ttsentinel is a minimal script for website monitoring. It can be configured with a config.json file that follows the format of the example file (the offline field should be left empty).
ttsentinel checks periodically a list of websites for uptime, meaning if the return HTTP 200 OK before a set timeout interval. If a website fails to do so, ttsentinel sends a notification email to you. You can configure:
- timeout before which a website must respond
- websites to check, and the target email address
- interval to wait between website checks
- email server
Find further explainations on dev.to.