By hosting a Mesh Directory service, your (and others) IOP site can use the service as a part of the Mesh collaboration workflows (e.g. for share invitation workflow).
To enable the service on your IOP site, simply add the following section to the Reva config file:
[http.services.meshdirectory]
prefix = "meshdir"
To check that service is running properly, open the following URL in the browser:
https://$yourdomain.iop$/meshdir/?token=test&providerDomain=$yourdomain.iop$