# Table Mutation Tracker

> Detect retroactive grade and assignment changes in a student information system, with n8n orchestration and a calendar diff UI.

- [Run a scrape](https://docs.amazingzebra.com/table-mutation-tracker/api-reference/scraping/run-a-scrape.md): Log in to the SIS portal, scrape every configured class, and return the normalized snapshot as JSON.
- [Append a snapshot to the rolling index](https://docs.amazingzebra.com/table-mutation-tracker/api-reference/rolling-index/append-a-snapshot-to-the-rolling-index.md): Diff one snapshot against the previous index entry and append the result to `rolling_index.json`.
- [Rebuild the rolling index](https://docs.amazingzebra.com/table-mutation-tracker/api-reference/rolling-index/rebuild-the-rolling-index.md): Diff every consecutive pair of snapshots in the data repo and rewrite `rolling_index.json` from scratch.
- [Health check](https://docs.amazingzebra.com/table-mutation-tracker/api-reference/operations/health-check.md): Return `{"status": "ok"}` when every required environment variable is set. Does not contact the SIS or GitHub.

## OpenAPI Specs

- [openapi](/table-mutation-tracker/openapi.json)


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