I guess one option is to use Pushover:
You can send and e-mail to the Pushover gateway and this turns them into notifications on your IOS or Android device (or your PC), or you can use the API.
You can include a URL in the message.
I use this for some of my remote devices, primarily to know when an OTA update has been completed, or when there has been a power cut, It works very well and seems extremely reliable. The documentation is good and once you set-up an account and obtained an e-mail gateway address and API key its pretty easy to set-up.
There’s a free 7 day trial then a one-off £5 fee per type of device environment (IOS, Android, Desktop).