# Making API Requests
<a name="api-requests"></a>

**Topics**
+ [Making API Requests for Hosted Zones, Resource Record Sets, and Health Checks](api-requests-rest.md)
+ [Making API Requests for Domain Registration and for Route 53 Resolver](api-requests-rpc.md)
+ [Signing Amazon Route 53 API Requests](api-requests-authentication.md)
+ [Amazon Route 53 API actions by function](api-operations-by-function.md)
+ [Throttling for Amazon Route 53 API requests](throttling-api-requests.md)

This section describes how to make requests to the two Route 53 APIs:
+ A REST API for hosted zones, resource record sets, health checks, and cost allocation tags
+ RPC APIs for domain registration and for Route 53 Resolver

For each API, we describe the components of requests and the content of responses. We also describe how to authenticate requests.