Never get surprised by a breaking change again.
The libraries and APIs you depend on ship deprecation notices in a changelog you don't read every day. modsignal reads it for you and only alerts you when something you rely on is actually affected.
Get startedStripe's changelog marks the Sources API as deprecated, replaced by Payment Methods, sunset March 2027.
What modsignal extracts
- Deprecation notices
- Breaking changes
- Sunset dates
- Changelog and release notes
Every API and library you build on has a changelog, and somewhere in it is the entry that's going to break your integration in six months. Nobody reads every changelog for every dependency every week; you find out about a breaking change when the sunset date arrives and something stops working, or when a teammate spots it by accident.
modsignal watches the changelog or docs page directly and reads new entries the way an engineer would. Tell it what to flag: anything marked breaking, a deprecation notice for a specific endpoint, any mention of a sunset date. It checks on your schedule and only alerts you when a new entry actually matches what you described, not on every release note about a bug fix you don't care about.
The alert includes what changed, the sunset date if there is one, and a link back to the source, so you can file the migration ticket the same day instead of the week it breaks. This is a natural fit for the semantic tier, since changelog entries vary in wording release to release, but if you'd rather catch every single edit to a specific page verbatim, the exact-diff tier does that too, instantly and for less.
Point the alert at wherever your team already looks — a deprecation notice only does its job if the person who owns that integration sees it the same day, not three release cycles later when something's already down in production.
Set up a product and API monitor.
Write the prompt, set the interval and get the first alert when something actually changes.