# Getting Started

- [Authentication](/master/authentication.md): ExactBuyer API's allow you to build powerful audience workflows to power every part of your business.
- [Rate Limiting](/master/rate-limiting.md)
- [Errors](/master/errors.md): What HTTP codes do we use for error identification?
- [OpenAPI Specification](/master/openapi-specification.md): The OpenAPI specification for ExactBuyer APIs.