | Hourly usage energy report for Srp customers | `apiKey` | Yes | No |
 | [UK Carbon Intensity](https://carbon-intensity.github.io/api-definitions/#carbon-intensity-api-v1-0-0) | The Official Carbon Intensity API for Great Britain developed by National Grid | No | Yes | Unknown |
 
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