I am offering an API node which will forward heavy-disk-loading-plugin API requests to https://api.steemit.com . AFAIK, steemit Inc is the only FULL node provider on Steem network now. Following plugin API calls are handled by my seed server.
webserver witness condenser_api network_broadcast_api account_by_key database_api block_api rc_api account_by_key_api json_rpc market_history_api follow_api
You can also vote me here: Vote for Witnesses