# Invoice Ninja Octri Preview > Invoice Ninja Octri Preview API documentation ## - [Start here](https://octri-vxtvtnheg48b.octri.dev/api-reference/start-here): Start here ## Api - [GET /api/v1/clients](https://octri-vxtvtnheg48b.octri.dev/api-reference/api/get-api-v1-clients): List clients - [POST /api/v1/invoices](https://octri-vxtvtnheg48b.octri.dev/api-reference/api/post-api-v1-invoices): Create invoice - [GET /api/v1/invoices/{id}](https://octri-vxtvtnheg48b.octri.dev/api-reference/api/get-api-v1-invoices-id): Show invoice ## Optional - [Changelog](https://octri-vxtvtnheg48b.octri.dev/changelog): API version history and breaking changes