# API Reference

The complete API reference: endpoints, every parameter, the response shape, and paging.

- [Time Range](data-breach-time-range) - the default window and how to reach older data.
- [Endpoints & Authentication](data-breach-endpoints) - the two endpoints and how to authenticate.
- [Request Parameters](data-breach-parameters) - every query parameter and its rules.
- [Response Format](data-breach-response-format) - root fields and paging.
- [Pagination](data-breach-pagination) - page through a result set.
- [Breach Catalog](data-breach-catalog) - look up known breaches and their UUIDs.
- [Errors, Rate Limits & Credits](data-breach-errors-limits) - status codes, limits, and access.