# API Reference

Developer reference for the Cyber API.

- [Query Syntax](cyber-api-query-syntax) - boolean operators and the fields free text searches.
- [Time Range](cyber-api-time-range) - the search window and the 2-year history cap.
- [Endpoints & Authentication](cyber-api-endpoints) - base URL, endpoints, tokens, and permissions.
- [Request Parameters](cyber-api-parameters) - every parameter with defaults.
- [Response Format](cyber-api-response-format) - the JSON envelope.
- [Pagination](cyber-api-pagination) - follow the next URL.
- [Segmentation API](cyber-api-segmentation) - aggregate counts instead of posts.
- [Dark Cache & Images](cyber-api-cache-images) - cached pages and collected images.
- [Errors, Rate Limits & Credits](cyber-api-errors-limits) - what can go wrong and what it costs.