SchemaSentry

SchemaSentry is a web app that continuously monitors MongoDB/DocumentDB collections and detects schema drift before it breaks analytics, APIs, or downstream ETL. It samples documents, infers field presence/types, tracks changes over time, and alerts when new fields appear, types flip (string->object), or required fields go missing. It also generates “compatibility reports” for each service: what fields it reads/writes and how risky a change is. The MVP focuses on read-only monitoring with lightweight agents or read replicas, plus dashboards and Slack alerts. This is not a replacement database; it’s an operational safety layer for teams that moved fast and now pay for it with production bugs and brittle pipelines. Expect some false positives early; tuning and allowlists are part of the workflow. Pricing targets small-to-mid teams that can’t justify a full data platform team.