Here is the metadata that SimpleSAMLphp has generated for you. You may send this metadata document to trusted partners to setup a trusted federation.
You can get the metadata xml on a dedicated URL:
https://test-idp.geant.org/module.php/saml/sp/metadata.php/default-sp
In SAML 2.0 Metadata XML format:
In SimpleSAMLphp flat file format - use this if you are using a SimpleSAMLphp entity on the other side: