# API

### Requirement

The PiperX APIs provide a way to query PiperX standard (v2) and concentrated pools (v3) status. The below examples demonstrated how to query them. Note that PiperX API implemented [CORS Policy](https://aws.amazon.com/what-is/cross-origin-resource-sharing/). Therefore, if you want to use PiperX APIs from your deployed site (<https://example.xyz>), you need to contact PiperX team first to add your site.