# Subdomains

A [`SubdomainAvailabilityCheck`](#operation/postSubdomainAvailabilityCheck) is used to check whether a Dash subdomain is in use or not.


## Check subdomain availability

 - [POST /subdomain-availability-check](https://api-docs.dash.app/dash/openapi/subdomains/postsubdomainavailabilitycheck.md): > This endpoint is unauthenticated. Do not send a Bearer Token in the Authorization Header