# API Reference

> Complete API reference for Bkper — REST API, bkper-js, bkper-gs, bkper-api-types, bkper-web-auth, and bkper-web-design tokens.

Technical reference documentation for all Bkper APIs and SDKs. Use the REST API directly or choose a client library for your platform.

- [bkper-api-types](https://bkper.com/docs/api/bkper-api-types.md): TypeScript type definitions for the Bkper API — shared interfaces and enumerations.
- [bkper-gs](https://bkper.com/docs/api/bkper-gs.md): Google Apps Script library for Bkper — use Bkper directly in Google Sheets and Apps Script projects.
- [bkper-js](https://bkper.com/docs/api/bkper-js.md): JavaScript/TypeScript client library for Bkper — classes, interfaces, and type definitions.
- [@bkper/web-auth](https://bkper.com/docs/api/bkper-web-auth.md): Web authentication SDK for Bkper — OAuth flows, token management, and session handling.
- [REST API](https://bkper.com/docs/api/rest.md): Full OpenAPI reference for the Bkper REST API — endpoints, parameters, and response schemas.

- [Design Tokens](https://bkper.com/docs/api/bkper-web-design.md): CSS design tokens from @bkper/web-design — typography, spacing, colors, and theming for Bkper web applications.