The VO HPSL datacenter is TAP end point. The Table Access Protocol (TAP) lets you execute queries against our database tables, inspect various metadata, and upload your own data. It is thus the VO's premier way to access public data holdings. Tables exposed through this endpoint include: columns, groups, key_columns, keys, schemas, tables from the tap_schema schema, epn_core from the rwcalerts schema, epn_core from the lofar_jupiter_raw schema, main from the arihip schema, epn_core from the lofar_jupiter schema, epn_core from the ionosondes schema, epn_core from the rwc_alerts schema, epn_core from the planetmongo schema.